docs/archived/v0.21-docs/serving/samples/index.xml

<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
  <channel>
    <title>Knative – Knative Serving code samples</title>
    <link>https://knative.dev/v0.21-docs/serving/samples/</link>
    <description>Recent content in Knative Serving code samples on Knative</description>
    <generator>Hugo -- gohugo.io</generator>
    
	  <atom:link href="https://knative.dev/v0.21-docs/serving/samples/index.xml" rel="self" type="application/rss+xml" />
    
    
      
        
      
    
    
    <item>
      <title>V0.21-Docs: Knative Serving &#39;Cloud Events&#39; samples</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/cloudevents/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/cloudevents/</guid>
      <description>
        
        
        
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: GitHub webhook sample - Go</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/gitwebhook-go/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/gitwebhook-go/</guid>
      <description>
        
        
        &lt;p&gt;A handler written in Go that demonstrates interacting with GitHub through a
webhook.&lt;/p&gt;
&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;p&gt;You must meet the following requirements to run this sample:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Own a public domain. For example, you can create a domain with
&lt;a href=&#34;https://domains.google/&#34;&gt;Google Domains&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;A Kubernetes cluster running with the following:
&lt;ul&gt;
&lt;li&gt;Knative Serving must be installed. For details about setting up a Knative
cluster, see the &lt;a href=&#34;../../../install/index.html&#34;&gt;installation guides&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;Your Knative cluster must be
&lt;a href=&#34;../../using-a-custom-domain&#34;&gt;configured to use your custom domain&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;You must ensure that your Knative cluster uses a static IP address:
&lt;ul&gt;
&lt;li&gt;For Google Kubernetes Engine, see
&lt;a href=&#34;../../gke-assigning-static-ip-address&#34;&gt;assigning a static IP address&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;For other cloud providers, refer to your provider&amp;rsquo;s documentation.&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;An installed version of &lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;A &lt;a href=&#34;https://hub.docker.com/&#34;&gt;Docker Hub account&lt;/a&gt; to which you are able to
upload your sample&amp;rsquo;s container image.&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;build-the-sample-code&#34;&gt;Build the sample code&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Download a copy of the code:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{{&amp;lt; branch &amp;gt;}}&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/gitwebhook-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Use Docker to build a container image for this service. Replace
&lt;code&gt;{DOCKER_HUB_USERNAME}&lt;/code&gt; with your Docker Hub username in the following
commands.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;DOCKER_HUB_USERNAME&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;username

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the container, run from the project folder&lt;/span&gt;
docker build -t &lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;DOCKER_HUB_USERNAME&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/gitwebhook-go .

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Push the container to the registry&lt;/span&gt;
docker push &lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;DOCKER_HUB_USERNAME&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/gitwebhook-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a secret that holds two values from GitHub:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;A
&lt;a href=&#34;https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line/&#34;&gt;personal access token&lt;/a&gt;
that you will use to make API requests to GitHub.&lt;/li&gt;
&lt;li&gt;Ensure that you grant &lt;code&gt;read/write&lt;/code&gt; permission in the repo for that personal
access token.&lt;/li&gt;
&lt;/ul&gt;
&lt;ol&gt;
&lt;li&gt;Follow the GitHub instructions to&lt;/li&gt;
&lt;/ol&gt;
&lt;ul&gt;
&lt;li&gt;A webhook secret that you will use to validate requests.&lt;/li&gt;
&lt;/ul&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Base64 encode the access token:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ &lt;span style=&#34;color:#204a87&#34;&gt;echo&lt;/span&gt; -n &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;45d382d4a9a93c453fb7c8adc109121e7c29fa3ca&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;|&lt;/span&gt; base64
&lt;span style=&#34;color:#000&#34;&gt;NDVkMzgyZDRhOWE5M2M0NTNmYjdjOGFkYzEwOTEyMWU3YzI5ZmEzY2E&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Copy the encoded access token into &lt;code&gt;github-secret.yaml&lt;/code&gt; next to
&lt;code&gt;personalAccessToken:&lt;/code&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a webhook secret value unique to this sample, base64 encode it, and
copy it into &lt;code&gt;github-secret.yaml&lt;/code&gt; next to &lt;code&gt;webhookSecret:&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ &lt;span style=&#34;color:#204a87&#34;&gt;echo&lt;/span&gt; -n &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;mygithubwebhooksecret&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;|&lt;/span&gt; base64
bXlnaXRodWJ3ZWJob29rc2VjcmV0
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Apply the secret to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename github-secret.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Next, update the &lt;code&gt;service.yaml&lt;/code&gt; file in the project to reference the tagged
image from step 1.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Service&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;gitwebhook&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;- &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Replace {DOCKER_HUB_USERNAME} with your actual docker hub username&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;docker.io/{DOCKER_HUB_USERNAME}/gitwebhook-go:latest&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;env&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GITHUB_PERSONAL_TOKEN&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;valueFrom&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;secretKeyRef&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;githubsecret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;key&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;personalAccessToken&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;WEBHOOK_SECRET&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;valueFrom&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;secretKeyRef&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;githubsecret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;                  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;key&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;webhookSecret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Use &lt;code&gt;kubectl&lt;/code&gt; to apply the &lt;code&gt;service.yaml&lt;/code&gt; file.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl apply --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Response:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;service &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;gitwebhook&amp;#34;&lt;/span&gt; created
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a webhook in your GitHub repo using the URL for your &lt;code&gt;gitwebhook&lt;/code&gt;
service:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Retrieve the hostname for this service, using the following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc gitwebhook &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;   --output&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;custom-columns&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;NAME:.metadata.name,DOMAIN:.status.domain
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Example response:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;NAME                DOMAIN
gitwebhook          gitwebhook.default.MYCUSTOMDOMAIN.com
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;where &lt;code&gt;MYCUSTOMDOMAIN&lt;/code&gt; is the domain that you set as your
&lt;a href=&#34;../../using-a-custom-domain&#34;&gt;custom domain&lt;/a&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Go to the GitHub repository for which you have privileges to create a
webhook.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Click &lt;strong&gt;Settings&lt;/strong&gt; &amp;gt; &lt;strong&gt;Webhooks&lt;/strong&gt; &amp;gt; &lt;strong&gt;Add webhook&lt;/strong&gt; to open the Webhooks
page.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Enter the &lt;strong&gt;Payload URL&lt;/strong&gt; as &lt;code&gt;http://{DOMAIN}&lt;/code&gt;, where &lt;code&gt;{DOMAIN}&lt;/code&gt; is the
address from the &lt;code&gt;kubectl get ksvc gitwebhook&lt;/code&gt; command. For example:
&lt;code&gt;http://gitwebhook.default.MYCUSTOMDOMAIN.com&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Set the &lt;strong&gt;Content type&lt;/strong&gt; to &lt;code&gt;application/json&lt;/code&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Enter your webhook secret in &lt;strong&gt;Secret&lt;/strong&gt; using the original base value that
you set in &lt;code&gt;webhookSecret&lt;/code&gt; (not the base64 encoded value). For example:
&lt;code&gt;mygithubwebhooksecret&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;If you did not &lt;a href=&#34;../../using-a-tls-cert&#34;&gt;enabled TLS certificates&lt;/a&gt;,
click &lt;strong&gt;Disable&lt;/strong&gt; under &lt;strong&gt;SSL Validation&lt;/strong&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Click &lt;strong&gt;Add webhook&lt;/strong&gt; to create the webhook.&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;exploring&#34;&gt;Exploring&lt;/h2&gt;
&lt;p&gt;Once deployed, you can inspect the created resources with &lt;code&gt;kubectl&lt;/code&gt; commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Knative service that we created:&lt;/span&gt;
kubectl get ksvc --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Route, created by the service:&lt;/span&gt;
kubectl get route --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Configuration, created by the service:&lt;/span&gt;
kubectl get configurations --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Revision, created by the Configuration:&lt;/span&gt;
kubectl get revisions --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;testing-the-service&#34;&gt;Testing the service&lt;/h2&gt;
&lt;p&gt;Now that you have the service running and the webhook created, send a Pull
Request to the same GitHub repo where you added the webhook. If all is working
right, you&amp;rsquo;ll see the title of the PR will be modified, with the text
&lt;code&gt;(looks pretty legit)&lt;/code&gt; appended the end of the title.&lt;/p&gt;
&lt;h2 id=&#34;cleaning-up&#34;&gt;Cleaning up&lt;/h2&gt;
&lt;p&gt;To clean up the sample service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: gRPC Server - Go</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/grpc-ping-go/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/grpc-ping-go/</guid>
      <description>
        
        
        &lt;p&gt;A &lt;a href=&#34;https://grpc.io&#34;&gt;gRPC&lt;/a&gt; server written in Go.&lt;/p&gt;
&lt;p&gt;This sample can be used to try out gRPC, HTTP/2, and custom port configuration
in a knative service.&lt;/p&gt;
&lt;p&gt;The container image is built with two binaries: the server and the client.
This is done for ease of testing and is not a recommended practice
for production containers.&lt;/p&gt;
&lt;h2 id=&#34;prerequisites&#34;&gt;Prerequisites&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;p&gt;&lt;a href=&#34;../../../install/index.html&#34;&gt;Install the latest version of Knative Serving&lt;/a&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Install &lt;a href=&#34;https://www.docker.com/&#34;&gt;docker&lt;/a&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;A &lt;a href=&#34;https://hub.docker.com&#34;&gt;Docker Hub account&lt;/a&gt; to which you can upload the sample&amp;rsquo;s container image.&lt;/p&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;build-and-deploy-the-sample-code&#34;&gt;Build and Deploy the sample code&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;Download a copy of the code:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{{&amp;lt; branch &amp;gt;}}&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/grpc-ping-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;Use Docker to build a container image for this service and push to Docker Hub.&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;Replace &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub username then run the commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the container on your local machine.&lt;/span&gt;
docker build --tag &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{username}/grpc-ping-go&amp;#34;&lt;/span&gt; .

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Push the container to docker registry.&lt;/span&gt;
docker push &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{username}/grpc-ping-go&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;
&lt;p&gt;Update the &lt;code&gt;service.yaml&lt;/code&gt; file in the project to reference the published image from step 1.&lt;/p&gt;
&lt;p&gt;Replace &lt;code&gt;{username}&lt;/code&gt; in &lt;code&gt;service.yaml&lt;/code&gt; with your Docker Hub user name:&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Service&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;grpc-ping&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;docker.io/{username}/grpc-ping-go&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;ports&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;h2c&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containerPort&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;8080&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;4&#34;&gt;
&lt;li&gt;Use &lt;code&gt;kubectl&lt;/code&gt; to deploy the service.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Response:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;service &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;grpc-ping&amp;#34;&lt;/span&gt; created
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;exploring&#34;&gt;Exploring&lt;/h2&gt;
&lt;p&gt;Once deployed, you can inspect the created resources with &lt;code&gt;kubectl&lt;/code&gt; commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Knative service that we created:&lt;/span&gt;
kubectl get ksvc --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Route, created by the service:&lt;/span&gt;
kubectl get route --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Configuration, created by the service:&lt;/span&gt;
kubectl get configurations --output yaml

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This will show the Revision, created by the Configuration:&lt;/span&gt;
kubectl get revisions --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;testing-the-service&#34;&gt;Testing the service&lt;/h2&gt;
&lt;p&gt;Testing the gRPC service requires using a gRPC client built from the same
protobuf definition used by the server.&lt;/p&gt;
&lt;p&gt;The Dockerfile builds the client binary. To run the client you will use the
same container image deployed for the server with an override to the
entrypoint command to use the client binary instead of the server binary.&lt;/p&gt;
&lt;p&gt;Replace &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub user name and run the command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker run --rm &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/grpc-ping-go &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;  /client &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;  -server_addr&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;grpc-ping.default.1.2.3.4.xip.io:80&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;  -insecure
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;The arguments after the container tag &lt;code&gt;{username}/grpc-ping-go&lt;/code&gt; are used
instead of the entrypoint command defined in the Dockerfile &lt;code&gt;CMD&lt;/code&gt; statement.&lt;/p&gt;

      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Knative &#39;Hello World&#39; samples</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/hello-world/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/hello-world/</guid>
      <description>
        
        
        
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Knative multi-container samples</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/multi-container/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/multi-container/</guid>
      <description>
        
        
        &lt;p&gt;A simple web app written in Go that you can use for multi container testing.&lt;/p&gt;
&lt;h2 id=&#34;prerequisites&#34;&gt;Prerequisites&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed and DNS configured. Follow the
&lt;a href=&#34;../../../install/index.html&#34;&gt;installation instructions&lt;/a&gt; if you need to
create one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;li&gt;Make sure multi-container flag is enabled as part of &lt;code&gt;config-features&lt;/code&gt; configmap.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;The following steps show how you can use the sample code and deploy the app to your
cluster.&lt;/p&gt;
&lt;p&gt;You can download a working copy of the sample, by entering the
following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{{&amp;lt; branch &amp;gt;}}&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;using-the-sample-code&#34;&gt;Using the sample code&lt;/h2&gt;
&lt;p&gt;To test multi container functionality, you must create two containers: a serving container, and a sidecar container.&lt;/p&gt;
&lt;p&gt;The &lt;code&gt;multi-container&lt;/code&gt; directory is provided in the sample code, and contains predefined code and dockerfiles for creating the containers.&lt;/p&gt;
&lt;p&gt;You can update the default files and YAML by using the steps outlined in this section.&lt;/p&gt;
&lt;h3 id=&#34;serving-container&#34;&gt;Serving Container&lt;/h3&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;After you have cloned the sample repository, navigate to the servingcontainer directory:&lt;/p&gt;
&lt;p&gt;&lt;code&gt;cd knative-docs/docs/serving/samples/multi-container/servingcontainer&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a basic web server which listens on port 8881.
You can do this by copying the following code into the &lt;code&gt;servingcontainer.go&lt;/code&gt; file:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-go&#34; data-lang=&#34;go&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;package&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;   
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;import&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;fmt&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;io/ioutil&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;log&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;net/http&amp;#34;&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;handler&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ResponseWriter&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;r&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Request&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Println&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving container received a request.&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;res&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Get&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;http://127.0.0.1:8882&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;if&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
     &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatal&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;resp&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ioutil&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ReadAll&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;res&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Body&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;if&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
     &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatal&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;fmt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fprintln&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#204a87&#34;&gt;string&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;resp&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;))&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;()&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Print&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving container started...&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;HandleFunc&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;handler&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatal&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ListenAndServe&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;:8881&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;))&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Copy the following code into the &lt;code&gt;Dockerfile&lt;/code&gt; file:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-docker&#34; data-lang=&#34;docker&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use the official Golang image to create a build artifact.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This is based on Debian and sets the GOPATH to /go.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://hub.docker.com/_/golang&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; golang:1.15 as builder&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Create and change to the app directory.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;WORKDIR&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; /app&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Retrieve application dependencies using go modules.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Allows container builds to reuse downloaded dependencies.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; go.* ./&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; go mod download&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy local code to the container image.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; . ./&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the binary.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# -mod=readonly ensures immutable go.mod and go.sum in container builds.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;CGO_ENABLED&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;0&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;GOOS&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;linux go build -mod&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87&#34;&gt;readonly&lt;/span&gt; -v -o servingcontainer&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use the official Alpine image for a lean production container.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://hub.docker.com/_/alpine&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; alpine:3&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; apk add --no-cache ca-certificates&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy the binary to the production image from the builder stage.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; --from&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;builder /app/servingcontainer /servingcontainer&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Run the web service on container startup.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;CMD&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;[&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/servingcontainer&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;]&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h3 id=&#34;sidecar-container&#34;&gt;Sidecar Container&lt;/h3&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;After you have cloned the sample repository, navigate to the sidecarcontainer directory:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-text&#34; data-lang=&#34;text&#34;&gt;cd -
cd knative-docs/docs/serving/samples/multi-container/sidecarcontainer
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a basic web server which listens on port 8882.
You can do this by copying the following code into the &lt;code&gt;sidecarcontainer.go&lt;/code&gt; file:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-go&#34; data-lang=&#34;go&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;package&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;import&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;fmt&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;log&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;net/http&amp;#34;&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;handler&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ResponseWriter&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;r&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Request&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Println&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;sidecar container received a request.&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;fmt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fprintln&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Yay!! multi-container works&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;()&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Print&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;sidecar container started...&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;HandleFunc&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;handler&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatal&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ListenAndServe&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;:8882&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;))&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Copy the following code into the &lt;code&gt;Dockerfile&lt;/code&gt; file:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-docker&#34; data-lang=&#34;docker&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use the official Golang image to create a build artifact.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This is based on Debian and sets the GOPATH to /go.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://hub.docker.com/_/golang&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; golang:1.15 as builder&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Create and change to the app directory.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;WORKDIR&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; /app&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Retrieve application dependencies using go modules.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Allows container builds to reuse downloaded dependencies.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; go.* ./&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; go mod download&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy local code to the container image.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; . ./&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the binary.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# -mod=readonly ensures immutable go.mod and go.sum in container builds.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;CGO_ENABLED&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;0&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;GOOS&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;linux go build -mod&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#204a87&#34;&gt;readonly&lt;/span&gt; -v -o sidecarcontainer&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use the official Alpine image for a lean production container.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://hub.docker.com/_/alpine&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; alpine:3&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; apk add --no-cache ca-certificates   &lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy the binary to the production image from the builder stage.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; --from&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;builder /app/sidecarcontainer /sidecarcontainer   &lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Run the web service on container startup.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;CMD&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;[&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/sidecarcontainer&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;]&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h3 id=&#34;writing-knative-service-yaml&#34;&gt;Writing Knative Service YAML&lt;/h3&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;After you have cloned the sample repository, navigate to the &lt;code&gt;multi-container&lt;/code&gt; directory:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;&lt;code&gt;cd -&lt;/code&gt;&lt;/li&gt;
&lt;li&gt;&lt;code&gt;cd knative-docs/docs/serving/samples/multi-container/&lt;/code&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Copy the following YAML service definition into the &lt;code&gt;service.yaml&lt;/code&gt; file:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Service&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;multi-container&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;docker.io/{username}/servingcontainer&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;ports&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containerPort&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;8881&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;docker.io/{username}/sidecarcontainer&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;&lt;strong&gt;NOTE:&lt;/strong&gt; Replace &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub username.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Use Go tool to create a
&lt;a href=&#34;https://github.com/golang/go/wiki/Modules#gomod&#34;&gt;&lt;code&gt;go.mod&lt;/code&gt;&lt;/a&gt; manifest:&lt;/p&gt;
&lt;p&gt;servingcontainer&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; -
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/multi-container/servingcontainer
go mod init github.com/knative/docs/docs/serving/samples/multi-container/servingcontainer 
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;sidecarcontainer&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; -
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/multi-container/sidecarcontainer
go mod init github.com/knative/docs/docs/serving/samples/multi-container/sidecarcontainer
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;building-and-deploying-the-sample&#34;&gt;Building and deploying the sample&lt;/h2&gt;
&lt;p&gt;After you have modified the sample code files you can build and deploy the sample app.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Use Docker to build the sample code into a container. To build and push with
Docker Hub, run these commands replacing &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub
username:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the container on your local machine&lt;/span&gt;
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; -
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/multi-container/servingcontainer
docker build -t &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/servingcontainer .
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; -
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/multi-container/sidecarcontainer
docker build -t &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/sidecarcontainer .
&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Push the container to docker registry&lt;/span&gt;
docker push &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/servingcontainer
docker push &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/sidecarcontainer
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;After the build has completed and the container is pushed to Docker Hub, you
can deploy the app into your cluster. Ensure that the container image value
in &lt;code&gt;service.yaml&lt;/code&gt; matches the container you built in the previous step. Apply
the configuration using &lt;code&gt;kubectl&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; -
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/multi-container
kubectl apply --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Now that your service is created, Knative will perform the following steps:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a new immutable revision for this version of the app.&lt;/li&gt;
&lt;li&gt;Network programming to create a route, ingress, service, and load balance
for your app.&lt;/li&gt;
&lt;li&gt;Automatically scale your pods up and down (including to zero active pods).&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Run the following command to find the domain URL for your service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc multi-container  --output&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;custom-columns&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;NAME:.metadata.name,URL:.status.url
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Example:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt; NAME                URL
 multi-container       http://multi-container.default.1.2.3.4.xip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Now you can make a request to your app and see the result. Replace
the URL below with the URL returned in the previous command.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://multi-container.default.1.2.3.4.xip.io
Yay!! multi-container works
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;blockquote&gt;
&lt;p&gt;Note: Add &lt;code&gt;-v&lt;/code&gt; option to get more detail if the &lt;code&gt;curl&lt;/code&gt; command failed.&lt;/p&gt;
&lt;/blockquote&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service record:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Creating a RESTful Service - Go</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/rest-api-go/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/rest-api-go/</guid>
      <description>
        
        
        &lt;p&gt;This &amp;ldquo;stock ticker&amp;rdquo; sample demonstrates how to create and run a simple RESTful
service on Knative Serving. The exposed endpoint outputs the stock price for a
given &amp;ldquo;&lt;a href=&#34;https://www.marketwatch.com/tools/quotes/lookup.asp&#34;&gt;stock symbol&lt;/a&gt;&amp;rdquo;,
like &lt;code&gt;AAPL&lt;/code&gt;,&lt;code&gt;AMZN&lt;/code&gt;, &lt;code&gt;GOOG&lt;/code&gt;, &lt;code&gt;MSFT&lt;/code&gt;, etc.&lt;/p&gt;
&lt;h2 id=&#34;prerequisites&#34;&gt;Prerequisites&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;A Kubernetes cluster with &lt;a href=&#34;../../../install/index.html&#34;&gt;Knative Serving&lt;/a&gt; installed
and DNS configured.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;a href=&#34;https://docs.docker.com/get-started/#prepare-your-docker-environment&#34;&gt;Docker&lt;/a&gt;
installed locally.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;code&gt;envsubst&lt;/code&gt; installed locally. This is installed by the &lt;code&gt;gettext&lt;/code&gt; package. If
not installed it can be installed by a Linux package manager, or by
&lt;a href=&#34;https://brew.sh/&#34;&gt;Homebrew&lt;/a&gt; on OS X.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Download a copy of the code:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{{&amp;lt; branch &amp;gt;}}&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;setup&#34;&gt;Setup&lt;/h2&gt;
&lt;p&gt;In order to run an application on Knative Serving a container image must be
available to fetch from a container registry.&lt;/p&gt;
&lt;p&gt;This sample uses Docker for both building and pushing.&lt;/p&gt;
&lt;p&gt;To build and push to a container registry using Docker:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;From the &lt;code&gt;knative-docs&lt;/code&gt; directory, run the following command to set your
container registry endpoint as an environment variable.&lt;/p&gt;
&lt;p&gt;This sample uses
&lt;a href=&#34;https://cloud.google.com/container-registry/&#34;&gt;Google Container Registry (GCR)&lt;/a&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;REPO&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;gcr.io/&amp;lt;YOUR_PROJECT_ID&amp;gt;&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Set up your container registry to make sure you are ready to push.&lt;/p&gt;
&lt;p&gt;To push to GCR, you need to:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a
&lt;a href=&#34;https://cloud.google.com/resource-manager/docs/creating-managing-projects#creating_a_project&#34;&gt;Google Cloud Platform project&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;Enable the
&lt;a href=&#34;https://console.cloud.google.com/apis/library/containerregistry.googleapis.com&#34;&gt;Google Container Registry API&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;Setup an
&lt;a href=&#34;https://cloud.google.com/container-registry/docs/advanced-authentication#gcloud_as_a_docker_credential_helper&#34;&gt;auth helper&lt;/a&gt;
to give the Docker client the permissions it needs to push.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;If you are using a different container registry, you will want to follow the
registry specific instructions for both setup and authorizing the image push.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Use Docker to build your application container:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker build &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;  --tag &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;REPO&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;/rest-api-go&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;  --file docs/serving/samples/rest-api-go/Dockerfile .
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Push your container to a container registry:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;docker push &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;REPO&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;/rest-api-go&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Substitute the image reference path in the template with our published image
path. The command below substitutes using the ${REPO} variable into a new
file called &lt;code&gt;docs/serving/samples/rest-api-go/sample.yaml&lt;/code&gt;.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;envsubst &amp;lt; docs/serving/samples/rest-api-go/sample-template.yaml &amp;gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;docs/serving/samples/rest-api-go/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;deploy-the-service&#34;&gt;Deploy the Service&lt;/h2&gt;
&lt;p&gt;Now that our image is available from the container registry, we can deploy the
Knative Serving sample:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename docs/serving/samples/rest-api-go/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;The above command creates a Knative Service within your Kubernetes cluster in
the default namespace.&lt;/p&gt;
&lt;h2 id=&#34;explore-the-service&#34;&gt;Explore the Service&lt;/h2&gt;
&lt;p&gt;The Knative Service creates the following child resources:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Knative Route&lt;/li&gt;
&lt;li&gt;Knative Configuration&lt;/li&gt;
&lt;li&gt;Knative Revision&lt;/li&gt;
&lt;li&gt;Kubernetes Deployment&lt;/li&gt;
&lt;li&gt;Kubernetes Service&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;You can inspect the created resources with the following &lt;code&gt;kubectl&lt;/code&gt; commands:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;p&gt;View the created Service resource:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc stock-service-example --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;View the created Route resource:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get route -l &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving.knative.dev/service=stock-service-example&amp;#34;&lt;/span&gt; --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;View the Kubernetes Service created by the Route&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get service -l &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving.knative.dev/service=stock-service-example&amp;#34;&lt;/span&gt; --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;View the created Configuration resource:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get configuration -l &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving.knative.dev/service=stock-service-example&amp;#34;&lt;/span&gt; --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;View the Revision that was created by our Configuration:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get revision -l &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving.knative.dev/service=stock-service-example&amp;#34;&lt;/span&gt; --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;View the Deployment created by our Revision&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get deployment -l &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;serving.knative.dev/service=stock-service-example&amp;#34;&lt;/span&gt; --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;access-the-service&#34;&gt;Access the Service&lt;/h2&gt;
&lt;p&gt;To access this service and run the stock ticker, you first obtain the service URL,
and then you run &lt;code&gt;curl&lt;/code&gt; commands to send request with your stock symbol.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Get the URL of the service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc stock-service-example  --output&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;custom-columns&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;NAME:.metadata.name,URL:.status.url
NAME                    URL
stock-service-example   http://stock-service-example.default.1.2.3.4.xip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Send requests to the service using &lt;code&gt;curl&lt;/code&gt;:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the index endpoint:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://stock-service-example.default.1.2.3.4.xip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Response body: &lt;code&gt;Welcome to the stock app!&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the &lt;code&gt;/stock&lt;/code&gt; endpoint:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://stock-service-example.default.1.2.3.4.xip.io/stock
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Response body: &lt;code&gt;stock ticker not found!, require /stock/{ticker}&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the &lt;code&gt;/stock&lt;/code&gt; endpoint with your
&amp;ldquo;&lt;a href=&#34;https://www.marketwatch.com/tools/quotes/lookup.asp&#34;&gt;stock symbol&lt;/a&gt;&amp;quot;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://stock-service-example.default.1.2.3.4.xip.io/stock/&amp;lt;SYMBOL&amp;gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;where &lt;code&gt;&amp;lt;SYMBOL&amp;gt;&lt;/code&gt; is your &amp;ldquo;stock symbol&amp;rdquo;.&lt;/p&gt;
&lt;p&gt;Response body: &lt;code&gt;stock price for ticker &amp;lt;SYMBOL&amp;gt; is &amp;lt;PRICE&amp;gt;&lt;/code&gt;&lt;/p&gt;
&lt;p&gt;&lt;strong&gt;Example&lt;/strong&gt;&lt;/p&gt;
&lt;p&gt;Request:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://stock-service-example.default.1.2.3.4.xip.io/stock/FAKE
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Response: &lt;code&gt;stock price for ticker FAKE is 0.00&lt;/code&gt;&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;next-steps&#34;&gt;Next Steps&lt;/h2&gt;
&lt;p&gt;The &lt;a href=&#34;../traffic-splitting/index.html&#34;&gt;traffic splitting example&lt;/a&gt; continues from
here to walk you through how to create new Revisions and then use traffic
splitting between those Revisions.&lt;/p&gt;
&lt;h2 id=&#34;clean-up&#34;&gt;Clean Up&lt;/h2&gt;
&lt;p&gt;To clean up the sample Service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename docs/serving/samples/rest-api-go/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Routing across multiple Knative services - Go</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/knative-routing-go/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/knative-routing-go/</guid>
      <description>
        
        
        &lt;p&gt;This example shows how to map multiple Knative services to different paths under
a single domain name using the Istio VirtualService concept. Istio is a
general-purpose reverse proxy, therefore these directions can also be used to
configure routing based on other request data such as headers, or even to map
Knative and external resources under the same domain name.&lt;/p&gt;
&lt;p&gt;In this sample, we set up two web services: &lt;code&gt;Search&lt;/code&gt; service and &lt;code&gt;Login&lt;/code&gt;
service, which simply read in an env variable &lt;code&gt;SERVICE_NAME&lt;/code&gt; and prints
&lt;code&gt;&amp;quot;${SERVICE_NAME} is called&amp;quot;&lt;/code&gt;. We&amp;rsquo;ll then create a VirtualService with host
&lt;code&gt;example.com&lt;/code&gt;, and define routing rules in the VirtualService so that
&lt;code&gt;example.com/search&lt;/code&gt; maps to the Search service, and &lt;code&gt;example.com/login&lt;/code&gt; maps to
the Login service.&lt;/p&gt;
&lt;h2 id=&#34;prerequisites&#34;&gt;Prerequisites&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;A Kubernetes cluster with &lt;a href=&#34;../../../install/index.html&#34;&gt;Knative Serving&lt;/a&gt;
installed.&lt;/li&gt;
&lt;li&gt;Install
&lt;a href=&#34;https://docs.docker.com/get-started/#prepare-your-docker-environment&#34;&gt;Docker&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;Acquire a domain name.
&lt;ul&gt;
&lt;li&gt;In this example, we use &lt;code&gt;example.com&lt;/code&gt;. If you don&amp;rsquo;t have a domain name, you
can modify your hosts file (on Mac or Linux) to map &lt;code&gt;example.com&lt;/code&gt; to your
cluster&amp;rsquo;s ingress IP.&lt;/li&gt;
&lt;li&gt;If you have configured a custom domain for your Knative installation, we
will refer to it as &amp;lt;YOUR_DOMAIN_NAME&amp;gt; in the rest of this document&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;Check out the code:&lt;/li&gt;
&lt;/ol&gt;
&lt;pre&gt;&lt;code&gt;go get -d github.com/knative/docs/docs/serving/samples/knative-routing-go
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;setup&#34;&gt;Setup&lt;/h2&gt;
&lt;p&gt;To check the domain name, run the following command:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl get cm  -n knative-serving config-domain -o yaml
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;Then, check the value for &lt;code&gt;data&lt;/code&gt;. The domain name should be in the format of
&lt;code&gt;&amp;lt;YOUR_DOMAIN_NAME&amp;gt;: &amp;quot;&amp;quot;&lt;/code&gt;, if it is available.&lt;/p&gt;
&lt;p&gt;Build the application container and publish it to a container registry:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;Move into the sample directory:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;$GOPATH&lt;/span&gt;/src/github.com/knative/docs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;Set your preferred container registry:&lt;/li&gt;
&lt;/ol&gt;
&lt;p&gt;If you use Google Container Registry (GCR), you will need to enable the
&lt;a href=&#34;https://console.cloud.google.com/apis/library/containerregistry.googleapis.com&#34;&gt;GCR API&lt;/a&gt;
in your GCP project.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;REPO&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;gcr.io/&amp;lt;YOUR_PROJECT_ID&amp;gt;&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;If you use Docker Hub as your docker image registry, replace &lt;username&gt; with
your dockerhub username and run the following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;REPO&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;docker.io/&amp;lt;username&amp;gt;&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;Use Docker to build your application container:&lt;/li&gt;
&lt;/ol&gt;
&lt;pre&gt;&lt;code&gt;docker build \
  --tag &amp;quot;${REPO}/knative-routing-go&amp;quot; \
  --file=docs/serving/samples/knative-routing-go/Dockerfile .
&lt;/code&gt;&lt;/pre&gt;&lt;ol start=&#34;4&#34;&gt;
&lt;li&gt;Push your container to a container registry:&lt;/li&gt;
&lt;/ol&gt;
&lt;pre&gt;&lt;code&gt;docker push &amp;quot;${REPO}/knative-routing-go&amp;quot;
&lt;/code&gt;&lt;/pre&gt;&lt;ol start=&#34;5&#34;&gt;
&lt;li&gt;
&lt;p&gt;Replace the image reference path with our published image path in the
configuration file &lt;code&gt;docs/serving/samples/knative-routing-go/sample.yaml&lt;/code&gt;:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Manually replace:
&lt;code&gt;image: github.com/knative/docs/docs/serving/samples/knative-routing-go&lt;/code&gt;
with &lt;code&gt;image: ${REPO}/knative-routing-go&lt;/code&gt; If you manually changed the .yaml
file, you must replace ${REPO} with the correct path on your local
machine.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;Or&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Run this command:&lt;/li&gt;
&lt;/ul&gt;
&lt;pre&gt;&lt;code&gt;perl -pi -e &amp;quot;s@github.com/knative/docs/docs/serving/samples@${REPO}@g&amp;quot; docs/serving/samples/knative-routing-go/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;deploy-the-service&#34;&gt;Deploy the Service&lt;/h2&gt;
&lt;p&gt;Deploy the Knative Serving sample:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl apply --filename docs/serving/samples/knative-routing-go/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;exploring-the-routes&#34;&gt;Exploring the Routes&lt;/h2&gt;
&lt;p&gt;A shared Gateway &lt;code&gt;knative-ingress-gateway&lt;/code&gt; is used within Knative service mesh
for serving all incoming traffic. You can inspect it and its corresponding
Kubernetes service with:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Check the shared Gateway:&lt;/li&gt;
&lt;/ul&gt;
&lt;pre&gt;&lt;code&gt;kubectl get Gateway --namespace knative-serving --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;ul&gt;
&lt;li&gt;Check the corresponding Kubernetes service for the shared Gateway:&lt;/li&gt;
&lt;/ul&gt;
&lt;pre&gt;&lt;code&gt;INGRESSGATEWAY=istio-ingressgateway

kubectl get svc $INGRESSGATEWAY --namespace istio-system --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;ul&gt;
&lt;li&gt;Inspect the deployed Knative services with:&lt;/li&gt;
&lt;/ul&gt;
&lt;pre&gt;&lt;code&gt;kubectl get ksvc
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;You should see 2 Knative services: &lt;code&gt;search-service&lt;/code&gt; and &lt;code&gt;login-service&lt;/code&gt;.&lt;/p&gt;
&lt;h3 id=&#34;access-the-services&#34;&gt;Access the Services&lt;/h3&gt;
&lt;ol&gt;
&lt;li&gt;Find the shared Gateway IP and export as an environment variable:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#000&#34;&gt;INGRESSGATEWAY&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;istio-ingressgateway

&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;kubectl get svc &lt;span style=&#34;color:#000&#34;&gt;$INGRESSGATEWAY&lt;/span&gt; --namespace istio-system &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;    --output &lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{.status.loadBalancer.ingress[*][&amp;#39;ip&amp;#39;]}&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;Find the &lt;code&gt;Search&lt;/code&gt; service URL with:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# kubectl get route search-service  --output=custom-columns=NAME:.metadata.name,URL:.status.url&lt;/span&gt;
NAME              URL
search-service    http://search-service.default.example.com
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;Make a curl request to the service:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt; --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host:search-service.default.example.com&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You should see: &lt;code&gt;Search Service is called !&lt;/code&gt;&lt;/p&gt;
&lt;ol start=&#34;4&#34;&gt;
&lt;li&gt;Similarly, you can also directly access &amp;ldquo;Login&amp;rdquo; service with:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt; --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host:login-service.default.example.com&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You should see: &lt;code&gt;Login Service is called !&lt;/code&gt;&lt;/p&gt;
&lt;h2 id=&#34;apply-custom-routing-rule&#34;&gt;Apply Custom Routing Rule&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;Apply the custom routing rules defined in &lt;code&gt;routing.yaml&lt;/code&gt; file with:&lt;/li&gt;
&lt;/ol&gt;
&lt;pre&gt;&lt;code&gt;kubectl apply --filename docs/serving/samples/knative-routing-go/routing.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;If you have configured a custom domain name for your service, please replace all
mentions of &amp;ldquo;example.com&amp;rdquo; in &lt;code&gt;routing.yaml&lt;/code&gt; with &amp;ldquo;&amp;lt;YOUR_DOMAIN_NAME&amp;gt;&amp;rdquo; for
spec.hosts and spec.http.rewrite.authority.&lt;/p&gt;
&lt;p&gt;In addition, you need to verify how your domain template is defined. By default,
we use the format of {{.Name}}.{{.Namespace}}, like search-service.default and
login-service.default. However, some Knative environments may use other format
like {{.Name}}-{{.Namespace}}. You can find out the format by running the
command:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl get cm  -n knative-serving config-network -o yaml
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;Then look for the value for &lt;code&gt;domainTemplate&lt;/code&gt;. If it is
&lt;code&gt;{{.Name}}-{{.Namespace}}.{{.Domain}}&lt;/code&gt;, you need to change
&lt;code&gt;search-service.default&lt;/code&gt; into &lt;code&gt;search-service-default&lt;/code&gt; and
&lt;code&gt;login-service.default&lt;/code&gt; into &lt;code&gt;login-service-default&lt;/code&gt; as well in &lt;code&gt;routing.yaml&lt;/code&gt;.&lt;/p&gt;
&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;The &lt;code&gt;routing.yaml&lt;/code&gt; file will generate a new VirtualService &lt;code&gt;entry-route&lt;/code&gt; for
domain &lt;code&gt;example.com&lt;/code&gt; or your own domain name. View the VirtualService:&lt;/li&gt;
&lt;/ol&gt;
&lt;pre&gt;&lt;code&gt;kubectl get VirtualService entry-route --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the &lt;code&gt;Search&lt;/code&gt; service and the &lt;code&gt;Login&lt;/code&gt; service by using
corresponding URIs. You should get the same results as directly accessing
these services. Get the ingress IP:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#000&#34;&gt;INGRESSGATEWAY&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;istio-ingressgateway

&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;kubectl get svc &lt;span style=&#34;color:#000&#34;&gt;$INGRESSGATEWAY&lt;/span&gt; --namespace istio-system &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;    --output &lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{.status.loadBalancer.ingress[*][&amp;#39;ip&amp;#39;]}&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;ul&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the Search service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/search --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host: example.com&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;or&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/search --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host: &amp;lt;YOUR_DOMAIN_NAME&amp;gt;&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;for the case using your own domain.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Send a request to the Login service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/login --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host: example.com&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;or&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GATEWAY_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;/login --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host: &amp;lt;YOUR_DOMAIN_NAME&amp;gt;&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;for the case using your own domain.&lt;/p&gt;
&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;how-it-works&#34;&gt;How It Works&lt;/h2&gt;
&lt;p&gt;When an external request with host &lt;code&gt;example.com&lt;/code&gt; or your own domain name reaches
&lt;code&gt;knative-ingress-gateway&lt;/code&gt; Gateway, the &lt;code&gt;entry-route&lt;/code&gt; VirtualService will check
if it has &lt;code&gt;/search&lt;/code&gt; or &lt;code&gt;/login&lt;/code&gt; URI. If the URI matches, then the host of
request will be rewritten into the host of &lt;code&gt;Search&lt;/code&gt; service or &lt;code&gt;Login&lt;/code&gt; service
correspondingly. This resets the final destination of the request. The request
with updated host will be forwarded to &lt;code&gt;knative-ingress-gateway&lt;/code&gt; Gateway again.
The Gateway proxy checks the updated host, and forwards it to &lt;code&gt;Search&lt;/code&gt; or
&lt;code&gt;Login&lt;/code&gt; service according to its host setting.&lt;/p&gt;
&lt;p&gt;&lt;img src=&#34;./images/knative-routing-sample-flow.png&#34; alt=&#34;Object model&#34;&gt;&lt;/p&gt;
&lt;h2 id=&#34;clean-up&#34;&gt;Clean Up&lt;/h2&gt;
&lt;p&gt;To clean up the sample resources:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename docs/serving/samples/knative-routing-go/sample.yaml
kubectl delete --filename docs/serving/samples/knative-routing-go/routing.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Knative Secrets - Go</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/secrets-go/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/secrets-go/</guid>
      <description>
        
        
        &lt;p&gt;A simple web app written in Go that you can use for testing. It demonstrates how
to use a Kubernetes secret as a Volume with Knative. We will create a new Google
Service Account and place it into a Kubernetes secret, then we will mount it
into a container as a Volume.&lt;/p&gt;
&lt;p&gt;Follow the steps below to create the sample code and then deploy the app to your
cluster. You can also download a working copy of the sample, by running the
following commands:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;git clone -b &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{{&amp;lt; branch &amp;gt;}}&amp;#34;&lt;/span&gt; https://github.com/knative/docs knative-docs
&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; knative-docs/docs/serving/samples/secrets-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with Knative installed. Follow the
&lt;a href=&#34;../../../install/index.html&#34;&gt;installation instructions&lt;/a&gt; if you need to create
one.&lt;/li&gt;
&lt;li&gt;&lt;a href=&#34;https://www.docker.com&#34;&gt;Docker&lt;/a&gt; installed and running on your local machine,
and a Docker Hub account configured (we&amp;rsquo;ll use it for a container registry).&lt;/li&gt;
&lt;li&gt;Create a
&lt;a href=&#34;https://cloud.google.com/resource-manager/docs/creating-managing-projects&#34;&gt;Google Cloud project&lt;/a&gt;
and install the &lt;code&gt;gcloud&lt;/code&gt; CLI and run &lt;code&gt;gcloud auth login&lt;/code&gt;. This sample will use
a mix of &lt;code&gt;gcloud&lt;/code&gt; and &lt;code&gt;kubectl&lt;/code&gt; commands. The rest of the sample assumes that
you&amp;rsquo;ve set the &lt;code&gt;$PROJECT_ID&lt;/code&gt; environment variable to your Google Cloud project
id, and also set your project ID as default using
&lt;code&gt;gcloud config set project $PROJECT_ID&lt;/code&gt;.&lt;/li&gt;
&lt;/ul&gt;
&lt;h2 id=&#34;recreating-the-sample-code&#34;&gt;Recreating the sample code&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Create a new file named &lt;code&gt;secrets.go&lt;/code&gt; and paste the following code. This code
creates a basic web server which listens on port 8080:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-go&#34; data-lang=&#34;go&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;package&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;

&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;import&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;context&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;fmt&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;log&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;net/http&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;os&amp;#34;&lt;/span&gt;

 &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;cloud.google.com/go/storage&amp;#34;&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;

&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;main&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;()&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Print&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Secrets sample started.&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;

 &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This sets up the standard GCS storage client, which will pull
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// credentials from GOOGLE_APPLICATION_CREDENTIALS if specified.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;ctx&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;context&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Background&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;()&lt;/span&gt;
 &lt;span style=&#34;color:#000&#34;&gt;client&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;storage&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;NewClient&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ctx&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;if&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
   &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatalf&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Unable to initialize storage client: %v&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;

 &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;HandleFunc&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;func&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ResponseWriter&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;r&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;*&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Request&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
   &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// This GCS bucket has been configured so that any authenticated
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;   &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// user can access it (Read Only), so any Service Account can
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;   &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// run this sample.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;   &lt;span style=&#34;color:#000&#34;&gt;bkt&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;client&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Bucket&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;knative-secrets-sample&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;

   &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// Access the attributes of this GCS bucket, and write it back to the
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;   &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;// user.  On failure, return a 500 and the error message.
&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;&lt;/span&gt;   &lt;span style=&#34;color:#000&#34;&gt;attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;bkt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ctx&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
   &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;if&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;!=&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
     &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Error&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;err&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Error&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(),&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;StatusInternalServerError&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
     &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;return&lt;/span&gt;
   &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
   &lt;span style=&#34;color:#000&#34;&gt;fmt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fprintln&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;w&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
     &lt;span style=&#34;color:#000&#34;&gt;fmt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Sprintf&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;bucket %s, created at %s, is located in %s with storage class %s\n&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt;
       &lt;span style=&#34;color:#000&#34;&gt;attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Created&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Location&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;attrs&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;StorageClass&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;))&lt;/span&gt;

 &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;})&lt;/span&gt;

 &lt;span style=&#34;color:#000&#34;&gt;port&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;:=&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;os&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Getenv&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;PORT&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;)&lt;/span&gt;
 &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;if&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;port&lt;/span&gt; &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;==&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;{&lt;/span&gt;
   &lt;span style=&#34;color:#000&#34;&gt;port&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;=&lt;/span&gt; &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;8080&amp;#34;&lt;/span&gt;
 &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;

 &lt;span style=&#34;color:#000&#34;&gt;log&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Fatal&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;http&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;ListenAndServe&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;fmt&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;.&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Sprintf&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;(&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;:%s&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;,&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;port&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;),&lt;/span&gt; &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;nil&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;))&lt;/span&gt;
&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;In your project directory, create a file named &lt;code&gt;Dockerfile&lt;/code&gt; and copy the code
block below into it. For detailed instructions on dockerizing a Go app, see
&lt;a href=&#34;https://blog.golang.org/docker&#34;&gt;Deploying Go servers with Docker&lt;/a&gt;.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-docker&#34; data-lang=&#34;docker&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use the official Golang image to create a build artifact.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This is based on Debian and sets the GOPATH to /go.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://hub.docker.com/_/golang&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; golang as builder&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy local code to the container image.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;WORKDIR&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; /go/src/github.com/knative/docs/hellosecrets&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; . .&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the output command inside the container.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;CGO_ENABLED&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;0&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;GOOS&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;linux go build -v -o hellosecrets&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Use a Docker multi-stage build to create a lean production image.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;FROM&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt; alpine&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Enable the use of outbound https&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;RUN&lt;/span&gt; apk add --no-cache ca-certificates&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Copy the binary to the production image from the builder stage.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;COPY&lt;/span&gt; --from&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;builder /go/src/github.com/knative/docs/hellosecrets/hellosecrets /hellosecrets&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Service must listen to $PORT environment variable.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This default value facilitates local development.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;ENV&lt;/span&gt; PORT &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;8080&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Run the web service on container startup.&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;CMD&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;[&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;/hellosecrets&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;]&lt;/span&gt;&lt;span style=&#34;color:#a40000&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;&lt;a href=&#34;https://cloud.google.com/iam/docs/creating-managing-service-accounts&#34;&gt;Create a new Google Service Account&lt;/a&gt;.
This Service Account doesn&amp;rsquo;t need any privileges, the GCS bucket has been
configured so that any authenticated identity may read it.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;gcloud iam service-accounts create knative-secrets
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a new JSON key for this account&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;gcloud iam service-accounts keys create robot.json &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt; --iam-account&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;knative-secrets@&lt;span style=&#34;color:#000&#34;&gt;$PROJECT_ID&lt;/span&gt;.iam.gserviceaccount.com
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a new Kubernetes secret from this JSON key:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl create secret generic google-robot-secret --from-file&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;./robot.json
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You can achieve a similar result by editting &lt;code&gt;secret.yaml&lt;/code&gt;, copying the
contents of &lt;code&gt;robot.json&lt;/code&gt; as instructed there, and running
&lt;code&gt;kubectl apply --filename secret.yaml&lt;/code&gt;.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Create a new file, &lt;code&gt;service.yaml&lt;/code&gt; and copy the following service definition
into the file. Make sure to replace &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub
username.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Service&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;secrets-go&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Replace {username} with your DockerHub username&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;docker.io/{username}/secrets-go&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;env&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This directs the Google Cloud SDK to use the identity and project&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# defined by the Service Account (aka robot) in the JSON file at&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# this path.&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;#  - `/var/secret` is determined by the `volumeMounts[0].mountPath`&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;#   below. This can be changed if both places are changed.&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;#  - `robot.json` is determined by the &amp;#34;key&amp;#34; that is used to hold the&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;#   secret content in the Kubernetes secret.  This can be changed&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;#   if both places are changed.&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;GOOGLE_APPLICATION_CREDENTIALS&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;value&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;/var/secret/robot.json&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This section specified where in the container we want the&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# volume containing our secret to be mounted.&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;volumeMounts&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;robot-secret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;mountPath&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;/var/secret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# This section attaches the secret &amp;#34;google-robot-secret&amp;#34; to&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# the Pod holding the user container.&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;volumes&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;robot-secret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;secret&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;secretName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;google-robot-secret&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;building-and-deploying-the-sample&#34;&gt;Building and deploying the sample&lt;/h2&gt;
&lt;p&gt;Once you have recreated the sample code files (or used the files in the sample
folder) you&amp;rsquo;re ready to build and deploy the sample app.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Use Docker to build the sample code into a container. To build and push with
Docker Hub, run these commands replacing &lt;code&gt;{username}&lt;/code&gt; with your Docker Hub
username:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Build the container on your local machine&lt;/span&gt;
docker build -t &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/secrets-go .

&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Push the container to docker registry&lt;/span&gt;
docker push &lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;{&lt;/span&gt;username&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;}&lt;/span&gt;/secrets-go
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;After the build has completed and the container is pushed to docker hub, you
can deploy the app into your cluster. Ensure that the container image value
in &lt;code&gt;service.yaml&lt;/code&gt; matches the container you built in the previous step. Apply
the configuration using &lt;code&gt;kubectl&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename service.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Now that your service is created, Knative will perform the following steps:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Create a new immutable revision for this version of the app.&lt;/li&gt;
&lt;li&gt;Network programming to create a route, ingress, service, and load balance
for your app.&lt;/li&gt;
&lt;li&gt;Automatically scale your pods up and down (including to zero active pods).&lt;/li&gt;
&lt;/ul&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Run the following command to find the domain URL for your service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc secrets-go  --output&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;custom-columns&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;NAME:.metadata.name,URL:.status.url
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Example:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;NAME             URL
secrets-go       http://secrets-go.default.1.2.3.4.xip.io
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Now you can make a request to your app and see the result. Replace
the URL below with the URL returned in the previous command.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl http://secrets-go.default.1.2.3.4.xip.io
bucket knative-secrets-sample, created at 2019-02-01 14:44:05.804 +0000 UTC, is located in US with storage class MULTI_REGIONAL
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;blockquote&gt;
&lt;p&gt;Note: Add &lt;code&gt;-v&lt;/code&gt; option to get more detail if the &lt;code&gt;curl&lt;/code&gt; command failed.&lt;/p&gt;
&lt;/blockquote&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;h2 id=&#34;removing-the-sample-app-deployment&#34;&gt;Removing the sample app deployment&lt;/h2&gt;
&lt;p&gt;To remove the sample app from your cluster, delete the service record:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename service.yaml
kubectl delete secret google-robot-secret
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Tag Header Based Routing</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/tag-header-based-routing/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/tag-header-based-routing/</guid>
      <description>
        
        
        &lt;p&gt;This sample explains the use of tag header based routing.&lt;/p&gt;
&lt;h2 id=&#34;tag-header-based-routing-feature&#34;&gt;Tag Header Based Routing Feature&lt;/h2&gt;
&lt;p&gt;Tag header based routing allows users to send requests directly to specific tagged revisions with
the same URL of Knative Service. To do this, you must set the specific header &lt;code&gt;Knative-Serving-Tag: {revision-tag}&lt;/code&gt; in the request.&lt;/p&gt;
&lt;p&gt;Currently Istio, Contour and Kourier ingress support this feature.&lt;/p&gt;
&lt;h2 id=&#34;prerequestie&#34;&gt;Prerequestie&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;A Knative cluster that has an ingress controller installed
with Knative version 0.16 and above.&lt;/p&gt;
&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Move into the docs directory:&lt;/p&gt;
&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;$GOPATH&lt;/span&gt;/src/github.com/knative/docs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;enabling-tag-header-based-routing&#34;&gt;Enabling tag header based routing&lt;/h2&gt;
&lt;p&gt;This feature is disabled by default. To enable this feature, run the following command:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl patch cm config-features -n knative-serving -p &#39;{&amp;quot;data&amp;quot;:{&amp;quot;tag-header-based-routing&amp;quot;:&amp;quot;Enabled&amp;quot;}}&#39;
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;build-images&#34;&gt;Build images&lt;/h2&gt;
&lt;p&gt;Follow the instructions in &lt;a href=&#34;../hello-world/helloworld-go&#34;&gt;helloworld-go&lt;/a&gt; to build the &lt;code&gt;helloworld&lt;/code&gt; image and upload it
to your container repository.&lt;/p&gt;
&lt;p&gt;Replace &lt;code&gt;{username}&lt;/code&gt; in the &lt;a href=&#34;./sample.yaml&#34;&gt;sample.yaml&lt;/a&gt; with your Docker Hub username.&lt;/p&gt;
&lt;h2 id=&#34;setting-up-the-revisions-with-tag&#34;&gt;Setting up the revisions with tag&lt;/h2&gt;
&lt;p&gt;In this sample, two Revisions are created. The first Revision is tagged with &lt;code&gt;rev1&lt;/code&gt;.
With this configuration, users can send requests directly to the first Revision
using the URL of Knative Service plus the header &lt;code&gt;Knative-Serving-Tag: rev1&lt;/code&gt;.&lt;/p&gt;
&lt;p&gt;The Knative Service is configured to route all of the traffic to the second Revision, which means if users do not
provide the &lt;code&gt;Knative-Serving-Tag&lt;/code&gt; or they provide an incorrect value for &lt;code&gt;Knative-Serving-Tag&lt;/code&gt;, the requests will be
routed to the second Revision.&lt;/p&gt;
&lt;p&gt;Run the following command to set up the Knative Service and Revisions.&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl apply -f docs/serving/samples/tag-header-based-routing/sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;check-the-created-resources&#34;&gt;Check the created resources&lt;/h2&gt;
&lt;p&gt;Check the two created Revisions using the following command&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl get revisions
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;You should see there are two Revisions: &lt;code&gt;tag-header-revision-1&lt;/code&gt; and &lt;code&gt;tag-header-revision-2&lt;/code&gt;. It may take a few minutes
for the Revisions to become ready.&lt;/p&gt;
&lt;p&gt;Check the Knative Service using the following command&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl get ksvc tag-header -oyaml
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;You should see the following block which indicates the tag &lt;code&gt;rev1&lt;/code&gt; is successfully added to the first Revision.&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;  - revisionName: tag-header-revision-1
    percent: 0
    tag: rev1
  - revisionName: tag-header-revision-2
    percent: 100
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;sending-request-with-tag-header&#34;&gt;Sending request with tag header&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;
&lt;p&gt;Run the following command to send a request to the first Revision.&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;curl ${INGRESS_IP} -H &amp;quot;Host:tag-header.default.example.com&amp;quot; -H &amp;quot;Knative-Serving-Tag:rev1&amp;quot;
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;where &lt;code&gt;${INGRESS_IP}&lt;/code&gt; is the IP of your ingress.&lt;/p&gt;
&lt;p&gt;You should get the following response:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;Hello First Revision!
&lt;/code&gt;&lt;/pre&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Run the following command to send requests without the &lt;code&gt;Knative-Serving-Tag&lt;/code&gt; header:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;curl ${INGRESS_IP} -H &amp;quot;Host:tag-header.default.example.com&amp;quot;
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;You should get the response from the second Revision:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;Hello Second Revision!
&lt;/code&gt;&lt;/pre&gt;&lt;/li&gt;
&lt;li&gt;
&lt;p&gt;Run the following command to send requests with an incorrect &lt;code&gt;Knative-Serving-Tag&lt;/code&gt; header:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;curl ${INGRESS_IP} -H &amp;quot;Host:tag-header.default.example.com&amp;quot; -H &amp;quot;Knative-Serving-Tag:wrongHeader&amp;quot;
&lt;/code&gt;&lt;/pre&gt;&lt;p&gt;You should get the response from the second Revision:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;Hello Second Revision!
&lt;/code&gt;&lt;/pre&gt;&lt;/li&gt;
&lt;/ol&gt;

      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Simple Traffic Splitting Between Revisions</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/traffic-splitting/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/traffic-splitting/</guid>
      <description>
        
        
        &lt;p&gt;This samples builds off of the &lt;a href=&#34;../rest-api-go&#34;&gt;Creating a RESTful Service&lt;/a&gt;
sample to illustrate updating a Service to create a new Revision as well as
splitting traffic between the two created Revisions.&lt;/p&gt;
&lt;h2 id=&#34;prerequisites&#34;&gt;Prerequisites&lt;/h2&gt;
&lt;ol&gt;
&lt;li&gt;Complete the Service creation steps in
&lt;a href=&#34;../rest-api-go&#34;&gt;Creating a RESTful Service&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;Move into the docs directory:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#204a87&#34;&gt;cd&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;$GOPATH&lt;/span&gt;/src/github.com/knative/docs
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;using-the-traffic-block&#34;&gt;Using the &lt;code&gt;traffic:&lt;/code&gt; block&lt;/h2&gt;
&lt;p&gt;The service was originally created without a &lt;code&gt;traffic:&lt;/code&gt; block, which means that
it will automatically deploy the latest updates as they become ready. To split
traffic between multiple Revisions, we will start to use a customized &lt;code&gt;traffic:&lt;/code&gt;
block. The &lt;code&gt;traffic:&lt;/code&gt; block enables users to split traffic over any number of
fixed Revisions, or the floating &amp;ldquo;latest revision&amp;rdquo; for the Service. It also
enables users to name the specific sub-routes, so that they can be directly
addressed for qualification or debugging.&lt;/p&gt;
&lt;p&gt;The first thing we will do is look at the traffic block that was defaulted for
us in the previous sample:&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;Fetch the state of the Service, and note the &lt;code&gt;traffic:&lt;/code&gt; block that will run
the latest ready revision, each time we update our template. Also note that
under &lt;code&gt;status:&lt;/code&gt; we see a specific &lt;code&gt;revisionName:&lt;/code&gt; here, which is what it has
resolved to (in this case the name we asked for).&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;$ kubectl get ksvc -oyaml stock-service-example
apiVersion: serving.knative.dev/v1
kind: Service
metadata:
  name: stock-service-example
  ...
spec:
  template: ... &lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# A defaulted version of what we provided.&lt;/span&gt;

  traffic:
  - latestRevision: &lt;span style=&#34;color:#204a87&#34;&gt;true&lt;/span&gt;
    percent: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;100&lt;/span&gt;

status:
  ...
  traffic:
  - percent: &lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;100&lt;/span&gt;
    revisionName: stock-service-example-first
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol&gt;
&lt;li&gt;The &lt;code&gt;release_sample.yaml&lt;/code&gt; in this directory overwrites the defaulted traffic
block with a block that fixes traffic to the revision
&lt;code&gt;stock-service-example-first&lt;/code&gt;, while keeping the latest ready revision
available via the sub-route &amp;ldquo;latest&amp;rdquo;.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename docs/serving/samples/traffic-splitting/release_sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol&gt;
&lt;li&gt;The &lt;code&gt;spec&lt;/code&gt; of the Service should now show our &lt;code&gt;traffic&lt;/code&gt; block with the
Revision name we specified above.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc stock-service-example --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;updating-the-service&#34;&gt;Updating the Service&lt;/h2&gt;
&lt;p&gt;This section describes how to create a new Revision by updating your Service.&lt;/p&gt;
&lt;p&gt;A new Revision is created every time a value in the &lt;code&gt;template&lt;/code&gt; section of the
Service &lt;code&gt;spec&lt;/code&gt; is updated. The &lt;code&gt;updated_sample.yaml&lt;/code&gt; in this folder changes the
environment variable &lt;code&gt;RESOURCE&lt;/code&gt; from &lt;code&gt;stock&lt;/code&gt; to &lt;code&gt;share&lt;/code&gt;. Applying this change
will result in a new Revision.&lt;/p&gt;
&lt;p&gt;For comparison, you can diff the &lt;code&gt;release_sample.yaml&lt;/code&gt; with the
&lt;code&gt;updated_sample.yaml&lt;/code&gt;.&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;diff serving/samples/traffic-splitting/release_sample.yaml &lt;span style=&#34;color:#4e9a06&#34;&gt;\
&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&lt;/span&gt;serving/samples/traffic-splitting/updated_sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol&gt;
&lt;li&gt;Execute the command below to update Service, resulting in a new Revision.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename docs/serving/samples/traffic-splitting/updated_sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;With our &lt;code&gt;traffic&lt;/code&gt; block, traffic will &lt;em&gt;not&lt;/em&gt; shift to the new Revision
automatically. However, it will be available via the URL associated with our
&lt;code&gt;latest&lt;/code&gt; sub-route. This can be verified through the Service status, by
finding the entry of &lt;code&gt;status.traffic&lt;/code&gt; for &lt;code&gt;latest&lt;/code&gt;:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc stock-service-example --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;The readiness of the Service can be verified through the Service Conditions.
When the Service conditions report it is ready again, you can access the new
Revision using the same method as found in the
&lt;a href=&#34;../rest-api-go/index.html#access-the-service&#34;&gt;previous sample&lt;/a&gt; using the
Service hostname found above.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Replace &amp;#34;latest&amp;#34; with whichever tag for which we want the hostname.&lt;/span&gt;
&lt;span style=&#34;color:#204a87&#34;&gt;export&lt;/span&gt; &lt;span style=&#34;color:#000&#34;&gt;LATEST_HOSTNAME&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;kubectl get ksvc stock-service-example --output &lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{.status.traffic[?(@.tag==&amp;#39;latest&amp;#39;)].url}&amp;#34;&lt;/span&gt; &lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;|&lt;/span&gt; cut -d&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;/&amp;#39;&lt;/span&gt; -f 3&lt;span style=&#34;color:#4e9a06&#34;&gt;`&lt;/span&gt;
curl --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host: &lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;LATEST_HOSTNAME&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&lt;/span&gt; http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;INGRESS_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ul&gt;
&lt;li&gt;Visiting the Service&amp;rsquo;s domain will still hit the original Revision, since we
configured it to receive 100% of our main traffic (you can also use the
&lt;code&gt;current&lt;/code&gt; sub-route).&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host:&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;SERVICE_HOSTNAME&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&lt;/span&gt; http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;INGRESS_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;traffic-splitting&#34;&gt;Traffic Splitting&lt;/h2&gt;
&lt;p&gt;Updating the service to split traffic between the two revisions is done by
extending our &lt;code&gt;traffic&lt;/code&gt; list, and splitting the &lt;code&gt;percent&lt;/code&gt; across them.&lt;/p&gt;
&lt;ol&gt;
&lt;li&gt;Execute the command below to update Service, resulting in a 50/50 traffic
split.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl apply --filename docs/serving/samples/traffic-splitting/split_sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;2&#34;&gt;
&lt;li&gt;Verify the deployment by checking the service status:&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl get ksvc --output yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;ol start=&#34;3&#34;&gt;
&lt;li&gt;Once updated, &lt;code&gt;curl&lt;/code&gt; requests to the base domain should result in responses
split evenly between &lt;code&gt;Welcome to the share app!&lt;/code&gt; and
&lt;code&gt;Welcome to the stock app!&lt;/code&gt;.&lt;/li&gt;
&lt;/ol&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;curl --header &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;Host:&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;SERVICE_HOSTNAME&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;&lt;/span&gt; http://&lt;span style=&#34;color:#4e9a06&#34;&gt;${&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;INGRESS_IP&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;}&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;h2 id=&#34;clean-up&#34;&gt;Clean Up&lt;/h2&gt;
&lt;p&gt;To clean up the sample service:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-shell&#34; data-lang=&#34;shell&#34;&gt;kubectl delete --filename docs/serving/samples/traffic-splitting/split_sample.yaml
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;
      </description>
    </item>
    
    <item>
      <title>V0.21-Docs: Routing and managing traffic with blue/green deployment</title>
      <link>https://knative.dev/v0.21-docs/serving/samples/blue-green-deployment/</link>
      <pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate>
      
      <guid>https://knative.dev/v0.21-docs/serving/samples/blue-green-deployment/</guid>
      <description>
        
        
        &lt;p&gt;This sample demonstrates updating an application to a new version using a
blue/green traffic routing pattern. With Knative, you can safely reroute traffic
from a live version of an application to a new version by changing the routing
configuration.&lt;/p&gt;
&lt;h2 id=&#34;before-you-begin&#34;&gt;Before you begin&lt;/h2&gt;
&lt;p&gt;You need:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;A Kubernetes cluster with &lt;a href=&#34;../../../install/index.html&#34;&gt;Knative installed&lt;/a&gt;.&lt;/li&gt;
&lt;li&gt;(Optional) &lt;a href=&#34;../../using-a-custom-domain&#34;&gt;A custom domain configured&lt;/a&gt; for use
with Knative.&lt;/li&gt;
&lt;/ul&gt;
&lt;p&gt;Note: The source code for the gcr.io/knative-samples/knative-route-demo image
that is used in this sample, is located at
&lt;a href=&#34;https://github.com/mchmarny/knative-route-demo&#34;&gt;https://github.com/mchmarny/knative-route-demo&lt;/a&gt;.&lt;/p&gt;
&lt;h2 id=&#34;deploying-revision-1-blue&#34;&gt;Deploying Revision 1 (Blue)&lt;/h2&gt;
&lt;p&gt;We&amp;rsquo;ll be deploying an image of a sample application that displays the text &amp;ldquo;App
v1&amp;rdquo; on a blue background.&lt;/p&gt;
&lt;p&gt;First, create a new file called &lt;code&gt;blue-green-demo-config.yaml&lt;/code&gt;and copy this into
it:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Configuration&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;gcr.io/knative-samples/knative-route-demo:blue&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# The URL to the sample app docker image&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;env&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;T_VERSION&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;value&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Save the file, then deploy the configuration to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-config.yaml

configuration &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;This will deploy the initial revision of the sample application. Before we can
route traffic to this application we need to know the name of the initial
revision which was just created. Using &lt;code&gt;kubectl&lt;/code&gt; you can get it with the
following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl get configurations blue-green-demo -o&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{.status.latestCreatedRevisionName}&amp;#39;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;The command above will return the name of the revision, it will be similar to
&lt;code&gt;blue-green-demo-lcfrd&lt;/code&gt;. In the rest of this document we will use this revision
name, but yours will be different.&lt;/p&gt;
&lt;p&gt;To route inbound traffic to it, we need to define a route. Create a new file
called &lt;code&gt;blue-green-demo-route.yaml&lt;/code&gt; and copy the following YAML manifest into it
(do not forget to edit the revision name):&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# The name of our route; appears in the URL to access the app&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# The namespace we&amp;#39;re working in; also appears in the URL to access the app&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;traffic&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-lcfrd&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;100&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# All traffic goes to this revision&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Save the file, then apply the route to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-route.yaml

route &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;You&amp;rsquo;ll now be able to view the sample app at the URL shown by:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl get route blue-green-demo
&lt;/code&gt;&lt;/pre&gt;&lt;h2 id=&#34;deploying-revision-2-green&#34;&gt;Deploying Revision 2 (Green)&lt;/h2&gt;
&lt;p&gt;Revision 2 of the sample application will display the text &amp;ldquo;App v2&amp;rdquo; on a green
background. To create the new revision, we&amp;rsquo;ll edit our existing configuration in
&lt;code&gt;blue-green-demo-config.yaml&lt;/code&gt; with an updated image and environment variables:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Configuration&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Configuration name is unchanged, since we&amp;#39;re updating an existing Configuration&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;template&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;containers&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;        &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;image&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;gcr.io/knative-samples/knative-route-demo:green&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# URL to the new version of the sample app docker image&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;          &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;env&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;            &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;T_VERSION&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;              &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;value&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;green&amp;#34;&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Updated value for the T_VERSION environment variable&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Save the file, then apply the updated configuration to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-config.yaml

configuration &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Find the name of the second revision with the following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl get configurations blue-green-demo -o&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#39;{.status.latestCreatedRevisionName}&amp;#39;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;In the rest of this document we will assume that the second revision is called
&lt;code&gt;blue-green-demo-m9548&lt;/code&gt;, however yours will differ. Make sure to use the correct
name of the second revision in the manifests that follow.&lt;/p&gt;
&lt;p&gt;At this point, the first revision (&lt;code&gt;blue-green-demo-lcfrd&lt;/code&gt;) and the second
revision (&lt;code&gt;blue-green-demo-m9548&lt;/code&gt;) will both be deployed and running. We can
update our existing route to create a new (test) endpoint for the second
revision while still sending all other traffic to the first revision. Edit
&lt;code&gt;blue-green-demo-route.yaml&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Route name is unchanged, since we&amp;#39;re updating an existing Route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;traffic&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-lcfrd&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;100&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# All traffic still going to the first revision&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-m9548&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;0&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# 0% of traffic routed to the second revision&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;tag&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;v2&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# A named route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Save the file, then apply the updated route to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-route.yaml

route &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Revision 2 of the app is staged at this point. That means:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;No traffic will be routed to revision 2 at the main URL,
&lt;code&gt;http://blue-green-demo.default.[YOUR_CUSTOM_DOMAIN].com&lt;/code&gt;&lt;/li&gt;
&lt;li&gt;Knative creates a new route named v2 for testing the newly deployed version.
The URL of this can be seen in the status section of your Route.&lt;/li&gt;
&lt;/ul&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl get route blue-green-demo --output &lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{.status.traffic[*].url}&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;This allows you to validate that the new version of the app is behaving as
expected before switching any traffic over to it.&lt;/p&gt;
&lt;h2 id=&#34;migrating-traffic-to-the-new-revision&#34;&gt;Migrating traffic to the new revision&lt;/h2&gt;
&lt;p&gt;We&amp;rsquo;ll once again update our existing route to begin shifting traffic away from
the first revision and toward the second. Edit &lt;code&gt;blue-green-demo-route.yaml&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Updating our existing route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;traffic&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-lcfrd&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;50&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Updating the percentage from 100 to 50&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-m9548&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;50&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Updating the percentage from 0 to 50&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;tag&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;v2&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Save the file, then apply the updated route to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-route.yaml

route &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Refresh the original route
(&lt;code&gt;http://blue-green-demo.default.[YOUR_CUSTOM_DOMAIN].com&lt;/code&gt;) a few times to see that
some traffic now goes to version 2 of the app.&lt;/p&gt;
&lt;blockquote&gt;
&lt;p&gt;Note: This sample shows a 50/50 split to assure you don&amp;rsquo;t have to refresh too
much, but it&amp;rsquo;s recommended to start with 1-2% of traffic in a production
environment&lt;/p&gt;
&lt;/blockquote&gt;
&lt;h2 id=&#34;rerouting-all-traffic-to-the-new-version&#34;&gt;Rerouting all traffic to the new version&lt;/h2&gt;
&lt;p&gt;Lastly, we&amp;rsquo;ll update our existing route to finally shift all traffic to the
second revision. Edit &lt;code&gt;blue-green-demo-route.yaml&lt;/code&gt;:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-yaml&#34; data-lang=&#34;yaml&#34;&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;apiVersion&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;serving.knative.dev/v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;kind&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;Route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;metadata&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;name&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Updating our existing route&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;namespace&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;default&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;&lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;spec&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;  &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;traffic&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-lcfrd&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;0&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;tag&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Adding a new named route for v1&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;    &lt;/span&gt;- &lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;revisionName&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#000&#34;&gt;blue-green-demo-m9548&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#204a87;font-weight:bold&#34;&gt;percent&lt;/span&gt;&lt;span style=&#34;color:#000;font-weight:bold&#34;&gt;:&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt; &lt;/span&gt;&lt;span style=&#34;color:#0000cf;font-weight:bold&#34;&gt;100&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;      &lt;/span&gt;&lt;span style=&#34;color:#8f5902;font-style:italic&#34;&gt;# Named route for v2 has been removed, since we don&amp;#39;t need it anymore&lt;/span&gt;&lt;span style=&#34;color:#f8f8f8;text-decoration:underline&#34;&gt;
&lt;/span&gt;&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;blockquote&gt;
&lt;p&gt;Note: You can remove the first revision blue-green-demo-lcfrd instead of 0% of traffic
when you will not roll back the revision anymore.
Then the non-routeable revision object will be garbage collected.&lt;/p&gt;
&lt;/blockquote&gt;
&lt;p&gt;Save the file, then apply the updated route to your cluster:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl apply --filename blue-green-demo-route.yaml

route &lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;blue-green-demo&amp;#34;&lt;/span&gt; configured
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;Refresh the original route
(&lt;code&gt;http://blue-green-demo.default.[YOUR_CUSTOM_DOMAIN].com&lt;/code&gt;) a few times to verify
that no traffic is being routed to v1 of the app.&lt;/p&gt;
&lt;p&gt;We added a named route to v1 of the app, so you can now access it at the URL
listed in the traffic block of the status section. To get the URL, enter the
following command:&lt;/p&gt;
&lt;div class=&#34;highlight&#34;&gt;&lt;pre style=&#34;background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4&#34;&gt;&lt;code class=&#34;language-bash&#34; data-lang=&#34;bash&#34;&gt;kubectl get route blue-green-demo --output &lt;span style=&#34;color:#000&#34;&gt;jsonpath&lt;/span&gt;&lt;span style=&#34;color:#ce5c00;font-weight:bold&#34;&gt;=&lt;/span&gt;&lt;span style=&#34;color:#4e9a06&#34;&gt;&amp;#34;{.status.traffic[*].url}&amp;#34;&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;&lt;p&gt;With all inbound traffic being directed to the second revision of the
application, Knative will soon scale the first revision down to 0 running pods
and the blue/green deployment can be considered complete. Using the named &lt;code&gt;v1&lt;/code&gt;
route will reactivate a pod to serve any occasional requests intended
specifically for the initial revision.&lt;/p&gt;
&lt;h2 id=&#34;cleaning-up&#34;&gt;Cleaning up&lt;/h2&gt;
&lt;p&gt;To delete the sample app, enter the following commands:&lt;/p&gt;
&lt;pre&gt;&lt;code&gt;kubectl delete route blue-green-demo
kubectl delete configuration blue-green-demo
&lt;/code&gt;&lt;/pre&gt;
      </description>
    </item>
    
  </channel>
</rss>