1524 lines
38 KiB
HTML
1524 lines
38 KiB
HTML
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<link rel="canonical" href="https://kubernetes.github.io/ingress-nginx/user-guide/third-party-addons/opentracing/">
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<title>OpenTracing - NGINX Ingress Controller</title>
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<svg xmlns="http://www.w3.org/2000/svg" width="416" height="448" viewBox="0 0 416 448" id="__github"><path fill="currentColor" d="M160 304q0 10-3.125 20.5t-10.75 19T128 352t-18.125-8.5-10.75-19T96 304t3.125-20.5 10.75-19T128 256t18.125 8.5 10.75 19T160 304zm160 0q0 10-3.125 20.5t-10.75 19T288 352t-18.125-8.5-10.75-19T256 304t3.125-20.5 10.75-19T288 256t18.125 8.5 10.75 19T320 304zm40 0q0-30-17.25-51T296 232q-10.25 0-48.75 5.25Q229.5 240 208 240t-39.25-2.75Q130.75 232 120 232q-29.5 0-46.75 21T56 304q0 22 8 38.375t20.25 25.75 30.5 15 35 7.375 37.25 1.75h42q20.5 0 37.25-1.75t35-7.375 30.5-15 20.25-25.75T360 304zm56-44q0 51.75-15.25 82.75-9.5 19.25-26.375 33.25t-35.25 21.5-42.5 11.875-42.875 5.5T212 416q-19.5 0-35.5-.75t-36.875-3.125-38.125-7.5-34.25-12.875T37 371.5t-21.5-28.75Q0 312 0 260q0-59.25 34-99-6.75-20.5-6.75-42.5 0-29 12.75-54.5 27 0 47.5 9.875t47.25 30.875Q171.5 96 212 96q37 0 70 8 26.25-20.5 46.75-30.25T376 64q12.75 25.5 12.75 54.5 0 21.75-6.75 42 34 40 34 99.5z"/></svg>
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<a href="#opentracing" tabindex="1" class="md-skip">
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<nav class="md-header-nav md-grid">
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<div class="md-flex">
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<div class="md-flex__cell md-flex__cell--shrink">
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<a href="https://kubernetes.github.io/ingress-nginx" title="NGINX Ingress Controller" class="md-header-nav__button md-logo">
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<i class="md-icon">public</i>
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</a>
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<div class="md-flex__ellipsis md-header-nav__title" data-md-component="title">
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<span class="md-header-nav__topic">
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NGINX Ingress Controller
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</span>
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<span class="md-header-nav__topic">
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OpenTracing
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</span>
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<div class="md-flex__cell md-flex__cell--shrink">
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
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kubernetes/ingress-nginx
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User guide
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<i class="md-icon">public</i>
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</a>
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<div class="md-nav__source">
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<a href="https://github.com/kubernetes/ingress-nginx/" title="Go to repository" class="md-source" data-md-source="github">
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</svg>
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</div>
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<div class="md-source__repository">
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kubernetes/ingress-nginx
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</a>
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Welcome
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Welcome
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<a href="../../../how-it-works/" title="How it works" class="md-nav__link">
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How it works
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Troubleshooting
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<a href="../../../kubectl-plugin/" title="kubectl plugin" class="md-nav__link">
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kubectl plugin
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Development
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Deployment
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Deployment
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<a href="../../../deploy/" title="Installation Guide" class="md-nav__link">
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Installation Guide
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</a>
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<li class="md-nav__item">
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<a href="../../../deploy/baremetal/" title="Bare-metal considerations" class="md-nav__link">
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Bare-metal considerations
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</a>
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<li class="md-nav__item">
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<a href="../../../deploy/rbac/" title="Role Based Access Control (RBAC)" class="md-nav__link">
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Role Based Access Control (RBAC)
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</a>
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<li class="md-nav__item">
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<a href="../../../deploy/validating-webhook/" title="Validating Webhook (admission controller)" class="md-nav__link">
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Validating Webhook (admission controller)
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../../deploy/upgrade/" title="Upgrade" class="md-nav__link">
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Upgrade
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</a>
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</ul>
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</nav>
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<li class="md-nav__item md-nav__item--active md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-3" type="checkbox" id="nav-3" checked>
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<label class="md-nav__link" for="nav-3">
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User guide
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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<label class="md-nav__title" for="nav-3">
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User guide
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item md-nav__item--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-3-1" type="checkbox" id="nav-3-1">
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<label class="md-nav__link" for="nav-3-1">
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NGINX Configuration
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</label>
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<nav class="md-nav" data-md-component="collapsible" data-md-level="2">
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<label class="md-nav__title" for="nav-3-1">
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NGINX Configuration
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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<li class="md-nav__item">
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<a href="../../nginx-configuration/" title="Introduction" class="md-nav__link">
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Introduction
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../basic-usage/" title="Basic usage" class="md-nav__link">
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Basic usage
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</a>
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<li class="md-nav__item">
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<a href="../../nginx-configuration/annotations/" title="Annotations" class="md-nav__link">
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Annotations
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</a>
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<li class="md-nav__item">
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<a href="../../nginx-configuration/configmap/" title="ConfigMap" class="md-nav__link">
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ConfigMap
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</a>
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<li class="md-nav__item">
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<a href="../../nginx-configuration/custom-template/" title="Custom NGINX template" class="md-nav__link">
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Custom NGINX template
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../nginx-configuration/log-format/" title="Log format" class="md-nav__link">
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Log format
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</a>
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<div class="md-content">
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<article class="md-content__inner md-typeset">
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<a href="https://github.com/kubernetes/ingress-nginx/edit/master/docs/user-guide/third-party-addons/opentracing.md" title="Edit this page" class="md-icon md-content__icon"></a>
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<h1 id="opentracing">OpenTracing<a class="headerlink" href="#opentracing" title="Permanent link"> ¶</a></h1>
|
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<p>Enables requests served by NGINX for distributed tracing via The OpenTracing Project.</p>
|
|
<p>Using the third party module <a href="https://github.com/opentracing-contrib/nginx-opentracing">opentracing-contrib/nginx-opentracing</a> the NGINX ingress controller can configure NGINX to enable <a href="http://opentracing.io">OpenTracing</a> instrumentation.
|
|
By default this feature is disabled.</p>
|
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<h2 id="usage">Usage<a class="headerlink" href="#usage" title="Permanent link"> ¶</a></h2>
|
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<p>To enable the instrumentation we must enable OpenTracing in the configuration ConfigMap:
|
|
<div class="codehilite"><pre><span></span><span class="n">data</span><span class="o">:</span>
|
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<span class="n">enable</span><span class="o">-</span><span class="n">opentracing</span><span class="o">:</span> <span class="s2">"true"</span>
|
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</pre></div></p>
|
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<p>We must also set the host to use when uploading traces:</p>
|
|
<p><div class="codehilite"><pre><span></span>zipkin-collector-host: zipkin.default.svc.cluster.local
|
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jaeger-collector-host: jaeger-agent.default.svc.cluster.local
|
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datadog-collector-host: datadog-agent.default.svc.cluster.local
|
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</pre></div>
|
|
NOTE: While the option is called <code class="codehilite">jaeger-collector-host</code>, you will need to point this to a <code class="codehilite">jaeger-agent</code>, and not the <code class="codehilite">jaeger-collector</code> component. </p>
|
|
<p>Next you will need to deploy a distributed tracing system which uses OpenTracing.
|
|
<a href="https://github.com/openzipkin/zipkin">Zipkin</a> and
|
|
<a href="https://github.com/jaegertracing/jaeger">Jaeger</a> and
|
|
<a href="https://github.com/DataDog/dd-opentracing-cpp">Datadog</a>
|
|
have been tested.</p>
|
|
<p>Other optional configuration options:
|
|
<div class="codehilite"><pre><span></span># specifies the port to use when uploading traces, Default: 9411
|
|
zipkin-collector-port
|
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|
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# specifies the service name to use for any traces created, Default: nginx
|
|
zipkin-service-name
|
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|
|
# specifies sample rate for any traces created, Default: 1.0
|
|
zipkin-sample-rate
|
|
|
|
# specifies the port to use when uploading traces, Default: 6831
|
|
jaeger-collector-port
|
|
|
|
# specifies the service name to use for any traces created, Default: nginx
|
|
jaeger-service-name
|
|
|
|
# specifies the sampler to be used when sampling traces.
|
|
# The available samplers are: const, probabilistic, ratelimiting, remote, Default: const
|
|
jaeger-sampler-type
|
|
|
|
# specifies the argument to be passed to the sampler constructor, Default: 1
|
|
jaeger-sampler-param
|
|
|
|
# Specifies the custom remote sampler host to be passed to the sampler constructor. Must be a valid URL.
|
|
# Default: http://127.0.0.1
|
|
jaeger-sampler-host
|
|
|
|
# Specifies the custom remote sampler port to be passed to the sampler constructor. Must be a number. Default: 5778
|
|
jaeger-sampler-port
|
|
|
|
# Specifies the header name used for passing trace context. Must be a string. Default: uber-trace-id
|
|
jaeger-trace-context-header-name
|
|
|
|
# Specifies the header name used for force sampling. Must be a string. Default: jaeger-debug-id
|
|
jaeger-debug-header
|
|
|
|
# Specifies the header name used to submit baggage if there is no root span. Must be a string. Default: jaeger-baggage
|
|
jaeger-baggage-header
|
|
|
|
# Specifies the header prefix used to propagate baggage. Must be a string. Default: uberctx-
|
|
jaeger-tracer-baggage-header-prefix
|
|
|
|
# specifies the port to use when uploading traces, Default 8126
|
|
datadog-collector-port
|
|
|
|
# specifies the service name to use for any traces created, Default: nginx
|
|
datadog-service-name
|
|
|
|
# specifies the operation name to use for any traces collected, Default: nginx.handle
|
|
datadog-operation-name-override
|
|
</pre></div></p>
|
|
<p>All these options (including host) allow environment variables, such as <code class="codehilite">$HOSTNAME</code> or <code class="codehilite">$HOST_IP</code>. In the case of Jaeger, if you have a Jaeger agent running on each machine in your cluster, you can use something like <code class="codehilite">$HOST_IP</code> (which can be 'mounted' with the <code class="codehilite">status.hostIP</code> fieldpath, as described <a href="https://kubernetes.io/docs/tasks/inject-data-application/downward-api-volume-expose-pod-information/#capabilities-of-the-downward-api">here</a>) to make sure traces will be sent to the local agent.</p>
|
|
<h2 id="examples">Examples<a class="headerlink" href="#examples" title="Permanent link"> ¶</a></h2>
|
|
<p>The following examples show how to deploy and test different distributed tracing systems. These example can be performed
|
|
using Minikube.</p>
|
|
<h3 id="zipkin">Zipkin<a class="headerlink" href="#zipkin" title="Permanent link"> ¶</a></h3>
|
|
<p>In the <a href="https://github.com/rnburn/zipkin-date-server">rnburn/zipkin-date-server</a>
|
|
GitHub repository is an example of a dockerized date service. To install the example and Zipkin collector run:</p>
|
|
<div class="codehilite"><pre><span></span>kubectl create -f https://raw.githubusercontent.com/rnburn/zipkin-date-server/master/kubernetes/zipkin.yaml
|
|
kubectl create -f https://raw.githubusercontent.com/rnburn/zipkin-date-server/master/kubernetes/deployment.yaml
|
|
</pre></div>
|
|
|
|
<p>Also we need to configure the NGINX controller ConfigMap with the required values:</p>
|
|
<div class="codehilite"><pre><span></span>$ <span class="nb">echo</span> <span class="s1">'</span>
|
|
<span class="s1">apiVersion: v1</span>
|
|
<span class="s1">kind: ConfigMap</span>
|
|
<span class="s1">data:</span>
|
|
<span class="s1"> enable-opentracing: "true"</span>
|
|
<span class="s1"> zipkin-collector-host: zipkin.default.svc.cluster.local</span>
|
|
<span class="s1">metadata:</span>
|
|
<span class="s1"> name: nginx-configuration</span>
|
|
<span class="s1"> namespace: kube-system</span>
|
|
<span class="s1">'</span> <span class="p">|</span> kubectl replace -f -
|
|
</pre></div>
|
|
|
|
<p>In the Zipkin interface we can see the details:
|
|
<img alt="zipkin screenshot" src="../../../images/zipkin-demo.png" title="zipkin collector screenshot" /></p>
|
|
<h3 id="jaeger">Jaeger<a class="headerlink" href="#jaeger" title="Permanent link"> ¶</a></h3>
|
|
<ol>
|
|
<li>
|
|
<p>Enable Ingress addon in Minikube:
|
|
<div class="codehilite"><pre><span></span>$ minikube addons <span class="nb">enable</span> ingress
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>Add Minikube IP to /etc/hosts:
|
|
<div class="codehilite"><pre><span></span>$ <span class="nb">echo</span> <span class="s2">"</span><span class="k">$(</span>minikube ip<span class="k">)</span><span class="s2"> example.com"</span> <span class="p">|</span> sudo tee -a /etc/hosts
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>Apply a basic Service and Ingress Resource:
|
|
<div class="codehilite"><pre><span></span># Create Echoheaders Deployment
|
|
$ kubectl run echoheaders --image=k8s.gcr.io/echoserver:1.4 --replicas=1 --port=8080
|
|
|
|
# Expose as a Cluster-IP
|
|
$ kubectl expose deployment echoheaders --port=80 --target-port=8080 --name=echoheaders-x
|
|
|
|
# Apply the Ingress Resource
|
|
$ echo '
|
|
apiVersion: extensions/v1beta1
|
|
kind: Ingress
|
|
metadata:
|
|
name: echo-ingress
|
|
spec:
|
|
rules:
|
|
- host: example.com
|
|
http:
|
|
paths:
|
|
- backend:
|
|
serviceName: echoheaders-x
|
|
servicePort: 80
|
|
path: /echo
|
|
' | kubectl apply -f -
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>Enable OpenTracing and set the jaeger-collector-host:
|
|
<div class="codehilite"><pre><span></span>$ <span class="nb">echo</span> <span class="s1">'</span>
|
|
<span class="s1"> apiVersion: v1</span>
|
|
<span class="s1"> kind: ConfigMap</span>
|
|
<span class="s1"> data:</span>
|
|
<span class="s1"> enable-opentracing: "true"</span>
|
|
<span class="s1"> jaeger-collector-host: jaeger-agent.default.svc.cluster.local</span>
|
|
<span class="s1"> metadata:</span>
|
|
<span class="s1"> name: nginx-configuration</span>
|
|
<span class="s1"> namespace: kube-system</span>
|
|
<span class="s1"> '</span> <span class="p">|</span> kubectl replace -f -
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>Apply the Jaeger All-In-One Template:
|
|
<div class="codehilite"><pre><span></span>$ kubectl apply -f https://raw.githubusercontent.com/jaegertracing/jaeger-kubernetes/master/all-in-one/jaeger-all-in-one-template.yml
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>Make a few requests to the Service:
|
|
<div class="codehilite"><pre><span></span>$ curl example.com/echo -d <span class="s2">"meow"</span>
|
|
|
|
CLIENT VALUES:
|
|
<span class="nv">client_address</span><span class="o">=</span><span class="m">172</span>.17.0.5
|
|
<span class="nv">command</span><span class="o">=</span>POST
|
|
real <span class="nv">path</span><span class="o">=</span>/echo
|
|
<span class="nv">query</span><span class="o">=</span>nil
|
|
<span class="nv">request_version</span><span class="o">=</span><span class="m">1</span>.1
|
|
<span class="nv">request_uri</span><span class="o">=</span>http://example.com:8080/echo
|
|
|
|
SERVER VALUES:
|
|
<span class="nv">server_version</span><span class="o">=</span>nginx: <span class="m">1</span>.10.0 - lua: <span class="m">10001</span>
|
|
|
|
HEADERS RECEIVED:
|
|
<span class="nv">accept</span><span class="o">=</span>*/*
|
|
<span class="nv">connection</span><span class="o">=</span>close
|
|
content-length<span class="o">=</span><span class="m">4</span>
|
|
content-type<span class="o">=</span>application/x-www-form-urlencoded
|
|
<span class="nv">host</span><span class="o">=</span>example.com
|
|
user-agent<span class="o">=</span>curl/7.54.0
|
|
x-forwarded-for<span class="o">=</span><span class="m">192</span>.168.99.1
|
|
x-forwarded-host<span class="o">=</span>example.com
|
|
x-forwarded-port<span class="o">=</span><span class="m">80</span>
|
|
x-forwarded-proto<span class="o">=</span>http
|
|
x-original-uri<span class="o">=</span>/echo
|
|
x-real-ip<span class="o">=</span><span class="m">192</span>.168.99.1
|
|
x-scheme<span class="o">=</span>http
|
|
BODY:
|
|
meow
|
|
</pre></div></p>
|
|
</li>
|
|
<li>
|
|
<p>View the Jaeger UI:
|
|
<div class="codehilite"><pre><span></span>$ minikube service jaeger-query --url
|
|
|
|
http://192.168.99.100:30183
|
|
</pre></div></p>
|
|
<p>In the Jaeger interface we can see the details:
|
|
<img alt="jaeger screenshot" src="../../../images/jaeger-demo.png" title="jaeger collector screenshot" /></p>
|
|
</li>
|
|
</ol>
|
|
|
|
|
|
|
|
|
|
|
|
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