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<h1 id="rewrite">Rewrite<a class="headerlink" href="#rewrite" title="Permanent link">&para;</a></h1>
<p>This example demonstrates how to use the Rewrite annotations</p>
<h2 id="prerequisites">Prerequisites<a class="headerlink" href="#prerequisites" title="Permanent link">&para;</a></h2>
<p>You will need to make sure your Ingress targets exactly one Ingress
controller by specifying the <a href="../../user-guide/multiple-ingress/">ingress.class annotation</a>,
and that you have an ingress controller <a href="../../deploy">running</a> in your cluster.</p>
<h2 id="deployment">Deployment<a class="headerlink" href="#deployment" title="Permanent link">&para;</a></h2>
<p>Rewriting can be controlled using the following annotations:</p>
<table>
<thead>
<tr>
<th>Name</th>
<th>Description</th>
<th>Values</th>
</tr>
</thead>
<tbody>
<tr>
<td>nginx.ingress.kubernetes.io/rewrite-target</td>
<td>Target URI where the traffic must be redirected</td>
<td>string</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/add-base-url</td>
<td>indicates if is required to add a base tag in the head of the responses from the upstream servers</td>
<td>bool</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/base-url-scheme</td>
<td>Override for the scheme passed to the base tag</td>
<td>string</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/ssl-redirect</td>
<td>Indicates if the location section is accessible SSL only (defaults to True when Ingress contains a Certificate)</td>
<td>bool</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/force-ssl-redirect</td>
<td>Forces the redirection to HTTPS even if the Ingress is not TLS Enabled</td>
<td>bool</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/app-root</td>
<td>Defines the Application Root that the Controller must redirect if it's in '/' context</td>
<td>string</td>
</tr>
<tr>
<td>nginx.ingress.kubernetes.io/use-regex</td>
<td>Indicates if the paths defined on an Ingress use regular expressions</td>
<td>bool</td>
</tr>
</tbody>
</table>
<h2 id="validation">Validation<a class="headerlink" href="#validation" title="Permanent link">&para;</a></h2>
<h3 id="rewrite-target">Rewrite Target<a class="headerlink" href="#rewrite-target" title="Permanent link">&para;</a></h3>
<p>Create an Ingress rule with a rewrite annotation:</p>
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> <span class="nb">echo</span> <span class="s2">&quot;</span>
<span class="go">apiVersion: extensions/v1beta1</span>
<span class="go">kind: Ingress</span>
<span class="go">metadata:</span>
<span class="go"> annotations:</span>
<span class="go"> nginx.ingress.kubernetes.io/rewrite-target: /</span>
<span class="go"> name: rewrite</span>
<span class="go"> namespace: default</span>
<span class="go">spec:</span>
<span class="go"> rules:</span>
<span class="go"> - host: rewrite.bar.com</span>
<span class="go"> http:</span>
<span class="go"> paths:</span>
<span class="go"> - backend:</span>
<span class="go"> serviceName: http-svc</span>
<span class="go"> servicePort: 80</span>
<span class="go"> path: /something</span>
<span class="go">&quot; | kubectl create -f -</span>
</pre></div>
</td></tr></table>
<p>Check the rewrite is working</p>
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
2
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7
8
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19
20
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22
23
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25
26
27
28
29
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31
32
33
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35
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38
39</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ curl -v http://172.17.4.99/something -H <span class="s1">&#39;Host: rewrite.bar.com&#39;</span>
* Trying <span class="m">172</span>.17.4.99...
* Connected to <span class="m">172</span>.17.4.99 <span class="o">(</span><span class="m">172</span>.17.4.99<span class="o">)</span> port <span class="m">80</span> <span class="o">(</span><span class="c1">#0)</span>
&gt; GET /something HTTP/1.1
&gt; Host: rewrite.bar.com
&gt; User-Agent: curl/7.43.0
&gt; Accept: */*
&gt;
&lt; HTTP/1.1 <span class="m">200</span> OK
&lt; Server: nginx/1.11.0
&lt; Date: Tue, <span class="m">31</span> May <span class="m">2016</span> <span class="m">16</span>:07:31 GMT
&lt; Content-Type: text/plain
&lt; Transfer-Encoding: chunked
&lt; Connection: keep-alive
&lt;
CLIENT VALUES:
<span class="nv">client_address</span><span class="o">=</span><span class="m">10</span>.2.56.9
<span class="nv">command</span><span class="o">=</span>GET
real <span class="nv">path</span><span class="o">=</span>/
<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://rewrite.bar.com:8080/
SERVER VALUES:
<span class="nv">server_version</span><span class="o">=</span>nginx: <span class="m">1</span>.9.11 - 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
<span class="nv">host</span><span class="o">=</span>rewrite.bar.com
user-agent<span class="o">=</span>curl/7.43.0
x-forwarded-for<span class="o">=</span><span class="m">10</span>.2.56.1
x-forwarded-host<span class="o">=</span>rewrite.bar.com
x-forwarded-port<span class="o">=</span><span class="m">80</span>
x-forwarded-proto<span class="o">=</span>http
x-real-ip<span class="o">=</span><span class="m">10</span>.2.56.1
BODY:
* Connection <span class="c1">#0 to host 172.17.4.99 left intact</span>
-no body in request-
</pre></div>
</td></tr></table>
<h3 id="app-root">App Root<a class="headerlink" href="#app-root" title="Permanent link">&para;</a></h3>
<p>Create an Ingress rule with a app-root annotation:
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ <span class="nb">echo</span> <span class="s2">&quot;</span>
<span class="s2">apiVersion: extensions/v1beta1</span>
<span class="s2">kind: Ingress</span>
<span class="s2">metadata:</span>
<span class="s2"> annotations:</span>
<span class="s2"> nginx.ingress.kubernetes.io/app-root: /app1</span>
<span class="s2"> name: approot</span>
<span class="s2"> namespace: default</span>
<span class="s2">spec:</span>
<span class="s2"> rules:</span>
<span class="s2"> - host: approot.bar.com</span>
<span class="s2"> http:</span>
<span class="s2"> paths:</span>
<span class="s2"> - backend:</span>
<span class="s2"> serviceName: http-svc</span>
<span class="s2"> servicePort: 80</span>
<span class="s2"> path: /</span>
<span class="s2">&quot;</span> <span class="p">|</span> kubectl create -f -
</pre></div>
</td></tr></table></p>
<p>Check the rewrite is working</p>
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
2
3
4
5
6
7
8</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ curl -I -k http://approot.bar.com/
HTTP/1.1 <span class="m">302</span> Moved Temporarily
Server: nginx/1.11.10
Date: Mon, <span class="m">13</span> Mar <span class="m">2017</span> <span class="m">14</span>:57:15 GMT
Content-Type: text/html
Content-Length: <span class="m">162</span>
Location: http://stickyingress.example.com/app1
Connection: keep-alive
</pre></div>
</td></tr></table>
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