1453 lines
35 KiB
HTML
1453 lines
35 KiB
HTML
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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="#rewrite" tabindex="0" class="md-skip">
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<i class="md-icon">public</i>
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<span class="md-header-nav__topic">
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NGINX Ingress Controller
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Rewrite
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<div class="md-source__repository">
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kubernetes/ingress-nginx
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How it works
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kubectl plugin
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Installation Guide
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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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<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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<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 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--nested">
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<input class="md-toggle md-nav__toggle" data-md-toggle="nav-3" type="checkbox" id="nav-3">
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User guide
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<nav class="md-nav" data-md-component="collapsible" data-md-level="1">
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User guide
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<ul class="md-nav__list" data-md-scrollfix>
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NGINX Configuration
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NGINX Configuration
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<li class="md-nav__item">
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<a href="../../user-guide/nginx-configuration/" title="Introduction" class="md-nav__link">
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Introduction
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</a>
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<li class="md-nav__item">
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<a href="../../user-guide/basic-usage/" title="Basic usage" class="md-nav__link">
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Basic usage
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<a href="../../user-guide/nginx-configuration/annotations/" title="Annotations" class="md-nav__link">
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Annotations
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<li class="md-nav__item">
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<a href="../../user-guide/nginx-configuration/configmap/" title="ConfigMap" class="md-nav__link">
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ConfigMap
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<li class="md-nav__item">
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<a href="../../user-guide/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 class="md-nav__item">
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<a href="../../user-guide/nginx-configuration/log-format/" title="Log format" class="md-nav__link">
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<a href="https://github.com/kubernetes/ingress-nginx/edit/master/docs/examples/rewrite/README.md" title="Edit this page" class="md-icon md-content__icon"></a>
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<h1 id="rewrite">Rewrite<a class="headerlink" href="#rewrite" title="Permanent link"> ¶</a></h1>
|
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<p>This example demonstrates how to use the Rewrite annotations</p>
|
|
<h2 id="prerequisites">Prerequisites<a class="headerlink" href="#prerequisites" title="Permanent link"> ¶</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>
|
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<h2 id="deployment">Deployment<a class="headerlink" href="#deployment" title="Permanent link"> ¶</a></h2>
|
|
<p>Rewriting can be controlled using the following annotations:</p>
|
|
<table>
|
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<thead>
|
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<tr>
|
|
<th>Name</th>
|
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<th>Description</th>
|
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<th>Values</th>
|
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</tr>
|
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</thead>
|
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<tbody>
|
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<tr>
|
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<td>nginx.ingress.kubernetes.io/rewrite-target</td>
|
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<td>Target URI where the traffic must be redirected</td>
|
|
<td>string</td>
|
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</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>
|
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</tr>
|
|
<tr>
|
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<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="examples">Examples<a class="headerlink" href="#examples" title="Permanent link"> ¶</a></h2>
|
|
<h3 id="rewrite-target">Rewrite Target<a class="headerlink" href="#rewrite-target" title="Permanent link"> ¶</a></h3>
|
|
<div class="admonition attention">
|
|
<p class="admonition-title">Attention</p>
|
|
<p>Starting in Version 0.22.0, ingress definitions using the annotation <code class="codehilite"><span class="err">nginx.ingress.kubernetes.io/rewrite-target</span></code> are not backwards compatible with previous versions. In Version 0.22.0 and beyond, any substrings within the request URI that need to be passed to the rewritten path must explicitly be defined in a <a href="https://www.regular-expressions.info/refcapture.html">capture group</a>.</p>
|
|
</div>
|
|
<div class="admonition note">
|
|
<p class="admonition-title">Note</p>
|
|
<p><a href="https://www.regular-expressions.info/refcapture.html">Captured groups</a> are saved in numbered placeholders, chronologically, in the form <code class="codehilite"><span class="err">$1</span></code>, <code class="codehilite"><span class="err">$2</span></code> ... <code class="codehilite"><span class="err">$n</span></code>. These placeholders can be used as parameters in the <code class="codehilite"><span class="err">rewrite-target</span></code> annotation.</p>
|
|
</div>
|
|
<p>Create an Ingress rule with a rewrite annotation:</p>
|
|
<div class="codehilite"><pre><span></span><code><span class="gp">$</span> <span class="nb">echo</span> <span class="err">'</span>
|
|
<span class="go">apiVersion: networking.k8s.io/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: /$2</span>
|
|
<span class="go"> name: rewrite</span>
|
|
<span class="go"> namespace: default</span>
|
|
<span class="go">spec:</span>
|
|
<span class="go"> rules:</span>
|
|
<span class="go"> - host: rewrite.bar.com</span>
|
|
<span class="go"> http:</span>
|
|
<span class="go"> paths:</span>
|
|
<span class="go"> - backend:</span>
|
|
<span class="go"> serviceName: http-svc</span>
|
|
<span class="go"> servicePort: 80</span>
|
|
<span class="go"> path: /something(/|$)(.*)</span>
|
|
<span class="go">' | kubectl create -f -</span>
|
|
</code></pre></div>
|
|
|
|
<p>In this ingress definition, any characters captured by <code class="codehilite"><span class="err">(.*)</span></code> will be assigned to the placeholder <code class="codehilite"><span class="err">$2</span></code>, which is then used as a parameter in the <code class="codehilite"><span class="err">rewrite-target</span></code> annotation.</p>
|
|
<p>For example, the ingress definition above will result in the following rewrites:</p>
|
|
<ul>
|
|
<li><code class="codehilite"><span class="err">rewrite.bar.com/something</span></code> rewrites to <code class="codehilite"><span class="err">rewrite.bar.com/</span></code></li>
|
|
<li><code class="codehilite"><span class="err">rewrite.bar.com/something/</span></code> rewrites to <code class="codehilite"><span class="err">rewrite.bar.com/</span></code></li>
|
|
<li><code class="codehilite"><span class="err">rewrite.bar.com/something/new</span></code> rewrites to <code class="codehilite"><span class="err">rewrite.bar.com/new</span></code></li>
|
|
</ul>
|
|
<h3 id="app-root">App Root<a class="headerlink" href="#app-root" title="Permanent link"> ¶</a></h3>
|
|
<p>Create an Ingress rule with a app-root annotation:
|
|
<div class="codehilite"><pre><span></span><code>$ <span class="nb">echo</span> <span class="s2">"</span>
|
|
<span class="s2">apiVersion: networking.k8s.io/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">"</span> <span class="p">|</span> kubectl create -f -
|
|
</code></pre></div></p>
|
|
<p>Check the rewrite is working</p>
|
|
<div class="codehilite"><pre><span></span><code>$ 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
|
|
</code></pre></div>
|
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