ingress-nginx-helm/user-guide/multiple-ingress/index.html
2024-09-15 15:04:08 +00:00

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<!doctype html><html lang=en class=no-js> <head><meta charset=utf-8><meta name=viewport content="width=device-width,initial-scale=1"><link href=https://kubernetes.github.io/ingress-nginx/user-guide/multiple-ingress/ rel=canonical><link href=../monitoring/ rel=prev><link href=../tls/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.5.3, mkdocs-material-9.4.5"><title>Multiple Ingress controllers - Ingress-Nginx Controller</title><link rel=stylesheet href=../../assets/stylesheets/main.6a10b989.min.css><link rel=stylesheet href=../../assets/stylesheets/palette.356b1318.min.css><link rel=preconnect href=https://fonts.gstatic.com crossorigin><link rel=stylesheet href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback"><style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style><link rel=stylesheet href=../../extra.css><script>__md_scope=new 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199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg> </div> <div class=md-source__repository> kubernetes/ingress-nginx </div> </a> </div> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_1> <label class=md-nav__link for=__nav_1 id=__nav_1_label tabindex> <span class=md-ellipsis> Welcome </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_1_label aria-expanded=false> <label class=md-nav__title for=__nav_1> <span class="md-nav__icon md-icon"></span> Welcome </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../.. class=md-nav__link> <span 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class=md-nav__item> <a href=../../deploy/ class=md-nav__link> <span class=md-ellipsis> Installation Guide </span> </a> </li> <li class=md-nav__item> <a href=../../deploy/baremetal/ class=md-nav__link> <span class=md-ellipsis> Bare-metal considerations </span> </a> </li> <li class=md-nav__item> <a href=../../deploy/rbac/ class=md-nav__link> <span class=md-ellipsis> Role Based Access Control (RBAC) </span> </a> </li> <li class=md-nav__item> <a href=../../deploy/upgrade/ class=md-nav__link> <span class=md-ellipsis> Upgrade </span> </a> </li> <li class=md-nav__item> <a href=../../deploy/hardening-guide/ class=md-nav__link> <span class=md-ellipsis> Hardening guide </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_3 checked> <label class=md-nav__link for=__nav_3 id=__nav_3_label tabindex> <span class=md-ellipsis> User Guide </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_3_label aria-expanded=true> <label class=md-nav__title for=__nav_3> <span class="md-nav__icon md-icon"></span> User Guide </label> <ul class=md-nav__list data-md-scrollfix> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_3_1> <label class=md-nav__link for=__nav_3_1 id=__nav_3_1_label tabindex> <span class=md-ellipsis> NGINX Configuration </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_3_1_label aria-expanded=false> <label class=md-nav__title for=__nav_3_1> <span class="md-nav__icon md-icon"></span> NGINX Configuration </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../nginx-configuration/ class=md-nav__link> <span class=md-ellipsis> Introduction </span> </a> </li> <li class=md-nav__item> <a href=../basic-usage/ class=md-nav__link> <span class=md-ellipsis> Basic usage </span> </a> </li> <li class=md-nav__item> <a href=../nginx-configuration/annotations/ class=md-nav__link> <span class=md-ellipsis> Annotations </span> </a> </li> <li class=md-nav__item> <a href=../nginx-configuration/annotations-risk/ class=md-nav__link> <span class=md-ellipsis> Annotations Risks </span> </a> </li> <li class=md-nav__item> <a href=../nginx-configuration/configmap/ class=md-nav__link> <span class=md-ellipsis> ConfigMap </span> </a> </li> <li class=md-nav__item> <a href=../nginx-configuration/custom-template/ class=md-nav__link> <span class=md-ellipsis> Custom NGINX template </span> </a> </li> <li class=md-nav__item> <a href=../nginx-configuration/log-format/ class=md-nav__link> <span class=md-ellipsis> Log format </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../cli-arguments/ class=md-nav__link> <span class=md-ellipsis> Command line arguments </span> </a> </li> <li class=md-nav__item> <a href=../custom-errors/ class=md-nav__link> <span class=md-ellipsis> Custom errors </span> </a> </li> <li class=md-nav__item> <a href=../default-backend/ class=md-nav__link> <span class=md-ellipsis> Default backend </span> </a> </li> <li class=md-nav__item> <a href=../exposing-tcp-udp-services/ class=md-nav__link> <span class=md-ellipsis> Exposing TCP and UDP services </span> </a> </li> <li class=md-nav__item> <a href=../fcgi-services/ class=md-nav__link> <span class=md-ellipsis> Exposing FCGI services </span> </a> </li> <li class=md-nav__item> <a href=../ingress-path-matching/ class=md-nav__link> <span class=md-ellipsis> Regular expressions in paths </span> </a> </li> <li class=md-nav__item> <a href=../external-articles/ class=md-nav__link> <span class=md-ellipsis> External Articles </span> </a> </li> <li class=md-nav__item> <a href=../miscellaneous/ class=md-nav__link> <span class=md-ellipsis> Miscellaneous </span> </a> </li> <li class=md-nav__item> <a href=../monitoring/ class=md-nav__link> <span class=md-ellipsis> Prometheus and Grafana installation </span> </a> </li> <li class="md-nav__item md-nav__item--active"> <input class="md-nav__toggle md-toggle" type=checkbox id=__toc> <label class="md-nav__link md-nav__link--active" for=__toc> <span class=md-ellipsis> Multiple Ingress controllers </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> Multiple Ingress controllers </span> </a> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#using-ingressclasses class=md-nav__link> Using IngressClasses </a> </li> <li class=md-nav__item> <a href=#using-the-kubernetesioingressclass-annotation-in-deprecation class=md-nav__link> Using the kubernetes.io/ingress.class annotation (in deprecation) </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../tls/ class=md-nav__link> <span class=md-ellipsis> TLS/HTTPS </span> </a> </li> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_3_13> <label class=md-nav__link for=__nav_3_13 id=__nav_3_13_label tabindex> <span class=md-ellipsis> Third party addons </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_3_13_label aria-expanded=false> <label class=md-nav__title for=__nav_3_13> <span class="md-nav__icon md-icon"></span> Third party addons </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../third-party-addons/modsecurity/ class=md-nav__link> <span class=md-ellipsis> ModSecurity Web Application Firewall </span> </a> </li> <li class=md-nav__item> <a href=../third-party-addons/opentelemetry/ class=md-nav__link> <span class=md-ellipsis> OpenTelemetry </span> </a> </li> </ul> </nav> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4> <label class=md-nav__link for=__nav_4 id=__nav_4_label tabindex> <span class=md-ellipsis> Examples </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_4_label aria-expanded=false> <label class=md-nav__title for=__nav_4> <span class="md-nav__icon md-icon"></span> Examples </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../examples/ class=md-nav__link> <span class=md-ellipsis> Introduction </span> </a> </li> <li class=md-nav__item> <a href=../../examples/PREREQUISITES/ class=md-nav__link> <span class=md-ellipsis> Prerequisites </span> </a> </li> <li class=md-nav__item> <a href=../../examples/affinity/cookie/ class=md-nav__link> <span class=md-ellipsis> Sticky Sessions </span> </a> </li> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_4> <label class=md-nav__link for=__nav_4_4 id=__nav_4_4_label tabindex> <span class=md-ellipsis> Auth </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_4_label aria-expanded=false> <label class=md-nav__title for=__nav_4_4> <span class="md-nav__icon md-icon"></span> Auth </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../examples/auth/basic/ class=md-nav__link> <span class=md-ellipsis> Basic Authentication </span> </a> </li> <li class=md-nav__item> <a href=../../examples/auth/client-certs/ class=md-nav__link> <span class=md-ellipsis> Client Certificate Authentication </span> </a> </li> <li class=md-nav__item> <a href=../../examples/auth/external-auth/ class=md-nav__link> <span class=md-ellipsis> External Basic Authentication </span> </a> </li> <li class=md-nav__item> <a href=../../examples/auth/oauth-external-auth/ class=md-nav__link> <span class=md-ellipsis> External OAUTH Authentication </span> </a> </li> </ul> </nav> </li> <li class="md-nav__item md-nav__item--section md-nav__item--nested"> <input class="md-nav__toggle md-toggle " type=checkbox id=__nav_4_5> <label class=md-nav__link for=__nav_4_5 id=__nav_4_5_label tabindex> <span class=md-ellipsis> Customization </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=2 aria-labelledby=__nav_4_5_label aria-expanded=false> <label class=md-nav__title for=__nav_4_5> <span class="md-nav__icon md-icon"></span> Customization </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../examples/customization/configuration-snippets/ class=md-nav__link> <span class=md-ellipsis> Configuration Snippets </span> </a> </li> <li class=md-nav__item> <a 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class=md-nav__item> <a href=../../faq/ class=md-nav__link> <span class=md-ellipsis> FAQ </span> </a> </li> </ul> </nav> </div> </div> </div> <div class="md-sidebar md-sidebar--secondary" data-md-component=sidebar data-md-type=toc> <div class=md-sidebar__scrollwrap> <div class=md-sidebar__inner> <nav class="md-nav md-nav--secondary" aria-label="Table of contents"> <label class=md-nav__title for=__toc> <span class="md-nav__icon md-icon"></span> Table of contents </label> <ul class=md-nav__list data-md-component=toc data-md-scrollfix> <li class=md-nav__item> <a href=#using-ingressclasses class=md-nav__link> Using IngressClasses </a> </li> <li class=md-nav__item> <a href=#using-the-kubernetesioingressclass-annotation-in-deprecation class=md-nav__link> Using the kubernetes.io/ingress.class annotation (in deprecation) </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <h1 id=multiple-ingress-controllers>Multiple Ingress controllers<a class=headerlink href=#multiple-ingress-controllers title="Permanent link"></a></h1> <p>By default, deploying multiple Ingress controllers (e.g., <code>ingress-nginx</code> &amp; <code>gce</code>) will result in all controllers simultaneously racing to update Ingress status fields in confusing ways.</p> <p>To fix this problem, use <a href=https://kubernetes.io/docs/concepts/services-networking/ingress/#ingress-class>IngressClasses</a>. The <code>kubernetes.io/ingress.class</code> annotation is not being preferred or suggested to use as it can be deprecated in the future. Better to use the field <code>ingress.spec.ingressClassName</code>. But, when user has deployed with <code>scope.enabled</code>, then the ingress class resource field is not used.</p> <h2 id=using-ingressclasses>Using IngressClasses<a class=headerlink href=#using-ingressclasses title="Permanent link"></a></h2> <p>If all ingress controllers respect IngressClasses (e.g. multiple instances of ingress-nginx v1.0), you can deploy two Ingress controllers by granting them control over two different IngressClasses, then selecting one of the two IngressClasses with <code>ingressClassName</code>.</p> <p>First, ensure the <code>--controller-class=</code> and <code>--ingress-class</code> are set to something different on each ingress controller, If your additional ingress controller is to be installed in a namespace, where there is/are one/more-than-one ingress-nginx-controller(s) already installed, then you need to specify a different unique <code>--election-id</code> for the new instance of the controller.</p> <div class=highlight><pre><span></span><code><span class=c1># ingress-nginx Deployment/Statefulset</span>
<span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>template</span><span class=p>:</span>
<span class=w> </span><span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>containers</span><span class=p>:</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">ingress-nginx-internal-controller</span>
<span class=w> </span><span class=nt>args</span><span class=p>:</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">/nginx-ingress-controller</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class=s>&#39;--election-id=ingress-controller-leader&#39;</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class=s>&#39;--controller-class=k8s.io/internal-ingress-nginx&#39;</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class=s>&#39;--ingress-class=k8s.io/internal-nginx&#39;</span>
<span class=w> </span><span class="w w-Error"> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
</code></pre></div> <p>Then use the same value in the IngressClass:</p> <div class=highlight><pre><span></span><code><span class=c1># ingress-nginx IngressClass</span>
<span class=nt>apiVersion</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">networking.k8s.io/v1</span>
<span class=nt>kind</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">IngressClass</span>
<span class=nt>metadata</span><span class=p>:</span>
<span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">internal-nginx</span>
<span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>controller</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">k8s.io/internal-ingress-nginx</span>
<span class=w> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
</code></pre></div> <p>And refer to that IngressClass in your Ingress:</p> <div class=highlight><pre><span></span><code><span class=nt>apiVersion</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">networking.k8s.io/v1</span>
<span class=nt>kind</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">Ingress</span>
<span class=nt>metadata</span><span class=p>:</span>
<span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">my-ingress</span>
<span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>ingressClassName</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">internal-nginx</span>
<span class=w> </span><span class="l l-Scalar l-Scalar-Plain">...</span>
</code></pre></div> <p>or if installing with Helm:</p> <div class=highlight><pre><span></span><code><span class=nt>controller</span><span class=p>:</span>
<span class=w> </span><span class=nt>electionID</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">ingress-controller-leader</span>
<span class=w> </span><span class=nt>ingressClass</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">internal-nginx</span><span class=w> </span><span class=c1># default: nginx</span>
<span class=w> </span><span class=nt>ingressClassResource</span><span class=p>:</span>
<span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">internal-nginx</span><span class=w> </span><span class=c1># default: nginx</span>
<span class=w> </span><span class=nt>enabled</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">true</span>
<span class=w> </span><span class=nt>default</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">false</span>
<span class=w> </span><span class=nt>controllerValue</span><span class=p>:</span><span class=w> </span><span class=s>&quot;k8s.io/internal-ingress-nginx&quot;</span><span class=w> </span><span class=c1># default: k8s.io/ingress-nginx</span>
</code></pre></div> <div class="admonition important"> <p class=admonition-title>Important</p> <p>When running multiple ingress-nginx controllers, it will only process an unset class annotation if one of the controllers uses the default <code>--controller-class</code> value (see <code>IsValid</code> method in <code>internal/ingress/annotations/class/main.go</code>), otherwise the class annotation becomes required.</p> <p>If <code>--controller-class</code> is set to the default value of <code>k8s.io/ingress-nginx</code>, the controller will monitor Ingresses with no class annotation <em>and</em> Ingresses with annotation class set to <code>nginx</code>. Use a non-default value for <code>--controller-class</code>, to ensure that the controller only satisfied the specific class of Ingresses.</p> </div> <h2 id=using-the-kubernetesioingressclass-annotation-in-deprecation>Using the kubernetes.io/ingress.class annotation (in deprecation)<a class=headerlink href=#using-the-kubernetesioingressclass-annotation-in-deprecation title="Permanent link"></a></h2> <p>If you're running multiple ingress controllers where one or more do not support IngressClasses, you must specify the annotation <code>kubernetes.io/ingress.class: "nginx"</code> in all ingresses that you would like ingress-nginx to claim.</p> <p>For instance,</p> <div class=highlight><pre><span></span><code><span class=nt>metadata</span><span class=p>:</span>
<span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">foo</span>
<span class=w> </span><span class=nt>annotations</span><span class=p>:</span>
<span class=w> </span><span class=nt>kubernetes.io/ingress.class</span><span class=p>:</span><span class=w> </span><span class=s>&quot;gce&quot;</span>
</code></pre></div> <p>will target the GCE controller, forcing the Ingress-NGINX controller to ignore it, while an annotation like:</p> <div class=highlight><pre><span></span><code><span class=nt>metadata</span><span class=p>:</span>
<span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">foo</span>
<span class=w> </span><span class=nt>annotations</span><span class=p>:</span>
<span class=w> </span><span class=nt>kubernetes.io/ingress.class</span><span class=p>:</span><span class=w> </span><span class=s>&quot;nginx&quot;</span>
</code></pre></div> <p>will target the Ingress-NGINX controller, forcing the GCE controller to ignore it.</p> <p>You can change the value "nginx" to something else by setting the <code>--ingress-class</code> flag:</p> <div class=highlight><pre><span></span><code><span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>template</span><span class=p>:</span>
<span class=w> </span><span class=nt>spec</span><span class=p>:</span>
<span class=w> </span><span class=nt>containers</span><span class=p>:</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class=nt>name</span><span class=p>:</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">ingress-nginx-internal-controller</span>
<span class=w> </span><span class=nt>args</span><span class=p>:</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">/nginx-ingress-controller</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">--ingress-class=internal-nginx</span>
</code></pre></div> <p>then setting the corresponding <code>kubernetes.io/ingress.class: "internal-nginx"</code> annotation on your Ingresses.</p> <p>To reiterate, setting the annotation to any value which does not match a valid ingress class will force the Ingress-Nginx Controller to ignore your Ingress. If you are only running a single Ingress-Nginx Controller, this can be achieved by setting the annotation to any value except "nginx" or an empty string.</p> <p>Do this if you wish to use one of the other Ingress controllers at the same time as the NGINX controller.</p> </article> </div> </div> </main> <footer class=md-footer> <div class="md-footer-meta md-typeset"> <div class="md-footer-meta__inner md-grid"> <div class=md-copyright> Made with <a href=https://squidfunk.github.io/mkdocs-material/ target=_blank rel=noopener> Material for MkDocs </a> </div> </div> </div> </footer> </div> <div class=md-dialog data-md-component=dialog> <div class="md-dialog__inner md-typeset"></div> </div> <script id=__config type=application/json>{"base": "../..", "features": ["navigation.tabs", "navigation.tabs.sticky", "navigation.instant", "navigation.sections"], "search": "../../assets/javascripts/workers/search.f886a092.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script> <script src=../../assets/javascripts/bundle.aecac24b.min.js></script> </body> </html>