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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/examples/static-ip/ rel=canonical><link href=../rewrite/ rel=prev><link href=../tls-termination/ rel=next><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.5.3, mkdocs-material-9.4.5"><title>Static IPs - 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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Examples </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../ class=md-nav__link> <span class=md-ellipsis> Introduction </span> </a> </li> <li class=md-nav__item> <a href=../PREREQUISITES/ class=md-nav__link> <span class=md-ellipsis> Prerequisites </span> </a> </li> <li class=md-nav__item> <a href=../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 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DH parameters for perfect forward secrecy </span> </a> </li> <li class=md-nav__item> <a href=../customization/sysctl/ class=md-nav__link> <span class=md-ellipsis> Sysctl tuning </span> </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../docker-registry/ class=md-nav__link> <span class=md-ellipsis> Docker registry </span> </a> </li> <li class=md-nav__item> <a href=../grpc/ class=md-nav__link> <span class=md-ellipsis> gRPC </span> </a> </li> <li class=md-nav__item> <a href=../multi-tls/ class=md-nav__link> <span class=md-ellipsis> Multi TLS certificate termination </span> </a> </li> <li class=md-nav__item> <a href=../rewrite/ class=md-nav__link> <span class=md-ellipsis> Rewrite </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> Static IPs </span> <span class="md-nav__icon md-icon"></span> </label> <a href=./ class="md-nav__link md-nav__link--active"> <span class=md-ellipsis> Static IPs </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=#prerequisites class=md-nav__link> Prerequisites </a> </li> <li class=md-nav__item> <a href=#acquiring-an-ip class=md-nav__link> Acquiring an IP </a> </li> <li class=md-nav__item> <a href=#assigning-the-ip-to-an-ingress class=md-nav__link> Assigning the IP to an Ingress </a> </li> <li class=md-nav__item> <a href=#retaining-the-ip class=md-nav__link> Retaining the IP </a> </li> <li class=md-nav__item> <a href=#promote-ephemeral-to-static-ip class=md-nav__link> Promote ephemeral to static IP </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=../tls-termination/ class=md-nav__link> <span class=md-ellipsis> TLS termination </span> </a> </li> <li class=md-nav__item> <a href=../openpolicyagent/ class=md-nav__link> <span class=md-ellipsis> Open Policy Agent rules </span> </a> </li> <li class=md-nav__item> <a href=../canary/ class=md-nav__link> <span class=md-ellipsis> Canary Deployments </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_5> <label class=md-nav__link for=__nav_5 id=__nav_5_label tabindex> <span class=md-ellipsis> Developer Guide </span> <span class="md-nav__icon md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_5_label aria-expanded=false> <label class=md-nav__title for=__nav_5> <span class="md-nav__icon md-icon"></span> Developer Guide </label> <ul class=md-nav__list data-md-scrollfix> <li class=md-nav__item> <a href=../../developer-guide/getting-started/ class=md-nav__link> <span class=md-ellipsis> Getting Started </span> </a> </li> <li class=md-nav__item> <a href=../../developer-guide/code-overview/ class=md-nav__link> <span class=md-ellipsis> Code Overview </span> </a> </li> </ul> </nav> </li> <li 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=#prerequisites class=md-nav__link> Prerequisites </a> </li> <li class=md-nav__item> <a href=#acquiring-an-ip class=md-nav__link> Acquiring an IP </a> </li> <li class=md-nav__item> <a href=#assigning-the-ip-to-an-ingress class=md-nav__link> Assigning the IP to an Ingress </a> </li> <li class=md-nav__item> <a href=#retaining-the-ip class=md-nav__link> Retaining the IP </a> </li> <li class=md-nav__item> <a href=#promote-ephemeral-to-static-ip class=md-nav__link> Promote ephemeral to static IP </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <h1 id=static-ips>Static IPs<a class=headerlink href=#static-ips title="Permanent link"> ¶</a></h1> <p>This example demonstrates how to assign a static-ip to an Ingress on through the Ingress-NGINX controller.</p> <h2 id=prerequisites>Prerequisites<a class=headerlink href=#prerequisites title="Permanent link"> ¶</a></h2> <p>You need a <a href=../PREREQUISITES/#tls-certificates>TLS cert</a> and a <a href=../PREREQUISITES/#test-http-service>test HTTP service</a> for this example. You will also 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=acquiring-an-ip>Acquiring an IP<a class=headerlink href=#acquiring-an-ip title="Permanent link"> ¶</a></h2> <p>Since instances of the ingress nginx controller actually run on nodes in your cluster, by default nginx Ingresses will only get static IPs if your cloudprovider supports static IP assignments to nodes. On GKE/GCE for example, even though nodes get static IPs, the IPs are not retained across upgrades.</p> <p>To acquire a static IP for the ingress-nginx-controller, simply put it behind a Service of <code>Type=LoadBalancer</code>.</p> <p>First, create a loadbalancer Service and wait for it to acquire an IP:</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>kubectl<span class=w> </span>create<span class=w> </span>-f<span class=w> </span>static-ip-svc.yaml
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<span class=go>service "ingress-nginx-lb" created</span>
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<span class=gp>$ </span>kubectl<span class=w> </span>get<span class=w> </span>svc<span class=w> </span>ingress-nginx-lb
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<span class=go>NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE</span>
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<span class=go>ingress-nginx-lb 10.0.138.113 104.154.109.191 80:31457/TCP,443:32240/TCP 15m</span>
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</code></pre></div> <p>Then, update the ingress controller so it adopts the static IP of the Service by passing the <code>--publish-service</code> flag (the example yaml used in the next step already has it set to "ingress-nginx-lb").</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>kubectl<span class=w> </span>create<span class=w> </span>-f<span class=w> </span>ingress-nginx-controller.yaml
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<span class=go>deployment "ingress-nginx-controller" created</span>
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</code></pre></div> <h2 id=assigning-the-ip-to-an-ingress>Assigning the IP to an Ingress<a class=headerlink href=#assigning-the-ip-to-an-ingress title="Permanent link"> ¶</a></h2> <p>From here on every Ingress created with the <code>ingress.class</code> annotation set to <code>nginx</code> will get the IP allocated in the previous step.</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>kubectl<span class=w> </span>create<span class=w> </span>-f<span class=w> </span>ingress-nginx.yaml
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<span class=go>ingress "ingress-nginx" created</span>
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<span class=gp>$ </span>kubectl<span class=w> </span>get<span class=w> </span>ing<span class=w> </span>ingress-nginx
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<span class=go>NAME HOSTS ADDRESS PORTS AGE</span>
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<span class=go>ingress-nginx * 104.154.109.191 80, 443 13m</span>
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<span class=gp>$ </span>curl<span class=w> </span><span class=m>104</span>.154.109.191<span class=w> </span>-kL
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<span class=go>CLIENT VALUES:</span>
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<span class=go>client_address=10.180.1.25</span>
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<span class=go>command=GET</span>
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<span class=go>real path=/</span>
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<span class=go>query=nil</span>
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<span class=go>request_version=1.1</span>
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<span class=go>request_uri=http://104.154.109.191:8080/</span>
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<span class=go>...</span>
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</code></pre></div> <h2 id=retaining-the-ip>Retaining the IP<a class=headerlink href=#retaining-the-ip title="Permanent link"> ¶</a></h2> <p>You can test retention by deleting the Ingress:</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>kubectl<span class=w> </span>delete<span class=w> </span>ing<span class=w> </span>ingress-nginx
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<span class=go>ingress "ingress-nginx" deleted</span>
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<span class=gp>$ </span>kubectl<span class=w> </span>create<span class=w> </span>-f<span class=w> </span>ingress-nginx.yaml
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<span class=go>ingress "ingress-nginx" created</span>
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<span class=gp>$ </span>kubectl<span class=w> </span>get<span class=w> </span>ing<span class=w> </span>ingress-nginx
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<span class=go>NAME HOSTS ADDRESS PORTS AGE</span>
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<span class=go>ingress-nginx * 104.154.109.191 80, 443 13m</span>
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</code></pre></div> <blockquote> <p>Note that unlike the GCE Ingress, the same loadbalancer IP is shared amongst all Ingresses, because all requests are proxied through the same set of nginx controllers.</p> </blockquote> <h2 id=promote-ephemeral-to-static-ip>Promote ephemeral to static IP<a class=headerlink href=#promote-ephemeral-to-static-ip title="Permanent link"> ¶</a></h2> <p>To promote the allocated IP to static, you can update the Service manifest:</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>kubectl<span class=w> </span>patch<span class=w> </span>svc<span class=w> </span>ingress-nginx-lb<span class=w> </span>-p<span class=w> </span><span class=s1>'{"spec": {"loadBalancerIP": "104.154.109.191"}}'</span>
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<span class=go>"ingress-nginx-lb" patched</span>
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</code></pre></div> <p>... and promote the IP to static (promotion works differently for cloudproviders, provided example is for GKE/GCE):</p> <div class=highlight><pre><span></span><code><span class=gp>$ </span>gcloud<span class=w> </span>compute<span class=w> </span>addresses<span class=w> </span>create<span class=w> </span>ingress-nginx-lb<span class=w> </span>--addresses<span class=w> </span><span class=m>104</span>.154.109.191<span class=w> </span>--region<span class=w> </span>us-central1
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<span class=go>Created [https://www.googleapis.com/compute/v1/projects/kubernetesdev/regions/us-central1/addresses/ingress-nginx-lb].</span>
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<span class=go>---</span>
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<span class=go>address: 104.154.109.191</span>
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<span class=go>creationTimestamp: '2017-01-31T16:34:50.089-08:00'</span>
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<span class=go>description: ''</span>
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<span class=go>id: '5208037144487826373'</span>
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<span class=go>kind: compute#address</span>
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<span class=go>name: ingress-nginx-lb</span>
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<span class=go>region: us-central1</span>
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<span class=go>selfLink: https://www.googleapis.com/compute/v1/projects/kubernetesdev/regions/us-central1/addresses/ingress-nginx-lb</span>
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<span class=go>status: IN_USE</span>
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<span class=go>users:</span>
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<span class=go>- us-central1/forwardingRules/a09f6913ae80e11e6a8c542010af0000</span>
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</code></pre></div> <p>Now even if the Service is deleted, the IP will persist, so you can recreate the Service with <code>spec.loadBalancerIP</code> set to <code>104.154.109.191</code>.</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> |