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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/k8s-122-migration/ rel=canonical><link rel=icon href=../../assets/images/favicon.png><meta name=generator content="mkdocs-1.5.3, mkdocs-material-9.4.5"><title>FAQ - Migration to Kubernetes 1.22 and apiVersion networking.k8s.io/v1 - 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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md-icon"></span> </label> <nav class=md-nav data-md-level=1 aria-labelledby=__nav_3_label aria-expanded=false> <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/ 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class=md-nav__link> <span class=md-ellipsis> Prometheus and Grafana installation </span> </a> </li> <li class=md-nav__item> <a href=../multiple-ingress/ class=md-nav__link> <span class=md-ellipsis> Multiple Ingress controllers </span> </a> </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/ 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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 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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=#what-is-an-ingressclass-and-why-is-it-important-for-users-of-ingress-nginx-controller-now class=md-nav__link> What is an IngressClass and why is it important for users of ingress-nginx controller now? </a> </li> <li class=md-nav__item> <a href=#what-has-caused-this-change-in-behavior class=md-nav__link> What has caused this change in behavior? </a> <nav class=md-nav aria-label="What has caused this change in behavior?"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#reason-1 class=md-nav__link> Reason 1 </a> </li> <li class=md-nav__item> <a href=#reason-2 class=md-nav__link> Reason #2 </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=#what-is-the-ingressclassname-field class=md-nav__link> What is the ingressClassName field? </a> </li> <li class=md-nav__item> <a href=#i-have-only-one-ingress-controller-in-my-cluster-what-should-i-do class=md-nav__link> I have only one ingress controller in my cluster. What should I do? </a> </li> <li class=md-nav__item> <a href=#i-have-many-ingress-objects-in-my-cluster-what-should-i-do class=md-nav__link> I have many ingress objects in my cluster. What should I do? </a> <nav class=md-nav aria-label="I have many ingress objects in my cluster. What should I do?"> <ul class=md-nav__list> <li class=md-nav__item> <a href=#what-is-the-flag-watch-ingress-without-class class=md-nav__link> What is the flag --watch-ingress-without-class? </a> </li> </ul> </nav> </li> <li class=md-nav__item> <a href=#i-have-more-than-one-controller-in-my-cluster-and-im-already-using-the-annotation class=md-nav__link> I have more than one controller in my cluster, and I'm already using the annotation </a> </li> <li class=md-nav__item> <a href=#i-have-more-than-one-controller-running-in-my-cluster-and-i-want-to-use-the-new-api class=md-nav__link> I have more than one controller running in my cluster, and I want to use the new API </a> </li> <li class=md-nav__item> <a href=#why-am-i-seeing-ingress-class-annotation-is-not-equal-to-the-expected-by-ingress-controller-in-my-controller-logs class=md-nav__link> Why am I seeing "ingress class annotation is not equal to the expected by Ingress Controller" in my controller logs? </a> </li> </ul> </nav> </div> </div> </div> <div class=md-content data-md-component=content> <article class="md-content__inner md-typeset"> <h1 id=faq-migration-to-kubernetes-122-and-apiversion-networkingk8siov1>FAQ - Migration to Kubernetes 1.22 and apiVersion <code>networking.k8s.io/v1</code><a class=headerlink href=#faq-migration-to-kubernetes-122-and-apiversion-networkingk8siov1 title="Permanent link"></a></h1> <p>If you are using Ingress objects in your cluster (running Kubernetes older than v1.22), and you plan to upgrade to Kubernetes v1.22, this page is relevant to you.</p> <ul> <li>Please read this <a href=https://kubernetes.io/blog/2021/07/26/update-with-ingress-nginx/ >official blog on deprecated Ingress API versions</a></li> <li>Please read this <a href=https://kubernetes.io/docs/concepts/services-networking/ingress/#ingress-class>official documentation on the IngressClass object</a></li> </ul> <h2 id=what-is-an-ingressclass-and-why-is-it-important-for-users-of-ingress-nginx-controller-now>What is an IngressClass and why is it important for users of ingress-nginx controller now?<a class=headerlink href=#what-is-an-ingressclass-and-why-is-it-important-for-users-of-ingress-nginx-controller-now title="Permanent link"></a></h2> <p>IngressClass is a Kubernetes resource. See the description below. It's important because until now, a default install of the ingress-nginx controller did not require a IngressClass object. From version 1.0.0 of the ingress-nginx controller, an IngressClass object is required.</p> <p>On clusters with more than one instance of the ingress-nginx controller, all instances of the controllers must be aware of which Ingress objects they serve. The <code>ingressClassName</code> field of an Ingress is the way to let the controller know about that.</p> <div class=highlight><pre><span></span><code><span class=go>kubectl explain ingressclass</span>
</code></pre></div> <div class=highlight><pre><span></span><code>KIND: IngressClass
VERSION: networking.k8s.io/v1
DESCRIPTION:
IngressClass represents the class of the Ingress, referenced by the Ingress
Spec. The `ingressclass.kubernetes.io/is-default-class` annotation can be
used to indicate that an IngressClass should be considered default. When a
single IngressClass resource has this annotation set to true, new Ingress
resources without a class specified will be assigned this default class.
FIELDS:
apiVersion &lt;string&gt;
APIVersion defines the versioned schema of this representation of an
object. Servers should convert recognized schemas to the latest internal
value, and may reject unrecognized values. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
kind &lt;string&gt;
Kind is a string value representing the REST resource this object
represents. Servers may infer this from the endpoint the client submits
requests to. Cannot be updated. In CamelCase. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
metadata &lt;Object&gt;
Standard object&#39;s metadata. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
spec &lt;Object&gt;
Spec is the desired state of the IngressClass. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status`
</code></pre></div> <h2 id=what-has-caused-this-change-in-behavior>What has caused this change in behavior?<a class=headerlink href=#what-has-caused-this-change-in-behavior title="Permanent link"></a></h2> <p>There are 2 primary reasons.</p> <h3 id=reason-1>Reason 1<a class=headerlink href=#reason-1 title="Permanent link"></a></h3> <p>Until K8s version 1.21, it was possible to create an Ingress resource using deprecated versions of the Ingress API, such as:</p> <ul> <li><code>extensions/v1beta1</code></li> <li><code>networking.k8s.io/v1beta1</code> You would get a message about deprecation, but the Ingress resource would get created.</li> </ul> <p>From K8s version 1.22 onwards, you can <strong>only</strong> access the Ingress API via the stable, <code>networking.k8s.io/v1</code> API. The reason is explained in the <a href=https://kubernetes.io/blog/2021/07/26/update-with-ingress-nginx/ >official blog on deprecated ingress API versions</a>.</p> <h3 id=reason-2>Reason #2<a class=headerlink href=#reason-2 title="Permanent link"></a></h3> <p>If you are already using the ingress-nginx controller and then upgrade to Kubernetes 1.22, there are several scenarios where your existing Ingress objects will not work how you expect.</p> <p>Read this FAQ to check which scenario matches your use case.</p> <h2 id=what-is-the-ingressclassname-field>What is the <code>ingressClassName</code> field?<a class=headerlink href=#what-is-the-ingressclassname-field title="Permanent link"></a></h2> <p><code>ingressClassName</code> is a field in the spec of an Ingress object.</p> <div class=highlight><pre><span></span><code>kubectl<span class=w> </span>explain<span class=w> </span>ingress.spec.ingressClassName
</code></pre></div> <div class=highlight><pre><span></span><code><span class=go>KIND: Ingress</span>
<span class=go>VERSION: networking.k8s.io/v1</span>
<span class=go>FIELD: ingressClassName &lt;string&gt;</span>
<span class=go>DESCRIPTION:</span>
<span class=go> IngressClassName is the name of the IngressClass cluster resource. The</span>
<span class=go> associated IngressClass defines which controller will implement the</span>
<span class=go> resource. This replaces the deprecated `kubernetes.io/ingress.class`</span>
<span class=go> annotation. For backwards compatibility, when that annotation is set, it</span>
<span class=go> must be given precedence over this field. The controller may emit a warning</span>
<span class=go> if the field and annotation have different values. Implementations of this</span>
<span class=go> API should ignore Ingresses without a class specified. An IngressClass</span>
<span class=go> resource may be marked as default, which can be used to set a default value</span>
<span class=go> for this field. For more information, refer to the IngressClass</span>
<span class=go> documentation.</span>
</code></pre></div> <p>The <code>.spec.ingressClassName</code> behavior has precedence over the deprecated <code>kubernetes.io/ingress.class</code> annotation.</p> <h2 id=i-have-only-one-ingress-controller-in-my-cluster-what-should-i-do>I have only one ingress controller in my cluster. What should I do?<a class=headerlink href=#i-have-only-one-ingress-controller-in-my-cluster-what-should-i-do title="Permanent link"></a></h2> <p>If a single instance of the ingress-nginx controller is the sole Ingress controller running in your cluster, you should add the annotation "ingressclass.kubernetes.io/is-default-class" in your IngressClass, so any new Ingress objects will have this one as default IngressClass.</p> <p>When using Helm, you can enable this annotation by setting <code>.controller.ingressClassResource.default: true</code> in your Helm chart installation's values file.</p> <p>If you have any old Ingress objects remaining without an IngressClass set, you can do one or more of the following to make the ingress-nginx controller aware of the old objects:</p> <ul> <li>You can manually set the <a href=https://kubernetes.io/docs/reference/kubernetes-api/service-resources/ingress-v1/#IngressSpec><code>.spec.ingressClassName</code></a> field in the manifest of your own Ingress resources.</li> <li>You can re-create them after setting the <code>ingressclass.kubernetes.io/is-default-class</code> annotation to <code>true</code> on the IngressClass</li> <li>Alternatively you can make the ingress-nginx controller watch Ingress objects without the ingressClassName field set by starting your ingress-nginx with the flag <a href=#what-is-the-flag-watch-ingress-without-class>--watch-ingress-without-class=true</a>. When using Helm, you can configure your Helm chart installation's values file with <code>.controller.watchIngressWithoutClass: true</code>.</li> </ul> <p>We recommend that you create the IngressClass as shown below:</p> <div class=highlight><pre><span></span><code>---
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
labels:
app.kubernetes.io/component: controller
name: nginx
annotations:
ingressclass.kubernetes.io/is-default-class: &quot;true&quot;
spec:
controller: k8s.io/ingress-nginx
</code></pre></div> <p>and add the value <code>spec.ingressClassName=nginx</code> in your Ingress objects.</p> <h2 id=i-have-many-ingress-objects-in-my-cluster-what-should-i-do>I have many ingress objects in my cluster. What should I do?<a class=headerlink href=#i-have-many-ingress-objects-in-my-cluster-what-should-i-do title="Permanent link"></a></h2> <p>If you have a lot of ingress objects without ingressClass configuration, you can run the ingress controller with the flag <code>--watch-ingress-without-class=true</code>.</p> <h3 id=what-is-the-flag-watch-ingress-without-class>What is the flag <code>--watch-ingress-without-class</code>?<a class=headerlink href=#what-is-the-flag-watch-ingress-without-class title="Permanent link"></a></h3> <p>It's a flag that is passed, as an argument, to the <code>nginx-ingress-controller</code> executable. In the configuration, it looks like this:</p> <div class=highlight><pre><span></span><code><span class=c1># ...</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">--watch-ingress-without-class=true</span>
<span class=w> </span><span class="p p-Indicator">-</span><span class=w> </span><span class="l l-Scalar l-Scalar-Plain">--controller-class=k8s.io/ingress-nginx</span>
<span class=w> </span><span class=c1># ...</span>
<span class=c1># ...</span>
</code></pre></div> <h2 id=i-have-more-than-one-controller-in-my-cluster-and-im-already-using-the-annotation>I have more than one controller in my cluster, and I'm already using the annotation<a class=headerlink href=#i-have-more-than-one-controller-in-my-cluster-and-im-already-using-the-annotation title="Permanent link"></a></h2> <p>No problem. This should still keep working, but we highly recommend you to test! Even though <code>kubernetes.io/ingress.class</code> is deprecated, the ingress-nginx controller still understands that annotation. If you want to follow good practice, you should consider migrating to use IngressClass and <code>.spec.ingressClassName</code>.</p> <h2 id=i-have-more-than-one-controller-running-in-my-cluster-and-i-want-to-use-the-new-api>I have more than one controller running in my cluster, and I want to use the new API<a class=headerlink href=#i-have-more-than-one-controller-running-in-my-cluster-and-i-want-to-use-the-new-api title="Permanent link"></a></h2> <p>In this scenario, you need to create multiple IngressClasses (see the example above).</p> <p>Be aware that IngressClass works in a very specific way: you will need to change the <code>.spec.controller</code> value in your IngressClass and configure the controller to expect the exact same value.</p> <p>Let's see an example, supposing that you have three IngressClasses:</p> <ul> <li>IngressClass <code>ingress-nginx-one</code>, with <code>.spec.controller</code> equal to <code>example.com/ingress-nginx1</code></li> <li>IngressClass <code>ingress-nginx-two</code>, with <code>.spec.controller</code> equal to <code>example.com/ingress-nginx2</code></li> <li>IngressClass <code>ingress-nginx-three</code>, with <code>.spec.controller</code> equal to <code>example.com/ingress-nginx1</code></li> </ul> <p>For private use, you can also use a controller name that doesn't contain a <code>/</code>, e.g. <code>ingress-nginx1</code>.</p> <p>When deploying your ingress controllers, you will have to change the <code>--controller-class</code> field as follows:</p> <ul> <li>Ingress-Nginx A, configured to use controller class name <code>example.com/ingress-nginx1</code></li> <li>Ingress-Nginx B, configured to use controller class name <code>example.com/ingress-nginx2</code></li> </ul> <p>When you create an Ingress object with its <code>ingressClassName</code> set to <code>ingress-nginx-two</code>, only controllers looking for the <code>example.com/ingress-nginx2</code> controller class pay attention to the new object.</p> <p>Given that Ingress-Nginx B is set up that way, it will serve that object, whereas Ingress-Nginx A ignores the new Ingress.</p> <p>Bear in mind that if you start Ingress-Nginx B with the command line argument <code>--watch-ingress-without-class=true</code>, it will serve:</p> <ol> <li>Ingresses without any <code>ingressClassName</code> set</li> <li>Ingresses where the deprecated annotation (<code>kubernetes.io/ingress.class</code>) matches the value set in the command line argument <code>--ingress-class</code></li> <li>Ingresses that refer to any IngressClass that has the same <code>spec.controller</code> as configured in <code>--controller-class</code></li> <li>If you start Ingress-Nginx B with the command line argument <code>--watch-ingress-without-class=true</code> and you run Ingress-Nginx A with the command line argument <code>--watch-ingress-without-class=false</code> then this is a supported configuration. If you have two ingress-nginx controllers for the same cluster, both running with <code>--watch-ingress-without-class=true</code> then there is likely to be a conflict.</li> </ol> <h2 id=why-am-i-seeing-ingress-class-annotation-is-not-equal-to-the-expected-by-ingress-controller-in-my-controller-logs>Why am I seeing "ingress class annotation is not equal to the expected by Ingress Controller" in my controller logs?<a class=headerlink href=#why-am-i-seeing-ingress-class-annotation-is-not-equal-to-the-expected-by-ingress-controller-in-my-controller-logs title="Permanent link"></a></h2> <p>It is highly likely that you will also see the name of the ingress resource in the same error message. This error message has been observed on use the deprecated annotation (<code>kubernetes.io/ingress.class</code>) in an Ingress resource manifest. It is recommended to use the <code>.spec.ingressClassName</code> field of the Ingress resource, to specify the name of the IngressClass of the Ingress you are defining.</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>
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