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<a href="https://github.com/kubernetes/ingress-nginx/edit/master/docs/deploy/rbac.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
<h1 id="role-based-access-control-rbac">Role Based Access Control (RBAC)<a class="headerlink" href="#role-based-access-control-rbac" title="Permanent link">&para;</a></h1>
<h2 id="overview">Overview<a class="headerlink" href="#overview" title="Permanent link">&para;</a></h2>
<p>This example applies to nginx-ingress-controllers being deployed in an environment with RBAC enabled.</p>
<p>Role Based Access Control is comprised of four layers:</p>
<ol>
<li><code class="codehilite">ClusterRole</code> - permissions assigned to a role that apply to an entire cluster</li>
<li><code class="codehilite">ClusterRoleBinding</code> - binding a ClusterRole to a specific account</li>
<li><code class="codehilite">Role</code> - permissions assigned to a role that apply to a specific namespace</li>
<li><code class="codehilite">RoleBinding</code> - binding a Role to a specific account</li>
</ol>
<p>In order for RBAC to be applied to an nginx-ingress-controller, that controller
should be assigned to a <code class="codehilite">ServiceAccount</code>. That <code class="codehilite">ServiceAccount</code> should be
bound to the <code class="codehilite">Role</code>s and <code class="codehilite">ClusterRole</code>s defined for the nginx-ingress-controller.</p>
<h2 id="service-accounts-created-in-this-example">Service Accounts created in this example<a class="headerlink" href="#service-accounts-created-in-this-example" title="Permanent link">&para;</a></h2>
<p>One ServiceAccount is created in this example, <code class="codehilite">nginx-ingress-serviceaccount</code>.</p>
<h2 id="permissions-granted-in-this-example">Permissions Granted in this example<a class="headerlink" href="#permissions-granted-in-this-example" title="Permanent link">&para;</a></h2>
<p>There are two sets of permissions defined in this example. Cluster-wide
permissions defined by the <code class="codehilite">ClusterRole</code> named <code class="codehilite">nginx-ingress-clusterrole</code>, and
namespace specific permissions defined by the <code class="codehilite">Role</code> named <code class="codehilite">nginx-ingress-role</code>.</p>
<h3 id="cluster-permissions">Cluster Permissions<a class="headerlink" href="#cluster-permissions" title="Permanent link">&para;</a></h3>
<p>These permissions are granted in order for the nginx-ingress-controller to be
able to function as an ingress across the cluster. These permissions are
granted to the ClusterRole named <code class="codehilite">nginx-ingress-clusterrole</code></p>
<ul>
<li><code class="codehilite">configmaps</code>, <code class="codehilite">endpoints</code>, <code class="codehilite">nodes</code>, <code class="codehilite">pods</code>, <code class="codehilite">secrets</code>: list, watch</li>
<li><code class="codehilite">nodes</code>: get</li>
<li><code class="codehilite">services</code>, <code class="codehilite">ingresses</code>: get, list, watch</li>
<li><code class="codehilite">events</code>: create, patch</li>
<li><code class="codehilite">ingresses/status</code>: update</li>
</ul>
<h3 id="namespace-permissions">Namespace Permissions<a class="headerlink" href="#namespace-permissions" title="Permanent link">&para;</a></h3>
<p>These permissions are granted specific to the nginx-ingress namespace. These
permissions are granted to the Role named <code class="codehilite">nginx-ingress-role</code></p>
<ul>
<li><code class="codehilite">configmaps</code>, <code class="codehilite">pods</code>, <code class="codehilite">secrets</code>: get</li>
<li><code class="codehilite">endpoints</code>: get</li>
</ul>
<p>Furthermore to support leader-election, the nginx-ingress-controller needs to
have access to a <code class="codehilite">configmap</code> using the resourceName <code class="codehilite">ingress-controller-leader-nginx</code></p>
<blockquote>
<p>Note that resourceNames can NOT be used to limit requests using the “create”
verb because authorizers only have access to information that can be obtained
from the request URL, method, and headers (resource names in a “create” request
are part of the request body).</p>
</blockquote>
<ul>
<li><code class="codehilite">configmaps</code>: get, update (for resourceName <code class="codehilite">ingress-controller-leader-nginx</code>)</li>
<li><code class="codehilite">configmaps</code>: create</li>
</ul>
<p>This resourceName is the concatenation of the <code class="codehilite">election-id</code> and the
<code class="codehilite">ingress-class</code> as defined by the ingress-controller, which defaults to:</p>
<ul>
<li><code class="codehilite">election-id</code>: <code class="codehilite">ingress-controller-leader</code></li>
<li><code class="codehilite">ingress-class</code>: <code class="codehilite">nginx</code></li>
<li><code class="codehilite">resourceName</code> : <code class="codehilite">&lt;election-id&gt;-&lt;ingress-class&gt;</code></li>
</ul>
<p>Please adapt accordingly if you overwrite either parameter when launching the
nginx-ingress-controller.</p>
<h3 id="bindings">Bindings<a class="headerlink" href="#bindings" title="Permanent link">&para;</a></h3>
<p>The ServiceAccount <code class="codehilite">nginx-ingress-serviceaccount</code> is bound to the Role
<code class="codehilite">nginx-ingress-role</code> and the ClusterRole <code class="codehilite">nginx-ingress-clusterrole</code>.</p>
<p>The serviceAccountName associated with the containers in the deployment must
match the serviceAccount. The namespace references in the Deployment metadata,
container arguments, and POD_NAMESPACE should be in the nginx-ingress namespace.</p>
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