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<a href="https://github.com/kubernetes/ingress-nginx/edit/master/docs/deploy/rbac.md" title="Edit this page" class="md-content__button md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z"/></svg>
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<h1 id="role-based-access-control-rbac">Role Based Access Control (RBAC)<a class="headerlink" href="#role-based-access-control-rbac" title="Permanent link"> ¶</a></h1>
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<h2 id="overview">Overview<a class="headerlink" href="#overview" title="Permanent link"> ¶</a></h2>
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<p>This example applies to nginx-ingress-controllers being deployed in an environment with RBAC enabled.</p>
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<p>Role Based Access Control is comprised of four layers:</p>
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<ol>
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<li><code>ClusterRole</code> - permissions assigned to a role that apply to an entire cluster</li>
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<li><code>ClusterRoleBinding</code> - binding a ClusterRole to a specific account</li>
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<li><code>Role</code> - permissions assigned to a role that apply to a specific namespace</li>
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<li><code>RoleBinding</code> - binding a Role to a specific account</li>
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</ol>
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<p>In order for RBAC to be applied to an nginx-ingress-controller, that controller
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should be assigned to a <code>ServiceAccount</code>. That <code>ServiceAccount</code> should be
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bound to the <code>Role</code>s and <code>ClusterRole</code>s defined for the nginx-ingress-controller.</p>
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<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"> ¶</a></h2>
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<p>One ServiceAccount is created in this example, <code>nginx-ingress-serviceaccount</code>.</p>
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<h2 id="permissions-granted-in-this-example">Permissions Granted in this example<a class="headerlink" href="#permissions-granted-in-this-example" title="Permanent link"> ¶</a></h2>
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<p>There are two sets of permissions defined in this example. Cluster-wide
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permissions defined by the <code>ClusterRole</code> named <code>nginx-ingress-clusterrole</code>, and
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namespace specific permissions defined by the <code>Role</code> named <code>nginx-ingress-role</code>.</p>
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<h3 id="cluster-permissions">Cluster Permissions<a class="headerlink" href="#cluster-permissions" title="Permanent link"> ¶</a></h3>
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<p>These permissions are granted in order for the nginx-ingress-controller to be
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able to function as an ingress across the cluster. These permissions are
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granted to the ClusterRole named <code>nginx-ingress-clusterrole</code></p>
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<ul>
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<li><code>configmaps</code>, <code>endpoints</code>, <code>nodes</code>, <code>pods</code>, <code>secrets</code>: list, watch</li>
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<li><code>nodes</code>: get</li>
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<li><code>services</code>, <code>ingresses</code>: get, list, watch</li>
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<li><code>events</code>: create, patch</li>
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<li><code>ingresses/status</code>: update</li>
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</ul>
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<h3 id="namespace-permissions">Namespace Permissions<a class="headerlink" href="#namespace-permissions" title="Permanent link"> ¶</a></h3>
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<p>These permissions are granted specific to the nginx-ingress namespace. These
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permissions are granted to the Role named <code>nginx-ingress-role</code></p>
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<ul>
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<li><code>configmaps</code>, <code>pods</code>, <code>secrets</code>: get</li>
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<li><code>endpoints</code>: get</li>
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</ul>
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<p>Furthermore to support leader-election, the nginx-ingress-controller needs to
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have access to a <code>configmap</code> using the resourceName <code>ingress-controller-leader-nginx</code></p>
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<blockquote>
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<p>Note that resourceNames can NOT be used to limit requests using the “create”
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verb because authorizers only have access to information that can be obtained
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from the request URL, method, and headers (resource names in a “create” request
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are part of the request body).</p>
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</blockquote>
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<ul>
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<li><code>configmaps</code>: get, update (for resourceName <code>ingress-controller-leader-nginx</code>)</li>
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<li><code>configmaps</code>: create</li>
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</ul>
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<p>This resourceName is the concatenation of the <code>election-id</code> and the
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<code>ingress-class</code> as defined by the ingress-controller, which defaults to:</p>
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<ul>
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<li><code>election-id</code>: <code>ingress-controller-leader</code></li>
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<li><code>ingress-class</code>: <code>nginx</code></li>
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<li><code>resourceName</code> : <code><election-id>-<ingress-class></code></li>
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</ul>
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<p>Please adapt accordingly if you overwrite either parameter when launching the
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nginx-ingress-controller.</p>
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<h3 id="bindings">Bindings<a class="headerlink" href="#bindings" title="Permanent link"> ¶</a></h3>
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<p>The ServiceAccount <code>nginx-ingress-serviceaccount</code> is bound to the Role
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<code>nginx-ingress-role</code> and the ClusterRole <code>nginx-ingress-clusterrole</code>.</p>
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<p>The serviceAccountName associated with the containers in the deployment must
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match the serviceAccount. The namespace references in the Deployment metadata,
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container arguments, and POD_NAMESPACE should be in the nginx-ingress namespace.</p>
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