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<a href="#getting-the-kubeconfig-for-a-newly-created-cluster" class="md-nav__link">
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Getting the kubeconfig for a newly created cluster
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Removing cluster details from the kubeconfig
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Handling multiple clusters
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<a href="https://github.com/rancher/k3d/edit/master/docs/usage/kubeconfig.md" title="Edit this page" class="md-content__button md-icon">
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<h1 id="handling-kubeconfigs">Handling Kubeconfigs<a class="headerlink" href="#handling-kubeconfigs" title="Permanent link">¶</a></h1>
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<p>By default, k3d will update your default kubeconfig with your new cluster’s details and set the current-context to it (can be disabled).
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To get a kubeconfig set up for you to connect to a k3d cluster without this automatism, you can go different ways.</p>
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<details class="question"><summary>What is the default kubeconfig?</summary><p>We determine the path of the used or default kubeconfig in two ways:</p>
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<ol>
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<li>Using the <code>KUBECONFIG</code> environment variable, if it specifies <em>exactly one</em> file</li>
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<li>Using the default path (e.g. on Linux it’s <code class="highlight"><span class="nv">$HOME</span>/.kube/config</code>)</li>
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</ol>
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</details>
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<h2 id="getting-the-kubeconfig-for-a-newly-created-cluster">Getting the kubeconfig for a newly created cluster<a class="headerlink" href="#getting-the-kubeconfig-for-a-newly-created-cluster" title="Permanent link">¶</a></h2>
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<ol>
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<li>Create a new kubeconfig file <strong>after</strong> cluster creation<ul>
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<li><code class="highlight">k3d kubeconfig write mycluster</code></li>
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<li><em>Note:</em> this will create (or update) the file <code>$HOME/.k3d/kubeconfig-mycluster.yaml</code></li>
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<li><em>Tip:</em> Use it: <code class="highlight"><span class="nb">export</span> <span class="nv">KUBECONFIG</span><span class="o">=</span><span class="k">$(</span>k3d kubeconfig write mycluster<span class="k">)</span></code></li>
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<li><em>Note 2</em>: alternatively you can use <code class="highlight">k3d kubeconfig get mycluster > some-file.yaml</code></li>
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</ul>
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</li>
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<li>Update your default kubeconfig <strong>upon</strong> cluster creation (DEFAULT)<ul>
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<li><code class="highlight">k3d cluster create mycluster --kubeconfig-update-default</code><ul>
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<li><em>Note:</em> this won’t switch the current-context (append <code>--kubeconfig-switch-context</code> to do so)</li>
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</ul>
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</li>
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</ul>
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</li>
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<li>Update your default kubeconfig <strong>after</strong> cluster creation<ul>
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<li><code class="highlight">k3d kubeconfig merge mycluster --kubeconfig-merge-default</code><ul>
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<li><em>Note:</em> this won’t switch the current-context (append <code>--kubeconfig-switch-context</code> to do so)</li>
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</ul>
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</li>
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</ul>
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</li>
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<li>Update a different kubeconfig <strong>after</strong> cluster creation<ul>
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<li><code class="highlight">k3d kubeconfig merge mycluster --output some/other/file.yaml</code><ul>
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<li><em>Note:</em> this won’t switch the current-context</li>
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</ul>
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</li>
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<li>The file will be created if it doesn’t exist</li>
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</ul>
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</li>
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</ol>
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<div class="admonition info">
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<p class="admonition-title">Switching the current context</p>
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<p>None of the above options switch the current-context by default.
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This is intended to be least intrusive, since the current-context has a global effect.
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You can switch the current-context directly with the <code>kubeconfig merge</code> command by adding the <code>--kubeconfig-switch-context</code> flag.</p>
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</div>
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<h2 id="removing-cluster-details-from-the-kubeconfig">Removing cluster details from the kubeconfig<a class="headerlink" href="#removing-cluster-details-from-the-kubeconfig" title="Permanent link">¶</a></h2>
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<p><code class="highlight">k3d cluster delete mycluster</code> will always remove the details for <code>mycluster</code> from the default kubeconfig.
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It will also delete the respective kubeconfig file in <code>$HOME/.k3d/</code> if it exists.</p>
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<h2 id="handling-multiple-clusters">Handling multiple clusters<a class="headerlink" href="#handling-multiple-clusters" title="Permanent link">¶</a></h2>
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<p><code>k3d kubeconfig merge</code> let’s you specify one or more clusters via arguments <em>or</em> all via <code>--all</code>.
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All kubeconfigs will then be merged into a single file if <code>--kubeconfig-merge-default</code> or <code>--output</code> is specified.
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If none of those two flags was specified, a new file will be created per cluster and the merged path (e.g. <code>$HOME/.k3d/kubeconfig-cluster1.yaml:$HOME/.k3d/cluster2.yaml</code>) will be returned.
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Note, that with multiple cluster specified, the <code>--kubeconfig-switch-context</code> flag will change the current context to the cluster which was last in the list.</p>
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Last update: <span class="git-revision-date-localized-plugin git-revision-date-localized-plugin-date">January 5, 2021</span>
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