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typhoon/advanced/worker-pools/index.html
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<h1 id="worker-pools">Worker Pools<a class="headerlink" href="#worker-pools" title="Permanent link">&para;</a></h1>
<p>Typhoon AWS, Azure, and Google Cloud allow additional groups of workers to be defined and joined to a cluster. For example, add worker pools of instances with different types, disk sizes, Container Linux channels, or preemptibility modes.</p>
<p>Internal Terraform Modules:</p>
<ul>
<li><code>aws/flatcar-linux/kubernetes/workers</code></li>
<li><code>aws/fedora-coreos/kubernetes/workers</code></li>
<li><code>azure/flatcar-linux/kubernetes/workers</code></li>
<li><code>azure/fedora-coreos/kubernetes/workers</code></li>
<li><code>google-cloud/flatcar-linux/kubernetes/workers</code></li>
<li><code>google-cloud/fedora-coreos/kubernetes/workers</code></li>
</ul>
<h2 id="aws">AWS<a class="headerlink" href="#aws" title="Permanent link">&para;</a></h2>
<p>Create a cluster following the AWS <a href="../../flatcar-linux/aws/#cluster">tutorial</a>. Define a worker pool using the AWS internal <code>workers</code> module.</p>
<div class="tabbed-set tabbed-alternate" data-tabs="1:2"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">Fedora CoreOS</label><label for="__tabbed_1_2">Flatcar Linux</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;tempest-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # AWS</span>
<span class="w"> </span><span class="na">vpc_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.vpc_id</span><span class="w"></span>
<span class="w"> </span><span class="na">subnet_ids</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.subnet_ids</span><span class="w"></span>
<span class="w"> </span><span class="na">security_groups</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.worker_security_groups</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;tempest-pool&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">instance_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;m5.large&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_stream</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;next&quot;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;tempest-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # AWS</span>
<span class="w"> </span><span class="na">vpc_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.vpc_id</span><span class="w"></span>
<span class="w"> </span><span class="na">subnet_ids</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.subnet_ids</span><span class="w"></span>
<span class="w"> </span><span class="na">security_groups</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.worker_security_groups</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;tempest-pool&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.tempest.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">instance_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;m5.large&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_image</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;flatcar-beta&quot;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
</div>
</div>
<p>Apply the change.</p>
<div class="highlight"><pre><span></span><code>terraform apply
</code></pre></div>
<p>Verify an auto-scaling group of workers joins the cluster within a few minutes.</p>
<h3 id="variables">Variables<a class="headerlink" href="#variables" title="Permanent link">&para;</a></h3>
<p>The AWS internal <code>workers</code> module supports a number of <a href="https://github.com/poseidon/typhoon/blob/master/aws/flatcar-linux/kubernetes/workers/variables.tf">variables</a>.</p>
<h4 id="required">Required<a class="headerlink" href="#required" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">name</td>
<td align="left">Unique name (distinct from cluster name)</td>
<td align="left">"tempest-m5s"</td>
</tr>
<tr>
<td align="left">vpc_id</td>
<td align="left">Must be set to <code>vpc_id</code> output by cluster</td>
<td align="left">module.cluster.vpc_id</td>
</tr>
<tr>
<td align="left">subnet_ids</td>
<td align="left">Must be set to <code>subnet_ids</code> output by cluster</td>
<td align="left">module.cluster.subnet_ids</td>
</tr>
<tr>
<td align="left">security_groups</td>
<td align="left">Must be set to <code>worker_security_groups</code> output by cluster</td>
<td align="left">module.cluster.worker_security_groups</td>
</tr>
<tr>
<td align="left">kubeconfig</td>
<td align="left">Must be set to <code>kubeconfig</code> output by cluster</td>
<td align="left">module.cluster.kubeconfig</td>
</tr>
<tr>
<td align="left">ssh_authorized_key</td>
<td align="left">SSH public key for user 'core'</td>
<td align="left">"ssh-ed25519 AAAAB3NZ..."</td>
</tr>
</tbody>
</table>
<h4 id="optional">Optional<a class="headerlink" href="#optional" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Default</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">worker_count</td>
<td align="left">Number of instances</td>
<td align="left">1</td>
<td align="left">3</td>
</tr>
<tr>
<td align="left">instance_type</td>
<td align="left">EC2 instance type</td>
<td align="left">"t3.small"</td>
<td align="left">"t3.medium"</td>
</tr>
<tr>
<td align="left">os_image</td>
<td align="left">AMI channel for a Container Linux derivative</td>
<td align="left">"flatcar-stable"</td>
<td align="left">flatcar-stable, flatcar-beta, flatcar-alpha</td>
</tr>
<tr>
<td align="left">os_stream</td>
<td align="left">Fedora CoreOS stream for compute instances</td>
<td align="left">"stable"</td>
<td align="left">"testing", "next"</td>
</tr>
<tr>
<td align="left">disk_size</td>
<td align="left">Size of the EBS volume in GB</td>
<td align="left">40</td>
<td align="left">100</td>
</tr>
<tr>
<td align="left">disk_type</td>
<td align="left">Type of the EBS volume</td>
<td align="left">"gp3"</td>
<td align="left">standard, gp2, gp3, io1</td>
</tr>
<tr>
<td align="left">disk_iops</td>
<td align="left">IOPS of the EBS volume</td>
<td align="left">0 (i.e. auto)</td>
<td align="left">400</td>
</tr>
<tr>
<td align="left">spot_price</td>
<td align="left">Spot price in USD for worker instances or 0 to use on-demand instances</td>
<td align="left">0</td>
<td align="left">0.10</td>
</tr>
<tr>
<td align="left">snippets</td>
<td align="left">Fedora CoreOS or Container Linux Config snippets</td>
<td align="left">[]</td>
<td align="left"><a href="/advanced/customization/">examples</a></td>
</tr>
<tr>
<td align="left">service_cidr</td>
<td align="left">Must match <code>service_cidr</code> of cluster</td>
<td align="left">"10.3.0.0/16"</td>
<td align="left">"10.3.0.0/24"</td>
</tr>
<tr>
<td align="left">node_labels</td>
<td align="left">List of initial node labels</td>
<td align="left">[]</td>
<td align="left">["worker-pool=foo"]</td>
</tr>
<tr>
<td align="left">node_taints</td>
<td align="left">List of initial node taints</td>
<td align="left">[]</td>
<td align="left">["role=gpu:NoSchedule"]</td>
</tr>
</tbody>
</table>
<p>Check the list of valid <a href="https://aws.amazon.com/ec2/instance-types/">instance types</a> or per-region and per-type <a href="https://aws.amazon.com/ec2/spot/pricing/">spot prices</a>.</p>
<h2 id="azure">Azure<a class="headerlink" href="#azure" title="Permanent link">&para;</a></h2>
<p>Create a cluster following the Azure <a href="../../flatcar-linux/azure/#cluster">tutorial</a>. Define a worker pool using the Azure internal <code>workers</code> module.</p>
<div class="tabbed-set tabbed-alternate" data-tabs="2:2"><input checked="checked" id="__tabbed_2_1" name="__tabbed_2" type="radio" /><input id="__tabbed_2_2" name="__tabbed_2" type="radio" /><div class="tabbed-labels"><label for="__tabbed_2_1">Fedora CoreOS</label><label for="__tabbed_2_2">Flatcar Linux</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;ramius-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//azure/fedora-coreos/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # Azure</span>
<span class="w"> </span><span class="na">region</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.region</span><span class="w"></span>
<span class="w"> </span><span class="na">resource_group_name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.resource_group_name</span><span class="w"></span>
<span class="w"> </span><span class="na">subnet_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.subnet_id</span><span class="w"></span>
<span class="w"> </span><span class="na">security_group_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.security_group_id</span><span class="w"></span>
<span class="w"> </span><span class="na">backend_address_pool_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.backend_address_pool_id</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;ramius-spot&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">vm_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;Standard_F4&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">priority</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;Spot&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_image</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;/subscriptions/some/path/Microsoft.Compute/images/fedora-coreos-31.20200323.3.2&quot;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;ramius-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # Azure</span>
<span class="w"> </span><span class="na">region</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.region</span><span class="w"></span>
<span class="w"> </span><span class="na">resource_group_name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.resource_group_name</span><span class="w"></span>
<span class="w"> </span><span class="na">subnet_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.subnet_id</span><span class="w"></span>
<span class="w"> </span><span class="na">security_group_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.security_group_id</span><span class="w"></span>
<span class="w"> </span><span class="na">backend_address_pool_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.backend_address_pool_id</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;ramius-spot&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.ramius.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">vm_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;Standard_F4&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">priority</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;Spot&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_image</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;flatcar-beta&quot;</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
</div>
</div>
<p>Apply the change.</p>
<div class="highlight"><pre><span></span><code>terraform apply
</code></pre></div>
<p>Verify a scale set of workers joins the cluster within a few minutes.</p>
<h3 id="variables_1">Variables<a class="headerlink" href="#variables_1" title="Permanent link">&para;</a></h3>
<p>The Azure internal <code>workers</code> module supports a number of <a href="https://github.com/poseidon/typhoon/blob/master/azure/flatcar-linux/kubernetes/workers/variables.tf">variables</a>.</p>
<h4 id="required_1">Required<a class="headerlink" href="#required_1" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">name</td>
<td align="left">Unique name (distinct from cluster name)</td>
<td align="left">"ramius-f4"</td>
</tr>
<tr>
<td align="left">region</td>
<td align="left">Must be set to <code>region</code> output by cluster</td>
<td align="left">module.cluster.region</td>
</tr>
<tr>
<td align="left">resource_group_name</td>
<td align="left">Must be set to <code>resource_group_name</code> output by cluster</td>
<td align="left">module.cluster.resource_group_name</td>
</tr>
<tr>
<td align="left">subnet_id</td>
<td align="left">Must be set to <code>subnet_id</code> output by cluster</td>
<td align="left">module.cluster.subnet_id</td>
</tr>
<tr>
<td align="left">security_group_id</td>
<td align="left">Must be set to <code>security_group_id</code> output by cluster</td>
<td align="left">module.cluster.security_group_id</td>
</tr>
<tr>
<td align="left">backend_address_pool_id</td>
<td align="left">Must be set to <code>backend_address_pool_id</code> output by cluster</td>
<td align="left">module.cluster.backend_address_pool_id</td>
</tr>
<tr>
<td align="left">kubeconfig</td>
<td align="left">Must be set to <code>kubeconfig</code> output by cluster</td>
<td align="left">module.cluster.kubeconfig</td>
</tr>
<tr>
<td align="left">ssh_authorized_key</td>
<td align="left">SSH public key for user 'core'</td>
<td align="left">"ssh-ed25519 AAAAB3NZ..."</td>
</tr>
</tbody>
</table>
<h4 id="optional_1">Optional<a class="headerlink" href="#optional_1" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Default</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">worker_count</td>
<td align="left">Number of instances</td>
<td align="left">1</td>
<td align="left">3</td>
</tr>
<tr>
<td align="left">vm_type</td>
<td align="left">Machine type for instances</td>
<td align="left">"Standard_DS1_v2"</td>
<td align="left">See below</td>
</tr>
<tr>
<td align="left">os_image</td>
<td align="left">Channel for a Container Linux derivative</td>
<td align="left">"flatcar-stable"</td>
<td align="left">flatcar-stable, flatcar-beta, flatcar-alpha</td>
</tr>
<tr>
<td align="left">priority</td>
<td align="left">Set priority to Spot to use reduced cost surplus capacity, with the tradeoff that instances can be deallocated at any time</td>
<td align="left">"Regular"</td>
<td align="left">"Spot"</td>
</tr>
<tr>
<td align="left">snippets</td>
<td align="left">Container Linux Config snippets</td>
<td align="left">[]</td>
<td align="left"><a href="/advanced/customization/">examples</a></td>
</tr>
<tr>
<td align="left">service_cidr</td>
<td align="left">CIDR IPv4 range to assign to Kubernetes services</td>
<td align="left">"10.3.0.0/16"</td>
<td align="left">"10.3.0.0/24"</td>
</tr>
<tr>
<td align="left">node_labels</td>
<td align="left">List of initial node labels</td>
<td align="left">[]</td>
<td align="left">["worker-pool=foo"]</td>
</tr>
<tr>
<td align="left">node_taints</td>
<td align="left">List of initial node taints</td>
<td align="left">[]</td>
<td align="left">["role=gpu:NoSchedule"]</td>
</tr>
</tbody>
</table>
<p>Check the list of valid <a href="https://azure.microsoft.com/en-us/pricing/details/virtual-machines/linux/">machine types</a> and their <a href="https://docs.microsoft.com/en-us/azure/virtual-machines/linux/sizes-general">specs</a>. Use <code>az vm list-skus</code> to get the identifier.</p>
<h2 id="google-cloud">Google Cloud<a class="headerlink" href="#google-cloud" title="Permanent link">&para;</a></h2>
<p>Create a cluster following the Google Cloud <a href="../../flatcar-linux/google-cloud/#cluster">tutorial</a>. Define a worker pool using the Google Cloud internal <code>workers</code> module.</p>
<div class="tabbed-set tabbed-alternate" data-tabs="3:2"><input checked="checked" id="__tabbed_3_1" name="__tabbed_3" type="radio" /><input id="__tabbed_3_2" name="__tabbed_3" type="radio" /><div class="tabbed-labels"><label for="__tabbed_3_1">Fedora CoreOS</label><label for="__tabbed_3_2">Flatcar Linux</label></div>
<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;yavin-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # Google Cloud</span>
<span class="w"> </span><span class="na">region</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;europe-west2&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">network</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.yavin.network_name</span><span class="w"></span>
<span class="w"> </span><span class="na">cluster_name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;yavin&quot;</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;yavin-16x&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.yavin.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">machine_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;n1-standard-16&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_stream</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;testing&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">preemptible</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">true</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><span class="kr">module</span><span class="w"> </span><span class="nv">&quot;yavin-worker-pool&quot;</span><span class="w"> </span><span class="p">{</span><span class="w"></span>
<span class="w"> </span><span class="na">source</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;git::https://github.com/poseidon/typhoon//google-cloud/flatcar-linux/kubernetes/workers?ref=v1.24.3&quot;</span><span class="c1"></span>
<span class="c1"> # Google Cloud</span>
<span class="w"> </span><span class="na">region</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;europe-west2&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">network</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.yavin.network_name</span><span class="w"></span>
<span class="w"> </span><span class="na">cluster_name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;yavin&quot;</span><span class="c1"></span>
<span class="c1"> # configuration</span>
<span class="w"> </span><span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;yavin-16x&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">kubeconfig</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">module.yavin.kubeconfig</span><span class="w"></span>
<span class="w"> </span><span class="na">ssh_authorized_key</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="nv">var.ssh_authorized_key</span><span class="c1"></span>
<span class="c1"> # optional</span>
<span class="w"> </span><span class="na">worker_count</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="m">2</span><span class="w"></span>
<span class="w"> </span><span class="na">machine_type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;n1-standard-16&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">os_image</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s2">&quot;flatcar-stable&quot;</span><span class="w"></span>
<span class="w"> </span><span class="na">preemptible</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="no">true</span><span class="w"></span>
<span class="p">}</span><span class="w"></span>
</code></pre></div>
</div>
</div>
</div>
<p>Apply the change.</p>
<div class="highlight"><pre><span></span><code>terraform apply
</code></pre></div>
<p>Verify a managed instance group of workers joins the cluster within a few minutes.</p>
<div class="highlight"><pre><span></span><code>$ kubectl get nodes
NAME STATUS AGE VERSION
yavin-controller-0.c.example-com.internal Ready 6m v1.24.3
yavin-worker-jrbf.c.example-com.internal Ready 5m v1.24.3
yavin-worker-mzdm.c.example-com.internal Ready 5m v1.24.3
yavin-16x-worker-jrbf.c.example-com.internal Ready 3m v1.24.3
yavin-16x-worker-mzdm.c.example-com.internal Ready 3m v1.24.3
</code></pre></div>
<h3 id="variables_2">Variables<a class="headerlink" href="#variables_2" title="Permanent link">&para;</a></h3>
<p>The Google Cloud internal <code>workers</code> module supports a number of <a href="https://github.com/poseidon/typhoon/blob/master/google-cloud/flatcar-linux/kubernetes/workers/variables.tf">variables</a>.</p>
<h4 id="required_2">Required<a class="headerlink" href="#required_2" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">name</td>
<td align="left">Unique name (distinct from cluster name)</td>
<td align="left">"yavin-16x"</td>
</tr>
<tr>
<td align="left">cluster_name</td>
<td align="left">Must be set to <code>cluster_name</code> of cluster</td>
<td align="left">"yavin"</td>
</tr>
<tr>
<td align="left">region</td>
<td align="left">Region for the worker pool instances. May differ from the cluster's region</td>
<td align="left">"europe-west2"</td>
</tr>
<tr>
<td align="left">network</td>
<td align="left">Must be set to <code>network_name</code> output by cluster</td>
<td align="left">module.cluster.network_name</td>
</tr>
<tr>
<td align="left">kubeconfig</td>
<td align="left">Must be set to <code>kubeconfig</code> output by cluster</td>
<td align="left">module.cluster.kubeconfig</td>
</tr>
<tr>
<td align="left">os_image</td>
<td align="left">Container Linux image for compute instances</td>
<td align="left">"uploaded-flatcar-image"</td>
</tr>
<tr>
<td align="left">ssh_authorized_key</td>
<td align="left">SSH public key for user 'core'</td>
<td align="left">"ssh-ed25519 AAAAB3NZ..."</td>
</tr>
</tbody>
</table>
<p>Check the list of regions <a href="https://cloud.google.com/compute/docs/regions-zones/regions-zones">docs</a> or with <code>gcloud compute regions list</code>.</p>
<h4 id="optional_2">Optional<a class="headerlink" href="#optional_2" title="Permanent link">&para;</a></h4>
<table>
<thead>
<tr>
<th align="left">Name</th>
<th align="left">Description</th>
<th align="left">Default</th>
<th align="left">Example</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left">worker_count</td>
<td align="left">Number of instances</td>
<td align="left">1</td>
<td align="left">3</td>
</tr>
<tr>
<td align="left">machine_type</td>
<td align="left">Compute instance machine type</td>
<td align="left">"n1-standard-1"</td>
<td align="left">See below</td>
</tr>
<tr>
<td align="left">os_stream</td>
<td align="left">Fedora CoreOS stream for compute instances</td>
<td align="left">"stable"</td>
<td align="left">"testing", "next"</td>
</tr>
<tr>
<td align="left">disk_size</td>
<td align="left">Size of the disk in GB</td>
<td align="left">40</td>
<td align="left">100</td>
</tr>
<tr>
<td align="left">preemptible</td>
<td align="left">If true, Compute Engine will terminate instances randomly within 24 hours</td>
<td align="left">false</td>
<td align="left">true</td>
</tr>
<tr>
<td align="left">snippets</td>
<td align="left">Container Linux Config snippets</td>
<td align="left">[]</td>
<td align="left"><a href="/advanced/customization/">examples</a></td>
</tr>
<tr>
<td align="left">service_cidr</td>
<td align="left">Must match <code>service_cidr</code> of cluster</td>
<td align="left">"10.3.0.0/16"</td>
<td align="left">"10.3.0.0/24"</td>
</tr>
<tr>
<td align="left">node_labels</td>
<td align="left">List of initial node labels</td>
<td align="left">[]</td>
<td align="left">["worker-pool=foo"]</td>
</tr>
<tr>
<td align="left">node_taints</td>
<td align="left">List of initial node taints</td>
<td align="left">[]</td>
<td align="left">["role=gpu:NoSchedule"]</td>
</tr>
</tbody>
</table>
<p>Check the list of valid <a href="https://cloud.google.com/compute/docs/machine-types">machine types</a>.</p>
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