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a Kubernetes add-on for discovering and advertising hardware features and system configuration in the cluster."> <i class="fa fa-home"></i> Node Feature Discovery </a> </div> <span class="version">master</span> <form class="search pt-2" action="/node-feature-discovery/master/search.html" method="get" autocomplete="off"> <input class="form-control input-block input-sm" type="text" name="q" placeholder="Search docs..."> </form> </div> <div class="toctree py-2" data-spy="affix" role="navigation" aria-label="main navigation"> <ul> </ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/master/get-started/"> Get started </a><ul> <li class="toc level-1 " data-sort="1" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/get-started/introduction.html">1. Introduction</a> </li> <li class="toc level-1 " data-sort="2" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/get-started/quick-start.html">2. Quick Start</a> </li> <li class="toc level-1 current" data-sort="3" data-level="1"> <a class="d-flex flex-items-baseline current" href="/node-feature-discovery/master/get-started/deployment-and-usage.html">3. Deployment and Usage</a> </li> <li class="toc level-1 " data-sort="4" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/get-started/features.html">4. Feature Discovery</a> </li> <li class="toc level-1 " data-sort="5" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/get-started/examples-and-demos.html">5. Examples and Demos</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/master/advanced/"> Advanced </a><ul> <li class="toc level-1 " data-sort="1" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/advanced/developer-guide.html">1. Developer Guide</a> </li> <li class="toc level-1 " data-sort="2" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/advanced/master-commandline-reference.html">2. Master Cmdline Reference</a> </li> <li class="toc level-1 " data-sort="3" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/master/advanced/worker-commandline-reference.html">3. Worker Cmdline Reference</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/master/contributing/"> Contributing </a><ul> </ul> </div> </div> </div> <div class="content-wrap"> <div class="header d-flex flex-justify-between p-2 hide-lg hide-xl" aria-label="top navigation"> <button id="toggle" class="btn-octicon p-2 m-0 text-white" type="button"> <i class="fa fa-bars"></i> </button> <div class="title flex-1 d-flex flex-justify-center"> <a class="h4 no-underline py-1 px-2 rounded-1" href="/node-feature-discovery/master/">Node Feature Discovery</a> </div> </div> <div class="content p-3 p-sm-5"> <div class="navigation-top d-flex flex-justify-between"> <ul class="breadcrumb" role="navigation" aria-label="breadcrumbs navigation"> <li class="breadcrumb-item"> <a class="no-underline" href="/node-feature-discovery/master/" title="/"> <i class="fa fa-home"></i> </a> </li><li class="breadcrumb-item" ><a href="/node-feature-discovery/master/get-started/">get-started</a></li><li class="breadcrumb-item" aria-current="page">deployment-and-usage.md</li></ul> <a class="edit" href="https://github.com/kubernetes-sigs/node-feature-discovery/edit/gh-pages/get-started/deployment-and-usage.md" title="Edit on GitHub" rel="noreferrer" target="_blank"> <i class="fa fa-edit"></i> </a> </div> <hr> <div role="main" itemscope="itemscope" itemtype="http://schema.org/Article"> <div class="markdown-body" itemprop="articleBody"> <h1 class="no_toc" id="deployment-and-usage">Deployment and Usage</h1> <h2 class="no_toc text-delta" id="table-of-contents">Table of Contents</h2> <ol id="markdown-toc"> <li><a href="#requirements" id="markdown-toc-requirements">Requirements</a></li> <li><a href="#deployment-options" id="markdown-toc-deployment-options">Deployment options</a> <ol> <li><a href="#operator" id="markdown-toc-operator">Operator</a></li> <li><a href="#deployment-templates" id="markdown-toc-deployment-templates">Deployment Templates</a></li> <li><a href="#build-your-own" id="markdown-toc-build-your-own">Build Your Own</a></li> </ol> </li> <li><a href="#usage" id="markdown-toc-usage">Usage</a> <ol> <li><a href="#nfd-master" id="markdown-toc-nfd-master">NFD-Master</a></li> <li><a href="#nfd-worker" id="markdown-toc-nfd-worker">NFD-Worker</a></li> <li><a href="#tls-authentication" id="markdown-toc-tls-authentication">TLS authentication</a></li> </ol> </li> <li><a href="#configuration" id="markdown-toc-configuration">Configuration</a></li> <li><a href="#using-node-labels" id="markdown-toc-using-node-labels">Using Node Labels</a></li> <li><a href="#uninstallation" id="markdown-toc-uninstallation">Uninstallation</a> <ol> <li><a href="#operator-was-used-for-deployment" id="markdown-toc-operator-was-used-for-deployment">Operator Was Used for Deployment</a></li> <li><a href="#manual" id="markdown-toc-manual">Manual</a></li> <li><a href="#removing-feature-labels" id="markdown-toc-removing-feature-labels">Removing Feature Labels</a></li> </ol> </li> </ol> <hr /> <h2 id="requirements">Requirements</h2> <ol> <li>Linux (x86_64/Arm64/Arm)</li> <li><a href="https://kubernetes.io/docs/tasks/tools/install-kubectl">kubectl</a> (properly set up and configured to work with your Kubernetes cluster)</li> </ol> <h2 id="deployment-options">Deployment options</h2> <h3 id="operator">Operator</h3> <p>Deployment using the <a href="https://github.com/kubernetes-sigs/node-feature-discovery-operator">Node Feature Discovery Operator</a> is recommended to be done via <a href="https://operatorhub.io/operator/nfd-operator">operatorhub.io</a>.</p> <ol> <li>You need to have <a href="https://github.com/operator-framework/operator-lifecycle-manager">OLM</a> installed. If you don't, take a look at the <a href="https://github.com/operator-framework/operator-lifecycle-manager/releases/latest">latest release</a> for detailed instructions.</li> <li>Install the operator: <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl create <span class="nt">-f</span> https://operatorhub.io/install/nfd-operator.yaml
</code></pre> </div> </div> </li> <li>Create NodeFeatureDiscovery resource (in <code class="language-plaintext highlighter-rouge notranslate">nfd</code> namespace here): <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nb">cat</span> <span class="o">&lt;&lt;</span> <span class="no">EOF</span><span class="sh"> | kubectl apply -f -
apiVersion: v1
kind: Namespace
metadata:
name: nfd
---
apiVersion: nfd.kubernetes.io/v1alpha1
kind: NodeFeatureDiscovery
metadata:
name: my-nfd-deployment
namespace: nfd
</span><span class="no">EOF
</span></code></pre> </div> </div> </li> </ol> <h3 id="deployment-templates">Deployment Templates</h3> <p>The template specs provided in the repo can be used directly:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl apply <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-master.yaml.template
kubectl apply <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-worker-daemonset.yaml.template
</code></pre> </div></div> <p>This will required RBAC rules and deploy nfd-master (as a deployment) and nfd-worker (as a daemonset) in the <code class="language-plaintext highlighter-rouge notranslate">node-feature-discovery</code> namespace.</p> <p>Alternatively you can download the templates and customize the deployment manually.</p> <h4 id="master-worker-pod">Master-Worker Pod</h4> <p>You can also run nfd-master and nfd-worker inside the same pod</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl apply <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-daemonset-combined.yaml.template
</code></pre> </div></div> <p>This creates a DaemonSet runs both nfd-worker and nfd-master in the same Pod. In this case no nfd-master is run on the master node(s), but, the worker nodes are able to label themselves which may be desirable e.g. in single-node setups.</p> <h4 id="worker-one-shot">Worker One-shot</h4> <p>Feature discovery can alternatively be configured as a one-shot job. The Job template may be used to achieve this:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nv">NUM_NODES</span><span class="o">=</span><span class="si">$(</span>kubectl get no <span class="nt">-o</span> <span class="nv">jsonpath</span><span class="o">=</span><span class="s1">'{.items[*].metadata.name}'</span> | <span class="nb">wc</span> <span class="nt">-w</span><span class="si">)</span>
curl <span class="nt">-fs</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-worker-job.yaml.template | <span class="se">\</span>
<span class="nb">sed </span>s<span class="s2">"/NUM_NODES/</span><span class="nv">$NUM_NODES</span><span class="s2">/"</span> | <span class="se">\</span>
kubectl apply <span class="nt">-f</span> -
</code></pre> </div></div> <p>The example above launces as many jobs as there are non-master nodes. Note that this approach does not guarantee running once on every node. For example, tainted, non-ready nodes or some other reasons in Job scheduling may cause some node(s) will run extra job instance(s) to satisfy the request.</p> <h3 id="build-your-own">Build Your Own</h3> <p>If you want to use the latest development version (master branch) you need to build your own custom image. See the <a href="../advanced/developer-guide">Developer Guide</a> for instructions how to build images and deploy them on your cluster.</p> <h2 id="usage">Usage</h2> <h3 id="nfd-master">NFD-Master</h3> <p>NFD-Master runs as a deployment (with a replica count of 1), by default it prefers running on the cluster's master nodes but will run on worker nodes if no master nodes are found.</p> <p>For High Availability, you should simply increase the replica count of the deployment object. You should also look into adding <a href="https://kubernetes.io/docs/concepts/configuration/assign-pod-node/#affinity-and-anti-affinity">inter-pod</a> affinity to prevent masters from running on the same node. However note that inter-pod affinity is costly and is not recommended in bigger clusters.</p> <p>NFD-Master listens for connections from nfd-worker(s) and connects to the Kubernetes API server to add node labels advertised by them.</p> <p>If you have RBAC authorization enabled (as is the default e.g. with clusters initialized with kubeadm) you need to configure the appropriate ClusterRoles, ClusterRoleBindings and a ServiceAccount in order for NFD to create node labels. The provided template will configure these for you.</p> <h3 id="nfd-worker">NFD-Worker</h3> <p>NFD-Worker is preferably run as a Kubernetes DaemonSet. This assures re-labeling on regular intervals capturing changes in the system configuration and mames sure that new nodes are labeled as they are added to the cluster. Worker connects to the nfd-master service to advertise hardware features.</p> <p>When run as a daemonset, nodes are re-labeled at an interval specified using the <code class="language-plaintext highlighter-rouge notranslate">--sleep-interval</code> option. In the <a href="https://github.com/kubernetes-sigs/node-feature-discovery/blob/master/nfd-worker-daemonset.yaml.template#L26">template</a> the default interval is set to 60s which is also the default when no <code class="language-plaintext highlighter-rouge notranslate">--sleep-interval</code> is specified. Also, the configuration file is re-read on each iteration providing a simple mechanism of run-time reconfiguration.</p> <h3 id="tls-authentication">TLS authentication</h3> <p>NFD supports mutual TLS authentication between the nfd-master and nfd-worker instances. That is, nfd-worker and nfd-master both verify that the other end presents a valid certificate.</p> <p>TLS authentication is enabled by specifying <code class="language-plaintext highlighter-rouge notranslate">--ca-file</code>, <code class="language-plaintext highlighter-rouge notranslate">--key-file</code> and <code class="language-plaintext highlighter-rouge notranslate">--cert-file</code> args, on both the nfd-master and nfd-worker instances. The template specs provided with NFD contain (commented out) example configuration for enabling TLS authentication.</p> <p>The Common Name (CN) of the nfd-master certificate must match the DNS name of the nfd-master Service of the cluster. By default, nfd-master only check that the nfd-worker has been signed by the specified root certificate (ca-file). Additional hardening can be enabled by specifying verify-node-name in nfd-master args, in which case nfd-master verifies that the NodeName presented by nfd-worker matches the Common Name (CN) of its certificate. This means that each nfd-worker requires a individual node-specific TLS certificate.</p> <h2 id="configuration">Configuration</h2> <p>NFD-Worker supports a configuration file. The default location is <code class="language-plaintext highlighter-rouge notranslate">/etc/kubernetes/node-feature-discovery/nfd-worker.conf</code>, but, this can be changed by specifying the<code class="language-plaintext highlighter-rouge notranslate">--config</code> command line flag. Configuration file is re-read on each labeling pass (determined by <code class="language-plaintext highlighter-rouge notranslate">--sleep-interval</code>) which makes run-time re-configuration of nfd-worker possible.</p> <p>Worker configuration file is read inside the container, and thus, Volumes and VolumeMounts are needed to make your configuration available for NFD. The preferred method is to use a ConfigMap which provides easy deployment and re-configurability.</p> <p>The provided nfd-worker deployment templates create an empty configmap and mount it inside the nfd-worker containers. Configuration can be edited with:</p> <div class="language-plaintext highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl -n ${NFD_NS} edit configmap nfd-worker-conf
</code></pre> </div></div> <p>The (empty-by-default) <a href="https://github.com/kubernetes-sigs/node-feature-discovery/blob/master/nfd-worker.conf.example">example config</a> contains all available configuration options and can be used as a reference for creating creating a configuration.</p> <p>Configuration options can also be specified via the <code class="language-plaintext highlighter-rouge notranslate">--options</code> command line flag, in which case no mounts need to be used. The same format as in the config file must be used, i.e. JSON (or YAML). For example:</p> <div class="language-plaintext highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>--options='{"sources": { "pci": { "deviceClassWhitelist": ["12"] } } }'
</code></pre> </div></div> <p>Configuration options specified from the command line will override those read from the config file.</p> <h2 id="using-node-labels">Using Node Labels</h2> <p>Nodes with specific features can be targeted using the <code class="language-plaintext highlighter-rouge notranslate">nodeSelector</code> field. The following example shows how to target nodes with Intel TurboBoost enabled.</p> <div class="language-yaml highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="na">apiVersion</span><span class="pi">:</span> <span class="s">v1</span>
<span class="na">kind</span><span class="pi">:</span> <span class="s">Pod</span>
<span class="na">metadata</span><span class="pi">:</span>
<span class="na">labels</span><span class="pi">:</span>
<span class="na">env</span><span class="pi">:</span> <span class="s">test</span>
<span class="na">name</span><span class="pi">:</span> <span class="s">golang-test</span>
<span class="na">spec</span><span class="pi">:</span>
<span class="na">containers</span><span class="pi">:</span>
<span class="pi">-</span> <span class="na">image</span><span class="pi">:</span> <span class="s">golang</span>
<span class="na">name</span><span class="pi">:</span> <span class="s">go1</span>
<span class="na">nodeSelector</span><span class="pi">:</span>
<span class="s">feature.node.kubernetes.io/cpu-pstate.turbo</span><span class="pi">:</span> <span class="s1">'</span><span class="s">true'</span>
</code></pre> </div></div> <p>For more details on targeting nodes, see <a href="https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/">node selection</a>.</p> <h2 id="uninstallation">Uninstallation</h2> <h3 id="operator-was-used-for-deployment">Operator Was Used for Deployment</h3> <p>If you followed the deployment instructions above you can simply do:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl <span class="nt">-n</span> nfd delete NodeFeatureDiscovery my-nfd-deployment
</code></pre> </div></div> <p>Optionally, you can also remove the namespace:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl delete ns nfd
</code></pre> </div></div> <p>See the <a href="https://github.com/kubernetes-sigs/node-feature-discovery-operator">node-feature-discovery-operator</a> and <a href="https://github.com/operator-framework/operator-lifecycle-manager">OLM</a> project documentation for instructions for uninstalling the operator and operator lifecycle manager, respectively.</p> <h3 id="manual">Manual</h3> <p>Simplest way is to invoke <code class="language-plaintext highlighter-rouge notranslate">kubectl delete</code> on the deployment files you used. Beware that this will also delete the namespace that NFD is running in. For example:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl delete <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-worker-daemonset.yaml.template
kubectl delete <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-master.yaml.template
</code></pre> </div></div> <p>Alternatively you can delete create objects one-by-one, depending on the type of deployment, for example:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nv">NFD_NS</span><span class="o">=</span>node-feature-discovery
kubectl <span class="nt">-n</span> <span class="nv">$NFD_NS</span> delete ds nfd-worker
kubectl <span class="nt">-n</span> <span class="nv">$NFD_NS</span> delete deploy nfd-master
kubectl <span class="nt">-n</span> <span class="nv">$NFD_NS</span> delete svc nfd-master
kubectl <span class="nt">-n</span> <span class="nv">$NFD_NS</span> delete sa nfd-master
kubectl delete clusterrole nfd-master
kubectl delete clusterrolebinding nfd-master
</code></pre> </div></div> <h3 id="removing-feature-labels">Removing Feature Labels</h3> <p>NFD-Master has a special <code class="language-plaintext highlighter-rouge notranslate">--prune</code> command line flag for removing all nfd-related node labels, annotations and extended resources from the cluster.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl apply <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-prune.yaml.template
kubectl <span class="nt">-n</span> node-feature-discovery <span class="nb">wait </span>job.batch/nfd-prune <span class="nt">--for</span><span class="o">=</span><span class="nv">condition</span><span class="o">=</span><span class="nb">complete</span> <span class="o">&amp;&amp;</span> <span class="se">\</span>
kubectl delete <span class="nt">-f</span> kubectl apply <span class="nt">-f</span> https://raw.githubusercontent.com/kubernetes-sigs/node-feature-discovery/master/nfd-prune.yaml.template
</code></pre> </div></div> <p><strong>NOTE:</strong> You must run prune before removing the RBAC rules (serviceaccount, clusterrole and clusterrolebinding).</p> <!-- Links --> </div> </div> <div class="navigation-bottom d-flex flex-justify-between py-3" role="navigation" aria-label="footer navigation"> <div class="prev"><a href="/node-feature-discovery/master/get-started/quick-start.html" class="btn" title="Quick Start" accesskey="p" rel="prev"> <i class="fa fa-arrow-circle-left"></i> Previous </a></div> <div class="next"><a href="/node-feature-discovery/master/get-started/features.html" class="btn" title="Feature Discovery" accesskey="n" rel="next"> Next <i class="fa fa-arrow-circle-right"></i> </a></div> </div><hr> <div class="copyright text-center text-gray" role="contentinfo"> <i class="fa fa-copyright"></i> <span class="time">2016-2021,</span> <a class="text-gray" href="https://github.com/kubernetes-sigs" rel="noreferrer" target="_blank">Kubernetes SIGs</a> Revision <a class="text-gray" href="https://github.com/kubernetes-sigs/node-feature-discovery/commit/" title="" rel="noreferrer" target="_blank"></a> <br> <div class="generator"> Built with <a href="https://jekyllrb.com" rel="noreferrer" target="_blank">Jekyll</a> using a <a href="https://github.com/rundocs/jekyll-rtd-theme" rel="noreferrer" target="_blank" title="remote theme: jekyll-rtd-theme v2.0.9">theme</a> provided by <a href="https://rundocs.io" rel="noreferrer" target="_blank">RunDocs</a>. </div> </div> </div> </div> <div class="addons-wrap d-flex flex-column overflow-y-auto"> <div class="status d-flex flex-justify-between p-2"> <div class="title p-1"> <i class="fa fa-book"></i> Node Feature Discovery </div> <div class="branch p-1"> <span class="name"> master </span> <i class="fa fa-caret-down"></i> </div> </div> <div class="addons d-flex flex-column height-full p-2 d-none"> <dl id="versions"> <dt>Versions</dt> <script src="/node-feature-discovery/versions.js"></script> <script> var dt = document.getElementById('versions'); var items = getVersionListItems(); for (var i=0; i < items.length; i++) { var dd = document.createElement('dd'); var a = dd.appendChild(document.createElement('a')); a.appendChild(document.createTextNode(items[i].name)); a.href = items[i].url; dt.appendChild(dd); } </script> </dl> <dl> <dt>GitHub</dt> <dd> <a href="https://github.com/kubernetes-sigs/node-feature-discovery" title="Stars: 257"> <i class="fa fa-github"></i> Homepage </a> </dd> <dd> <a href="https://github.com/kubernetes-sigs/node-feature-discovery/issues" title="Open issues: 17"> <i class="fa fa-question-circle-o"></i> Issues </a> </dd> <dd> <a href="https://github.com/kubernetes-sigs/node-feature-discovery/zipball/gh-pages" title="Size: 78744 Kb"> <i class="fa fa-download"></i> Download </a> </dd> </dl> <hr> <div class="license f6 pb-2"> The <a href="/node-feature-discovery/master/">software</a> is under the terms of <a href="https://github.com/kubernetes-sigs/node-feature-discovery">Apache License 2.0</a>. </div> </div> </div> <script> window.ui = { title: "Node Feature Discovery", baseurl: "/node-feature-discovery/master", i18n: { search_results: "Search Results", search_results_found: "Search finished, found # page(s) matching the search query.", search_results_not_found: "Your search did not match any documents, please make sure that all characters are spelled correctly!" } }; </script> <script src="https://cdn.jsdelivr.net/gh/rundocs/jekyll-rtd-theme@2.0.9/assets/js/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/gh/rundocs/jekyll-rtd-theme@2.0.9/assets/js/theme.min.js"></script> </body> </html>