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<!DOCTYPE html> <html lang="en" dir="auto"> <head><meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=5, user-scalable=no"> <meta name="description" content="NFD-Worker NFD-Worker is preferably run as a Kubernetes DaemonSet. This assures re-labeling on regular intervals capturing changes in the system co..."> <meta name="revised" content=""> <meta name="author" content="Kubernetes SIGs"> <meta name="generator" content="jekyll-rtd-theme v2.0.10"><meta name="theme-color" content="#2980b9"> <title>NFD-Worker · Node Feature Discovery</title> <meta name="twitter:title" content="NFD-Worker · Node Feature Discovery"> <meta name="twitter:description" content="NFD-Worker NFD-Worker is preferably run as a Kubernetes DaemonSet. 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This assures re-labeling on regular intervals capturing changes in the system co..." } </script> <link rel="dns-prefetch" href="https://cdn.jsdelivr.net"><link rel="prev" href="https://kubernetes-sigs.github.com/node-feature-discovery/v0.16/usage/nfd-master.html"><link rel="next" href="https://kubernetes-sigs.github.com/node-feature-discovery/v0.16/usage/nfd-topology-updater.html"><link rel="canonical" href="https://kubernetes-sigs.github.com/node-feature-discovery/v0.16/usage/nfd-worker.html"><link rel="icon" type="image/svg+xml" href="/node-feature-discovery/v0.16/assets/images/favicon.svg"><link rel="icon" type="image/png" href="/node-feature-discovery/v0.16/assets/images/favicon-16x16.png" sizes="16x16"> <link rel="icon" type="image/png" href="/node-feature-discovery/v0.16/assets/images/favicon-32x32.png" sizes="32x32"> <link rel="icon" type="image/png" href="/node-feature-discovery/v0.16/assets/images/favicon-96x96.png" sizes="96x96"><link rel="mask-icon" href="/node-feature-discovery/v0.16/assets/images/favicon.svg" color="#2980b9"><link rel="apple-touch-icon" href="/node-feature-discovery/v0.16/assets/images/apple-touch-icon-300x300.jpg"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/rundocs/jekyll-rtd-theme@2.0.10/assets/css/theme.min.css"><style>@media (min-width: 1280px){.content-wrap{max-width:1200px}}</style><script> window.ui = { title: "Node Feature Discovery", baseurl: "/node-feature-discovery/v0.16", 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> </head> <body class="container"><div class="sidebar-wrap overflow-hidden"> <div class="sidebar height-full overflow-y-scroll overflow-x-hidden"> <div class="header d-flex flex-column p-3 text-center"> <div class="title pb-1"> <a class="h4 no-underline py-1 px-2 rounded-1" href="/node-feature-discovery/v0.16/" title="Documentation of Node Feature Discovery - 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">v0.16.6</span> <form class="search pt-2" action="/node-feature-discovery/v0.16/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/v0.16/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/v0.16/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/v0.16/get-started/quick-start.html">2. Quick start</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.16/deployment/"> Deployment </a><ul> <li class="toc level-1 " data-sort="1" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/image-variants.html">1. Image variants</a> </li> <li class="toc level-1 " data-sort="2" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/kustomize.html">2. Kustomize</a> </li> <li class="toc level-1 " data-sort="3" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/helm.html">3. Helm</a> </li> <li class="toc level-1 " data-sort="4" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/operator.html">4. NFD Operator</a> </li> <li class="toc level-1 " data-sort="5" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/tls.html">5. TLS authentication</a> </li> <li class="toc level-1 " data-sort="6" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/uninstallation.html">6. Uninstallation</a> </li> <li class="toc level-1 " data-sort="7" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/deployment/metrics.html">7. Metrics</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.16/usage/"> Usage </a><ul> <li class="toc level-1 " data-sort="1" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/features.html">1. Feature labels</a> </li> <li class="toc level-1 " data-sort="2" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/using-labels.html">2. Using node labels</a> </li> <li class="toc level-1 " data-sort="3" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/nfd-master.html">3. NFD-Master</a> </li> <li class="toc level-1 current" data-sort="4" data-level="1"> <a class="d-flex flex-items-baseline current" href="/node-feature-discovery/v0.16/usage/nfd-worker.html">4. NFD-Worker</a> </li> <li class="toc level-1 " data-sort="5" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/nfd-topology-updater.html">5. NFD-Topology-Updater</a> </li> <li class="toc level-1 " data-sort="6" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/nfd-gc.html">6. NFD-Garbage-Collector</a> </li> <li class="toc level-1 " data-sort="7" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/custom-resources.html">7. CRDs</a> </li> <li class="toc level-1 " data-sort="8" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/customization-guide.html">8. Customization guide</a> </li> <li class="toc level-1 " data-sort="9" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/examples-and-demos.html">9. Examples and demos</a> </li> <li class="toc level-1 " data-sort="10" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/usage/kubectl-plugin.html">10. Kubectl plugin</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.16/reference/"> Reference </a><ul> <li class="toc level-1 " data-sort="1" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/master-commandline-reference.html">1. Master cmdline reference</a> </li> <li class="toc level-1 " data-sort="2" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/worker-commandline-reference.html">2. Worker 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/v0.16/reference/master-configuration-reference.html">3. Master config reference</a> </li> <li class="toc level-1 " data-sort="4" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/worker-configuration-reference.html">4. Worker config reference</a> </li> <li class="toc level-1 " data-sort="5" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/topology-updater-commandline-reference.html">5. Topology Updater Cmdline Reference</a> </li> <li class="toc level-1 " data-sort="6" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/topology-updater-configuration-reference.html">6. Topology-Updater config reference</a> </li> <li class="toc level-1 " data-sort="7" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/gc-commandline-reference.html">7. Garbage Collector Cmdline Reference</a> </li> <li class="toc level-1 " data-sort="8" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/plugin-commandline-reference.html">8. Kubectl plugin cmdline reference</a> </li> <li class="toc level-1 " data-sort="9" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/versions.html">9. Versions</a> </li> <li class="toc level-1 " data-sort="10" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.16/reference/feature-gates.html">10. Feature Gates</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.16/developer-guide/"> Developer guide </a><ul> </ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.16/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" aria-label="Toggle menu" 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/v0.16/">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/v0.16/" title="/"> <i class="fa fa-home"></i> </a> </li><li class="breadcrumb-item" ><a href="/node-feature-discovery/v0.16/usage/">usage</a></li><li class="breadcrumb-item" aria-current="page">nfd-worker.md</li></ul> <a class="edit" href="https://github.com/kubernetes-sigs/node-feature-discovery/edit/gh-pages/usage/nfd-worker.md" title="Edit on GitHub" rel="noreferrer" target="_blank"> <i class="fa fa-edit"></i> </a> </div> <hr> <div role="main" itemscope="itemscope" itemtype="https://schema.org/Article"> <div class="markdown-body" itemprop="articleBody"> <h1 class="no_toc" id="nfd-worker">NFD-Worker</h1> <hr /> <p>NFD-Worker is preferably run as a Kubernetes DaemonSet. This assures re-labeling on regular intervals capturing changes in the system configuration and makes 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 default interval of 60s. This can be changed by using the <a href="/node-feature-discovery/v0.16/reference/worker-configuration-reference.html#coresleepinterval"><code class="language-plaintext highlighter-rouge notranslate">core.sleepInterval</code></a> config option.</p> <p>The worker configuration file is watched and re-read on every change which provides a mechanism of dynamic run-time reconfiguration. See <a href="#worker-configuration">worker configuration</a> for more details.</p> <h2 id="worker-configuration">Worker configuration</h2> <p>NFD-Worker supports dynamic configuration through 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 whenever it is modified which makes run-time re-configuration of nfd-worker straightforward.</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. In kustomize deployments, configuration can be edited with:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl <span class="nt">-n</span> <span class="k">${</span><span class="nv">NFD_NS</span><span class="k">}</span> edit configmap nfd-worker-conf
</code></pre> </div></div> <p>In Helm deployments, <a href="/node-feature-discovery/v0.16/deployment/helm.html#worker-pod-parameters">Worker pod parameter</a> <code class="language-plaintext highlighter-rouge notranslate">worker.config</code> can be used to edit the respective configuration.</p> <p>See <a href="../reference/worker-configuration-reference">nfd-worker configuration file reference</a> for more details. The (empty-by-default) <a href="https://github.com/kubernetes-sigs/node-feature-discovery/blob/v0.16.6/deployment/components/worker-config/nfd-worker.conf.example">example config</a> contains all available configuration options and can be used as a reference for 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-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nt">-options</span><span class="o">=</span><span class="s1">'{"sources": { "pci": { "deviceClassWhitelist": ["12"] } } }'</span>
</code></pre> </div></div> <p>Configuration options specified from the command line will override those read from the config file.</p> </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/v0.16/usage/nfd-master.html" class="btn" title="NFD-Master" accesskey="p" rel="prev"> <i class="fa fa-arrow-circle-left"></i> Previous </a></div> <div class="next"><a href="/node-feature-discovery/v0.16/usage/nfd-topology-updater.html" class="btn" title="NFD-Topology-Updater" 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">2016-2024,</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://pages.github.com" rel="noreferrer" target="_blank" title="github-pages v228">GitHub Pages</a> using a <a href="https://github.com/rundocs/jekyll-rtd-theme" rel="noreferrer" target="_blank" title="jekyll-rtd-theme v2.0.10">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"> v0.16 </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: 805"> <i class="fa fa-github"></i> Homepage </a> </dd> <dd> <a href="https://github.com/kubernetes-sigs/node-feature-discovery/issues" title="Open issues: 48"> <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: 107463 Kb"> <i class="fa fa-download"></i> Download </a> </dd> </dl> <hr> <div class="license f6 pb-2"> This <a href="/node-feature-discovery/v0.16/" title="Node Feature Discovery">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 src="https://cdn.jsdelivr.net/gh/rundocs/jekyll-rtd-theme@2.0.10/assets/js/jquery.min.js"></script><script src="https://cdn.jsdelivr.net/gh/rundocs/jekyll-rtd-theme@2.0.10/assets/js/theme.min.js"></script> </body> </html>
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