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</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/v0.14/" 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">v0.14.1</span> <form class="search pt-2" action="/node-feature-discovery/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/deployment/operator.html">4. NFD Operator</a> </li> <li class="toc level-1 current" data-sort="5" data-level="1"> <a class="d-flex flex-items-baseline current" href="/node-feature-discovery/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/usage/nfd-master.html">3. NFD-Master</a> </li> <li class="toc level-1 " data-sort="4" data-level="1"> <a class="d-flex flex-items-baseline " href="/node-feature-discovery/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/usage/examples-and-demos.html">9. Examples and demos</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/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/v0.14/reference/versions.html">8. Versions</a> </li></ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.14/developer-guide/"> Developer guide </a><ul> </ul> <a class="caption d-block text-uppercase no-wrap px-2 py-0" href="/node-feature-discovery/v0.14/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/v0.14/">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/v0.14/" title="/"> <i class="fa fa-home"></i> </a> </li><li class="breadcrumb-item" ><a href="/node-feature-discovery/v0.14/deployment/">deployment</a></li><li class="breadcrumb-item" aria-current="page">tls.md</li></ul> <a class="edit" href="https://github.com/kubernetes-sigs/node-feature-discovery/edit/gh-pages/deployment/tls.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="communication-security-with-tls">Communication security with TLS</h1> <h2 class="no_toc text-delta" id="table-of-contents">Table of contents</h2> <ol id="markdown-toc"> <li><a href="#automated-tls-certificate-management-using-cert-manager" id="markdown-toc-automated-tls-certificate-management-using-cert-manager">Automated TLS certificate management using cert-manager</a></li> <li><a href="#manual-tls-certificate-management" id="markdown-toc-manual-tls-certificate-management">Manual TLS certificate management</a></li> </ol> <hr /> <blockquote> <p><strong>DEPRECATED</strong>: this section only applies when the gRPC API is used, i.e. when the NodeFeature API is disabled via the <code class="language-plaintext highlighter-rouge notranslate">-enable-nodefeature-api=false</code> flag on both nfd-master and nfd-worker. The gRPC API is deprecated and will be removed in a future release.</p> </blockquote> <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).</p> <p>Additional hardening can be enabled by specifying <code class="language-plaintext highlighter-rouge notranslate">-verify-node-name</code> in nfd-master args, in which case nfd-master verifies that the NodeName presented by nfd-worker matches the Common Name (CN) or a Subject Alternative Name (SAN) of its certificate. Note that <code class="language-plaintext highlighter-rouge notranslate">-verify-node-name</code> complicates certificate management and is not yet supported in the helm or kustomize deployment methods.</p> <h2 id="automated-tls-certificate-management-using-cert-manager">Automated TLS certificate management using cert-manager</h2> <p><a href="https://cert-manager.io/">cert-manager</a> can be used to automate certificate management between nfd-master and the nfd-worker pods.</p> <p>The NFD source code repository contains an example kustomize overlay and helm chart that can be used to deploy NFD with cert-manager supplied certificates enabled.</p> <p>To install <code class="language-plaintext highlighter-rouge notranslate">cert-manager</code> itself can be done as easily as this, below, or you can refer to their documentation for other installation methods such as the helm chart they provide.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl apply <span class="nt">-f</span> https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml
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</code></pre> </div></div> <p>To use the kustomize overlay to install node-feature-discovery with TLS enabled, you may use the following:</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>kubectl apply <span class="nt">-k</span> deployment/overlays/samples/cert-manager
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</code></pre> </div></div> <p>To make use of the helm chart, override <code class="language-plaintext highlighter-rouge notranslate">values.yaml</code> to enable both the <code class="language-plaintext highlighter-rouge notranslate">tls.enabled</code> and <code class="language-plaintext highlighter-rouge notranslate">tls.certManager</code> options. Note that if you do not enable <code class="language-plaintext highlighter-rouge notranslate">tls.certManager</code>, helm will successfully install the application, but deployment will wait until certificates are manually created, as demonstrated below.</p> <p>See the sample installation commands in the Helm <a href="/node-feature-discovery/v0.14/deployment/helm.html#deployment">Deployment</a> and <a href="/node-feature-discovery/v0.14/deployment/helm.html#configuration">Configuration</a> sections above for how to either override individual values, or provide a yaml file with which to override default values.</p> <h2 id="manual-tls-certificate-management">Manual TLS certificate management</h2> <p>If you do not with to make use of cert-manager, the certificates can be manually created and stored as secrets within the NFD namespace.</p> <p>Create a CA certificate</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code>openssl req <span class="nt">-x509</span> <span class="nt">-newkey</span> rsa:4096 <span class="nt">-keyout</span> ca.key <span class="nt">-nodes</span> <span class="se">\</span>
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<span class="nt">-subj</span> <span class="s2">"/CN=nfd-ca"</span> <span class="nt">-days</span> 10000 <span class="nt">-out</span> ca.crt
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</code></pre> </div></div> <p>Create a common openssl config file.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nb">cat</span> <span class="o"><<</span><span class="no">EOF</span><span class="sh"> > nfd-common.conf
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[ req ]
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default_bits = 4096
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prompt = no
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default_md = sha256
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req_extensions = req_ext
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distinguished_name = dn
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[ dn ]
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C = XX
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ST = some-state
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L = some-city
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O = some-company
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OU = node-feature-discovery
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[ req_ext ]
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subjectAltName = @alt_names
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[ v3_ext ]
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authorityKeyIdentifier=keyid,issuer:always
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basicConstraints=CA:FALSE
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keyUsage=keyEncipherment,dataEncipherment
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extendedKeyUsage=serverAuth,clientAuth
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subjectAltName=@alt_names
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</span><span class="no">EOF
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</span></code></pre> </div></div> <p>Now, create the nfd-master certificate.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nb">cat</span> <span class="o"><<</span><span class="no">EOF</span><span class="sh"> > nfd-master.conf
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.include nfd-common.conf
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[ dn ]
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CN = nfd-master
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[ alt_names ]
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DNS.1 = nfd-master
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DNS.2 = nfd-master.node-feature-discovery.svc.cluster.local
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DNS.3 = localhost
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</span><span class="no">EOF
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</span>openssl req <span class="nt">-new</span> <span class="nt">-newkey</span> rsa:4096 <span class="nt">-keyout</span> nfd-master.key <span class="nt">-nodes</span> <span class="nt">-out</span> nfd-master.csr <span class="nt">-config</span> nfd-master.conf
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</code></pre> </div></div> <p>Create certificates for nfd-worker and nfd-topology-updater</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="nb">cat</span> <span class="o"><<</span><span class="no">EOF</span><span class="sh"> > nfd-worker.conf
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.include nfd-common.conf
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[ dn ]
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CN = nfd-worker
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[ alt_names ]
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DNS.1 = nfd-worker
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DNS.2 = nfd-worker.node-feature-discovery.svc.cluster.local
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</span><span class="no">EOF
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</span><span class="c"># Config for topology updater is identical except for the DN and alt_names</span>
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<span class="nb">sed</span> <span class="nt">-e</span> <span class="s1">'s/worker/topology-updater/g'</span> < nfd-worker.conf <span class="o">></span> nfd-topology-updater.conf
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openssl req <span class="nt">-new</span> <span class="nt">-newkey</span> rsa:4096 <span class="nt">-keyout</span> nfd-worker.key <span class="nt">-nodes</span> <span class="nt">-out</span> nfd-worker.csr <span class="nt">-config</span> nfd-worker.conf
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openssl req <span class="nt">-new</span> <span class="nt">-newkey</span> rsa:4096 <span class="nt">-keyout</span> nfd-topology-updater.key <span class="nt">-nodes</span> <span class="nt">-out</span> nfd-topology-updater.csr <span class="nt">-config</span> nfd-topology-updater.conf
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</code></pre> </div></div> <p>Now, sign the certificates with the CA created earlier.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="k">for </span>cert <span class="k">in </span>nfd-master nfd-worker nfd-topology-updater<span class="p">;</span> <span class="k">do
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</span><span class="nb">echo </span>signing <span class="nv">$cert</span>
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openssl x509 <span class="nt">-req</span> <span class="nt">-in</span> <span class="nv">$cert</span>.csr <span class="nt">-CA</span> ca.crt <span class="nt">-CAkey</span> ca.key <span class="se">\</span>
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<span class="nt">-CAcreateserial</span> <span class="nt">-out</span> <span class="nv">$cert</span>.crt <span class="nt">-days</span> 10000 <span class="se">\</span>
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<span class="nt">-extensions</span> v3_ext <span class="nt">-extfile</span> <span class="nv">$cert</span>.conf
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<span class="k">done</span>
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</code></pre> </div></div> <p>Finally, turn these certificates into secrets.</p> <div class="language-bash highlighter-rouge notranslate"><div class="highlight"><pre class="highlight"><code><span class="k">for </span>cert <span class="k">in </span>nfd-master nfd-worker nfd-topology-updater<span class="p">;</span> <span class="k">do
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</span><span class="nb">echo </span>creating secret <span class="k">for</span> <span class="nv">$cert</span> <span class="k">in </span>node-feature-discovery namespace
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<span class="nb">cat</span> <span class="o"><<</span><span class="no">EOF</span><span class="sh"> | kubectl create -n node-feature-discovery -f -
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---
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apiVersion: v1
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kind: Secret
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type: kubernetes.io/tls
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metadata:
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name: </span><span class="k">${</span><span class="nv">cert</span><span class="k">}</span><span class="sh">-cert
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data:
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ca.crt: </span><span class="si">$(</span> <span class="nb">cat </span>ca.crt | <span class="nb">base64</span> <span class="nt">-w</span> 0 <span class="si">)</span><span class="sh">
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tls.crt: </span><span class="si">$(</span> <span class="nb">cat</span> <span class="nv">$cert</span>.crt | <span class="nb">base64</span> <span class="nt">-w</span> 0 <span class="si">)</span><span class="sh">
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tls.key: </span><span class="si">$(</span> <span class="nb">cat</span> <span class="nv">$cert</span>.key | <span class="nb">base64</span> <span class="nt">-w</span> 0 <span class="si">)</span><span class="sh">
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</span><span class="no">EOF
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</span><span class="k">done</span>
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</code></pre> </div></div> </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/v0.14/deployment/operator.html" class="btn" title="NFD Operator" accesskey="p" rel="prev"> <i class="fa fa-arrow-circle-left"></i> Previous </a></div> <div class="next"><a href="/node-feature-discovery/v0.14/deployment/uninstallation.html" class="btn" title="Uninstallation" 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">2016-2023,</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="rundocs/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"> v0.14 </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: 600"> <i class="fa fa-github"></i> Homepage </a> </dd> <dd> <a href="https://github.com/kubernetes-sigs/node-feature-discovery/issues" title="Open issues: 16"> <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: 93731 Kb"> <i class="fa fa-download"></i> Download </a> </dd> </dl> <hr> <div class="license f6 pb-2"> This <a href="/node-feature-discovery/v0.14/" 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> |