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<p><a href="elma365-on-premises.html">BRIX On-Premises</a> > <a href="elma365-enterprise.html">BRIX On-Premises Enterprise</a> > Install add-on components for BRIX / Install Linkerd</p>
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<div class="topic__title"><h1 class="p_Heading1"><span class="f_Heading1">Install Linkerd</span></h1>
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<!-- Placeholder for topic body. -->
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<p class="p_Normal">Linkerd is a dedicated infrastructure layer that facilitates service-to-service communication, automatically encrypts connections, handles retries and timeouts. Installing the Linkerd add-on component ensures balancing of gRPC traffic when scaling BRIX services. It also provides telemetry (success rates, latencies), and much more.</p>
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<p class="p_Normal">Linkerd is a necessary component for enabling support of service scaling on the side of the BRIX application. Without Linkerd installed, scaling of BRIX microservices will not work.</p>
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<p class="p_Normal">To learn about installing Linkerd using Cert-manager, see <a href="linkerd-with-cert-manager.html" class="topiclink">Install Linkerd using Cert-manager</a>.</p>
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<p class="p_Normal">This article covers how to:</p>
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<ul style="list-style-type:disc">
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<li class="p_Normal">Prepare certificates using openssl for Linkerd and install it.</li><li class="p_Normal"><a href="install-linkerd.html#delete_chart" class="topiclink">Delete the Linkerd chart using Helm in the Kubernetes cluster</a>.</li></ul>
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<p class="p_Normal">The installation consists of four steps:</p>
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<ol style="list-style-type:decimal">
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<li value="1" class="p_Normal"><a href="install-linkerd.html#preparation-of-certificates" class="topiclink">Prepare certificates for Linkerd</a>.</li><li value="2" class="p_Normal"><a href="install-linkerd.html#download-helm-chart-and-config-file" class="topiclink">Download the Helm chart and configuration file</a>.</li><li value="3" class="p_Normal"><a href="install-linkerd.html#fill-config-file" class="topiclink">Fill out the configuration file</a>.</li><li value="4" class="p_Normal"><a href="install-linkerd.html#install-linkerd-chart" class="topiclink">Install the Linkerd chart using helm in the Kubernetes cluster</a>.</li></ol>
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<h2 class="p_Heading2"><a id="preparation-of-certificates" class="hmanchor"></a><span class="f_Heading2">Step 1: Prepare certificates for Linkerd</span></h2>
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<p class="p_Normal">Generate certificates using OpenSSL with the commands below. Linkerd requires a trust anchor certificate and issuer certificates with the corresponding key to support mutual TLS connections between services. All certificates must use the <span style="font-weight: bold;">ECDSA P-256</span> algorithm.</p>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample"># Create CA private key</span><br />
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<span class="f_CodeExample">openssl ecparam -name prime256v1 -genkey -noout -out ca-private.pem</span><br />
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<span class="f_CodeExample"># Create CA public key</span><br />
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<span class="f_CodeExample">openssl ec -in ca-private.pem -pubout -out ca-public.pem</span><br />
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<span class="f_CodeExample"># Create self-signed CA certificate</span><br />
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<span class="f_CodeExample">openssl req -x509 -new -key ca-private.pem -days 3650 -out ca.crt -subj "/CN=root.linkerd.cluster.local"</span><br />
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<span class="f_CodeExample"># Create issuer private key</span><br />
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<span class="f_CodeExample">openssl ecparam -name prime256v1 -genkey -noout -out issuer-private.pem</span><br />
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<span class="f_CodeExample"># Create issuer public key</span><br />
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<span class="f_CodeExample">openssl ec -in issuer-private.pem -pubout -out issuer-public.pem</span><br />
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<span class="f_CodeExample"># Create certificate signing request</span><br />
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<span class="f_CodeExample">openssl req -new -key issuer-private.pem -out issuer.csr -subj "/CN=identity.linkerd.cluster.local" -addext basicConstraints=critical,CA:TRUE</span><br />
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<span class="f_CodeExample"># Create issuer certificate by signing the request</span><br />
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<span class="f_CodeExample">openssl x509 \</span><br />
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<span class="f_CodeExample">-extfile /etc/ssl/openssl.cnf \</span><br />
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<span class="f_CodeExample">-extensions v3_ca \</span><br />
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<span class="f_CodeExample">-req \</span><br />
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<span class="f_CodeExample">-in issuer.csr \</span><br />
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<span class="f_CodeExample">-days 3650 \</span><br />
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<span class="f_CodeExample">-CA ca.crt \</span><br />
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<span class="f_CodeExample">-CAkey ca-private.pem \</span><br />
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<span class="f_CodeExample">-CAcreateserial \</span><br />
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<span class="f_CodeExample">-extensions v3_ca \</span><br />
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<span class="f_CodeExample">-out issuer.crt</span><br />
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<span class="f_CodeExample"># Remove certificate signing request</span><br />
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<span class="f_CodeExample">rm issuer.csr</span></p>
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<h2 class="p_Heading2"><a id="download-helm-chart-and-config-file" class="hmanchor"></a><span class="f_Heading2">Step 2: Download the Helm chart and configuration file</span></h2>
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<p class="p_Normal">To install via the internet, obtain the <code><b>values-linkerd.yaml</b></code> configuration file by executing the command:</p>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">helm repo add elma365 https</span><span class="f_CodeExample">://charts.elma365.tech</span><br />
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<span class="f_CodeExample">helm repo update</span><br />
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<span class="f_CodeExample">helm show values elma365/linkerd > values-linkerd.yaml</span></p>
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<p class="p_Normal"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A1')">Obtaining the configuration file for a closed-loop installation with no internet access</a></p>
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<div id="TOGGLE0186A1" class="dropdown-toggle-body" style="text-align: left; text-indent: 0; line-height: 1.80; padding: 0 0 0 0; margin: 0 0 0 0;"><table style="border:none; border-spacing:0;">
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<tr>
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<td style="vertical-align:top; padding:0; border:none"><ol style="list-style-type:decimal">
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<li value="1" class="p_Normal">On a computer with internet access, download the BRIX images and upload them to your local image registry by executing the following command:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">helm repo add elma365 </span><span class="f_CodeExample">https://charts.elma365.tech</span><br />
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<span class="f_CodeExample">helm repo update</span><br />
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<span class="f_CodeExample">helm pull elma365/linkerd</span></p>
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<p class="p_Normal">For more details, see <a href="downloadin-images-elma365.html" class="topiclink">Download BRIX images</a>.</p>
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<ol style="list-style-type:decimal" start="2">
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<li value="2" class="p_Normal">Copy the downloaded <code><b>linkerd-X.Y.Z.tgz</b></code> chart archive to the server where the installation will be performed.</li><li value="3" class="p_Normal">Unpack this chart and copy the default configuration file <code><b>values.yaml</b></code> to <code><b>values-linkerd.yaml</b></code>:</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">tar -xf linkerd-X.Y.Z.tgz</span><br />
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<span class="f_CodeExample">cp linkerd/values.yaml values-linkerd.yaml</span></p>
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</td>
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</tr>
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</table>
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</div>
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<h2 class="p_Heading2"><a id="fill-config-file" class="hmanchor"></a><span class="f_Heading2">Step 3: Fill out the configuration file</span></h2>
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<p class="p_Normal">Fill out the <code><b>values-linkerd.yaml</b></code> configuration file for installing Linkerd:</p>
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<ol style="list-style-type:upper-roman">
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<li value="1" class="p_Normal">Specify the DNS domain name of the Kubernetes cluster in the <code><b>linkerd.clusterDomain</b></code> parameter, in this case, <code><b>cluster.local</b></code>.</li></ol>
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<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample"># Linkerd settings</span><br />
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<span class="f_CodeExample">linkerd:</span><br />
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<span class="f_CodeExample"> # DNS domain name of Kubernetes</span><br />
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<span class="f_CodeExample"> clusterDomain: cluster.local</span><br />
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<span class="f_CodeExample"> # dds PodSecurityPolicy resource (deprecated starting with k8s v1.21)</span><br />
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<span class="f_CodeExample"> enablePSP: </span><span class="f_CodeExample" style="font-weight: bold;">false</span><br />
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<span class="f_CodeExample"> # disable heartbeat</span><br />
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<span class="f_CodeExample"> disableHeartBeat: </span><span class="f_CodeExample" style="font-weight: bold;">false</span><span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample">...</span></p>
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<ol style="list-style-type:upper-roman" start="2">
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<li value="2" class="p_Normal">To ensure high availability, you may uncomment the parameters in the <span style="font-weight: bold;">Parameters for high availability</span> section.</li></ol>
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<p class="p_Normal"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A2')">Example of enabling high availability</a></p>
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<div id="TOGGLE0186A2" class="dropdown-toggle-body" style="text-align: left; text-indent: 0; line-height: 1.80; padding: 0 0 0 0; margin: 0 0 0 0;"><table style="border:none; border-spacing:0;">
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<tr>
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<td style="vertical-align:top; padding:0; border:none"><p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample"> </span><br />
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<span class="f_CodeExample"># Linkerd settings</span><br />
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<span class="f_CodeExample">linkerd:</span><br />
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<span class="f_CodeExample">...</span><br />
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<span class="f_CodeExample">#</span><br />
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<span class="f_CodeExample"># Perameters for high availability</span><br />
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<span class="f_CodeExample"> controllerReplicas: 3</span><br />
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<span class="f_CodeExample"> enablePodDisruptionBudget: </span><span class="f_CodeExample" style="font-weight: bold;">true</span><br />
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<span class="f_CodeExample"> deploymentStrategy:</span><br />
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<span class="f_CodeExample"> rollingUpdate:</span><br />
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<span class="f_CodeExample"> maxUnavailable: 1</span><br />
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<span class="f_CodeExample"> maxSurge: 25%</span><br />
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<span class="f_CodeExample"> enablePodAntiAffinity: </span><span class="f_CodeExample" style="font-weight: bold;">true</span><br />
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<span class="f_CodeExample"> proxy:</span><br />
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<span class="f_CodeExample"> resources:</span><br />
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<span class="f_CodeExample"> cpu:</span><br />
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<span class="f_CodeExample"> request: 100m</span><br />
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<span class="f_CodeExample"> memory:</span><br />
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<span class="f_CodeExample"> limit: 250Mi</span><br />
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<span class="f_CodeExample"> request: 20Mi</span><br />
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<span class="f_CodeExample"> controllerResources: &controller_resources</span><br />
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<span class="f_CodeExample"> cpu: &controller_resources_cpu</span><br />
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<span class="f_CodeExample"> limit: ""</span><br />
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<span class="f_CodeExample"> request: 100m</span><br />
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<span class="f_CodeExample"> memory:</span><br />
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<span class="f_CodeExample"> limit: 250Mi</span><br />
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<span class="f_CodeExample"> request: 50Mi</span><br />
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<span class="f_CodeExample"> destinationResources: *controller_resources</span><br />
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<span class="f_CodeExample"> identityResources:</span><br />
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<span class="f_CodeExample"> cpu: *controller_resources_cpu</span><br />
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<span class="f_CodeExample"> memory:</span><br />
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<span class="f_CodeExample"> limit: 250Mi</span><br />
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<span class="f_CodeExample"> request: 10Mi</span><br />
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<span class="f_CodeExample"> heartbeatResources: *controller_resources</span><br />
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<span class="f_CodeExample"> proxyInjectorResources: *controller_resources</span><br />
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<span class="f_CodeExample"> webhookFailurePolicy: Fail</span><br />
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<span class="f_CodeExample"> spValidatorResources: *controller_resources</span><br />
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<span class="f_CodeExample"># </span><br />
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<span class="f_CodeExample">...</span></p>
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</td>
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</tr>
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</table>
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</div>
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<ol style="list-style-type:upper-roman" start="3">
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<li value="3" class="p_Normal">If you have installed <a href="install-monitoring-tools.html" class="topiclink">monitoring tools</a>, specify the parameter for Linkerd metrics:</li></ol>
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<p class="p_CodeExample" style="white-space: normal; page-break-inside: avoid;"><span class="f_CodeExample"># Connection parameter for metrics collection</span><br />
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<span class="f_CodeExample">podMonitor:</span><br />
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<span class="f_CodeExample"> enabled: true</span></p>
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<ol style="list-style-type:upper-roman" start="4">
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<li value="4" class="p_Normal">If you install Linkerd in a isolated environment without internet access, fill out the connection parameters for the private <span style="font-weight: bold;">registry</span>.</li></ol>
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<p class="p_Normal"><a class="dropdown-toggle" style="font-style: normal; font-weight: normal; color: #000000; background-color: transparent; text-decoration: none;" href="javascript:HMToggle('toggle','TOGGLE0186A3')">How to fill out connection parameters for the private registry</a></p>
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<div id="TOGGLE0186A3" class="dropdown-toggle-body" style="text-align: left; text-indent: 0; line-height: 1.80; padding: 0 0 0 0; margin: 0 0 0 0;"><table style="border:none; border-spacing:0;">
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<tr>
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<td style="vertical-align:top; padding:0; border:none"><ol style="list-style-type:decimal">
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<li value="1" class="p_Normal">Download the BRIX images and upload them to the local image registry. For more details, see <a href="downloadin-images-elma365.html" class="topiclink">Download BRIX images</a>.</li></ol>
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<ol style="list-style-type:decimal" start="2">
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<li value="2" class="p_Normal">Specify address and path in parameters <code><b>linkerd.controllerImage</b></code>, <code><b>linkerd.policyController.image.name</b></code>, <code><b>linkerd.proxy.image.name</b></code>, <code><b>linkerd.proxyInit.image.name</b></code>.</li></ol>
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<ol style="list-style-type:decimal" start="3">
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<li value="3" class="p_Normal">Specify the name of the secret with access rights to the private registry in the parameter <code><b>linkerd.imagePullSecrets</b></code>. The secret must be manually created and encrypted in Base64.</li></ol>
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<p class="p_CodeExample" style="white-space: normal; page-break-inside: avoid;"><span class="f_CodeExample"># linkerd settings</span><br />
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<span class="f_CodeExample">linkerd:</span><br />
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<span class="f_CodeExample">...</span><br />
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<span class="f_CodeExample"> # connection parameters to the private registry</span><br />
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<span class="f_CodeExample"> # address and path for the private registry</span><br />
|
||
<span class="f_CodeExample"> controllerImage: registry.example.com/linkerd/controller</span><br />
|
||
<span class="f_CodeExample"> policyController:</span><br />
|
||
<span class="f_CodeExample"> image:</span><br />
|
||
<span class="f_CodeExample"> # address and path for the private registry</span><br />
|
||
<span class="f_CodeExample"> name: registry.example.com/linkerd/policy-controller</span><br />
|
||
<span class="f_CodeExample"> proxy:</span><br />
|
||
<span class="f_CodeExample"> image:</span><br />
|
||
<span class="f_CodeExample"> # address and path for the private registry</span><br />
|
||
<span class="f_CodeExample"> name: registry.example.com/linkerd/proxy</span><br />
|
||
<span class="f_CodeExample"> proxyInit:</span><br />
|
||
<span class="f_CodeExample"> image:</span><br />
|
||
<span class="f_CodeExample"> # address and path for the private registry</span><br />
|
||
<span class="f_CodeExample"> name: registry.example.com/linkerd/proxy-init</span><br />
|
||
<span class="f_CodeExample"> # secret with access rights to the private registry must be created manually, encrypted in Base64</span><br />
|
||
<span class="f_CodeExample"> imagePullSecrets:</span><br />
|
||
<span class="f_CodeExample"> - name: myRegistryKeySecretName</span></p>
|
||
<p class="p_Normal">Where the format is as follows:</p>
|
||
<ul style="list-style-type:disc">
|
||
<li class="p_Normal"><code><b>linkerd.controllerImage</b></code>:<ul style="list-style-type:circle">
|
||
<li class="p_Normal">Address is <code><b>registry.example.com</b></code>.</li><li class="p_Normal">Path is <code><b>/linkerd/controller</b></code>.</li></ul>
|
||
<li class="p_Normal"><code><b>linkerd.policyController.image.name</b></code>:<ul style="list-style-type:circle">
|
||
<li class="p_Normal">Address is <code><b>registry.example.com</b></code>.</li><li class="p_Normal">Path is <code><b>/linkerd/policy-controller</b></code>.</li></ul>
|
||
<li class="p_Normal"><code><b>linkerd.proxy.image.name</b></code>:<ul style="list-style-type:circle">
|
||
<li class="p_Normal">Address is <code><b>registry.example.com</b></code>.</li><li class="p_Normal">Path is <code><b>/linkerd/proxy</b></code>.</li></ul>
|
||
<li class="p_Normal"><code><b>linkerd.proxyInit.image.name</b></code>:<ul style="list-style-type:circle">
|
||
<li class="p_Normal">Address is <code><b>registry.example.com</b></code>.</li><li class="p_Normal">Path is <code><b>/linkerd/proxy-init</b></code>.</li></ul></li></ul>
|
||
</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
<h2 class="p_Heading2"><a id="install-linkerd-chart" class="hmanchor"></a><span class="f_Heading2">Step 4: Install the Linkerd chart using helm in the Kubernetes cluster</span></h2>
|
||
<p class="p_Normal">Perform the installation of the Linkerd chart in <code><b>namespace linkerd</b></code>. The namespace will be created during installation if it was not previously created.</p>
|
||
<p class="p_Normal">Within the article, the installation command is executed from the directory where the certificates were created in Step 1. If the command is being executed from a different directory, specify the paths to the certificates created in Step 1 (<code><b>ca.crt</b></code>, <code><b>issuer.crt</b></code>, <code><b>issuer-private.pem</b></code>). </p>
|
||
<p class="p_Normal">For online installation:</p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">helm upgrade --install linkerd elma365/linkerd -f values-linkerd.yaml -n linkerd --create-namespace \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identityTrustAnchorsPEM=ca.crt \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identity.issuer.tls.crtPEM=issuer.crt \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identity.issuer.tls.keyPEM=issuer-private.pem</span></p>
|
||
<p class="p_Normal">For offline installation:</p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">helm upgrade --install linkerd ./linkerd -f values-linkerd.yaml -n linkerd --create-namespace \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identityTrustAnchorsPEM=ca.crt \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identity.issuer.tls.crtPEM=issuer.crt \</span><br />
|
||
<span class="f_CodeExample">--set-file linkerd.identity.issuer.tls.keyPEM=issuer-private.pem</span></p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">Начало внимание</span></p>
|
||
<p class="p_Normal">After installing Linkerd, change the BRIX application settings and set up autoscaling of services. Read more in the <a href="autoscaling-service-enterprise.html" class="topiclink">Enable service autoscaling in BRIX Enterprise</a> article.</p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">Конец внимание</span></p>
|
||
<h2 class="p_Heading2"><a id="delete_chart" class="hmanchor"></a><span class="f_Heading2">Delete Linkerd chart using helm in a Kubernetes cluster</span></h2>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">Начало внимание</span></p>
|
||
<p class="p_Normal">Before removing the Linkerd add-on component, disable auto-scaling on the side of the BRIX application.</p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">Конец внимание</span></p>
|
||
<p class="p_Normal">To delete the Linkerd chart in <code><b>namespace linkerd</b></code>, run the following command:</p>
|
||
<p class="p_CodeExample" style="page-break-inside: avoid;"><span class="f_CodeExample">helm uninstall linkerd -n linkerd</span></p>
|
||
|
||
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