Chapter 15. Manually importing a hosted cluster Hosted clusters are automatically imported into multicluster engine Operator after the hosted control plane becomes available. 15.1. Limitations of managing imported hosted clusters Hosted clusters are automatically imported into the local multicluster engine for Kubernetes Operator, unlike a standalone OpenShift Container Platform or third party clusters. Hosted clusters run some of their agents in the hosted mode so that the agents do not use the resources of your cluster. If you choose to automatically import hosted clusters, you can update node pools and the control plane in hosted clusters by using the HostedCluster resource on the management cluster. To update node pools and a control plane, see "Updating node pools in a hosted cluster" and "Updating a control plane in a hosted cluster". You can import hosted clusters into a location other than the local multicluster engine Operator by using the Red Hat Advanced Cluster Management (RHACM). For more information, see "Discovering multicluster engine for Kubernetes Operator hosted clusters in Red Hat Advanced Cluster Management". In this topology, you must update your hosted clusters by using the command-line interface or the console of the local multicluster engine for Kubernetes Operator where the cluster is hosted. You cannot update the hosted clusters through the RHACM hub cluster. 15.2. Additional resources Updating node pools in a hosted cluster Updating a control plane in a hosted cluster Discovering multicluster engine for Kubernetes Operator hosted clusters in Red Hat Advanced Cluster Management 15.3. Manually importing hosted clusters If you want to import hosted clusters manually, complete the following steps. Procedure In the console, click Infrastructure Clusters and select the hosted cluster that you want to import. Click Import hosted cluster . Note For your discovered hosted cluster, you can also import from the console, but the cluster must be in an upgradable state. Import on your cluster is disabled if the hosted cluster is not in an upgradable state because the hosted control plane is not available. Click Import to begin the process. The status is Importing while the cluster receives updates and then changes to Ready . 15.4. Manually importing a hosted cluster on AWS You can also import a hosted cluster on Amazon Web Services (AWS) with the command-line interface. Procedure Create your ManagedCluster resource by using the following sample YAML file: apiVersion: cluster.open-cluster-management.io/v1 kind: ManagedCluster metadata: annotations: import.open-cluster-management.io/hosting-cluster-name: local-cluster import.open-cluster-management.io/klusterlet-deploy-mode: Hosted open-cluster-management/created-via: hypershift labels: cloud: auto-detect cluster.open-cluster-management.io/clusterset: default name: <hosted_cluster_name> 1 vendor: OpenShift name: <hosted_cluster_name> spec: hubAcceptsClient: true leaseDurationSeconds: 60 1 Replace <hosted_cluster_name> with the name of your hosted cluster. Run the following command to apply the resource: USD oc apply -f <file_name> 1 1 Replace <file_name> with the YAML file name you created in the step. If you have Red Hat Advanced Cluster Management installed, create your KlusterletAddonConfig resource by using the following sample YAML file. If you have installed multicluster engine Operator only, skip this step: apiVersion: agent.open-cluster-management.io/v1 kind: KlusterletAddonConfig metadata: name: <hosted_cluster_name> 1 namespace: <hosted_cluster_namespace> 2 spec: clusterName: <hosted_cluster_name> clusterNamespace: <hosted_cluster_namespace> clusterLabels: cloud: auto-detect vendor: auto-detect applicationManager: enabled: true certPolicyController: enabled: true iamPolicyController: enabled: true policyController: enabled: true searchCollector: enabled: false 1 Replace <hosted_cluster_name> with the name of your hosted cluster. 2 Replace <hosted_cluster_namespace> with the name of your hosted cluster namespace. Run the following command to apply the resource: USD oc apply -f <file_name> 1 1 Replace <file_name> with the YAML file name you created in the step. After the import process is complete, your hosted cluster becomes visible in the console. You can also check the status of your hosted cluster by running the following command: USD oc get managedcluster <hosted_cluster_name> 15.5. Disabling the automatic import of hosted clusters into multicluster engine Operator Hosted clusters are automatically imported into multicluster engine Operator after the control plane becomes available. If needed, you can disable the automatic import of hosted clusters. Any hosted clusters that were previously imported are not affected, even if you disable automatic import. When you upgrade to multicluster engine Operator 2.5 and automatic import is enabled, all hosted clusters that are not imported are automatically imported if their control planes are available. Note If Red Hat Advanced Cluster Management is installed, all Red Hat Advanced Cluster Management add-ons are also enabled. When automatic import is disabled, only newly created hosted clusters are not automatically imported. Hosted clusters that were already imported are not affected. You can still manually import clusters by using the console or by creating the ManagedCluster and KlusterletAddonConfig custom resources. Procedure To disable the automatic import of hosted clusters, complete the following steps: On the hub cluster, open the hypershift-addon-deploy-config specification that is in the AddonDeploymentConfig resource in the namespace where multicluster engine Operator is installed by entering the following command: USD oc edit addondeploymentconfig hypershift-addon-deploy-config \ -n multicluster-engine In the spec.customizedVariables section, add the autoImportDisabled variable with value of "true" , as shown in the following example: apiVersion: addon.open-cluster-management.io/v1alpha1 kind: AddOnDeploymentConfig metadata: name: hypershift-addon-deploy-config namespace: multicluster-engine spec: customizedVariables: - name: hcMaxNumber value: "80" - name: hcThresholdNumber value: "60" - name: autoImportDisabled value: "true" To re-enable automatic import, set the value of the autoImportDisabled variable to "false" or remove the variable from the AddonDeploymentConfig resource.

Commands:
apiVersion: cluster.open-cluster-management.io/v1 kind: ManagedCluster metadata: annotations: import.open-cluster-management.io/hosting-cluster-name: local-cluster import.open-cluster-management.io/klusterlet-deploy-mode: Hosted open-cluster-management/created-via: hypershift labels: cloud: auto-detect cluster.open-cluster-management.io/clusterset: default name: <hosted_cluster_name> 1 vendor: OpenShift name: <hosted_cluster_name> spec: hubAcceptsClient: true leaseDurationSeconds: 60
oc apply -f <file_name> 1
apiVersion: agent.open-cluster-management.io/v1 kind: KlusterletAddonConfig metadata: name: <hosted_cluster_name> 1 namespace: <hosted_cluster_namespace> 2 spec: clusterName: <hosted_cluster_name> clusterNamespace: <hosted_cluster_namespace> clusterLabels: cloud: auto-detect vendor: auto-detect applicationManager: enabled: true certPolicyController: enabled: true iamPolicyController: enabled: true policyController: enabled: true searchCollector: enabled: false
oc apply -f <file_name> 1
oc get managedcluster <hosted_cluster_name>
oc edit addondeploymentconfig hypershift-addon-deploy-config -n multicluster-engine
apiVersion: addon.open-cluster-management.io/v1alpha1 kind: AddOnDeploymentConfig metadata: name: hypershift-addon-deploy-config namespace: multicluster-engine spec: customizedVariables: - name: hcMaxNumber value: "80" - name: hcThresholdNumber value: "60" - name: autoImportDisabled value: "true"