5.2. Persistent storage using local volumes

Procedure

1. Create the openshift-local-storage project:

   $ oc adm new-project openshift-local-storage

2. Optional: Allow local storage creation on infrastructure nodes.

   You might want to use the Local Storage Operator to create volumes on infrastructure nodes in support of components such as logging and monitoring.

   You must adjust the default node selector so that the Local Storage Operator includes the infrastructure nodes, and not just worker nodes.

   To block the Local Storage Operator from inheriting the cluster-wide default selector, enter the following command:

   $ oc annotate namespace openshift-local-storage openshift.io/node-selector=''

3. Optional: Allow local storage to run on the management pool of CPUs in single-node deployment.

   Use the Local Storage Operator in single-node deployments and allow the use of CPUs that belong to the management pool. Perform this step on single-node installations that use management workload partitioning.

   To allow Local Storage Operator to run on the management CPU pool, run following commands:

   $ oc annotate namespace openshift-local-storage workload.openshift.io/allowed='management'

1. Log in to the OpenShift Container Platform web console.
2. Navigate to Ecosystem Software Catalog.
3. Type Local Storage into the filter box to locate the Local Storage Operator.
4. Click Install.
5. On the Install Operator page, select A specific namespace on the cluster. Select openshift-local-storage from the drop-down menu.
6. Adjust the values for Update Channel and Approval Strategy to the values that you want.
7. Click Install.

From the CLI

1. Install the Local Storage Operator from the CLI.

   1. Create an object YAML file to define an Operator group and subscription for the Local Storage Operator, such as openshift-local-storage.yaml:

      Example openshift-local-storage.yaml

      apiVersion: operators.coreos.com/v1
      kind: OperatorGroup
      metadata:
        name: local-operator-group
        namespace: openshift-local-storage
      spec:
        targetNamespaces:
          - openshift-local-storage
      ---
      apiVersion: operators.coreos.com/v1alpha1
      kind: Subscription
      metadata:
        name: local-storage-operator
        namespace: openshift-local-storage
      spec:
        channel: stable
        installPlanApproval: Automatic 

      1

      
        name: local-storage-operator
        source: redhat-operators
        sourceNamespace: openshift-marketplace

      1

      The user approval policy for an install plan.

2. Create the Local Storage Operator object by entering the following command:

   $ oc apply -f openshift-local-storage.yaml

   At this point, the Operator Lifecycle Manager (OLM) is now aware of the Local Storage Operator. A ClusterServiceVersion (CSV) for the Operator should appear in the target namespace, and APIs provided by the Operator should be available for creation.

3. Verify local storage installation by checking that all pods and the Local Storage Operator have been created:

   1. Check that all the required pods have been created:

      $ oc -n openshift-local-storage get pods

      Example output

      NAME                                      READY   STATUS    RESTARTS   AGE
      local-storage-operator-746bf599c9-vlt5t   1/1     Running   0          19m

   2. Check the ClusterServiceVersion (CSV) YAML manifest to see that the Local Storage Operator is available in the openshift-local-storage project:

      $ oc get csvs -n openshift-local-storage

      Example output

      NAME                                         DISPLAY         VERSION               REPLACES   PHASE
      local-storage-operator.4.2.26-202003230335   Local Storage   4.2.26-202003230335              Succeeded