Chapter 2. Using Self Node Remediation

Procedure

1. In the Red Hat OpenShift web console, navigate to Operators OperatorHub.
2. Select the Self Node Remediation Operator from the list of available Operators, and then click Install.
3. Keep the default selection of Installation mode and namespace to ensure that the Operator is installed to the openshift-workload-availability namespace.
4. Click Install.

1. Navigate to the Operators Installed Operators page.
2. Check that the Operator is installed in the openshift-workload-availability namespace and its status is Succeeded.

1. Navigate to the Operators Installed Operators page and inspect the Status column for any errors or failures.
2. Navigate to the Workloads Pods page and check the logs of the self-node-remediation-controller-manager pod and self-node-remediation-ds pods in the openshift-workload-availability project for any reported issues.

Procedure

1. Create a Namespace custom resource (CR) for the Self Node Remediation Operator:

   1. Define the Namespace CR and save the YAML file, for example, workload-availability-namespace.yaml:

      apiVersion: v1
      kind: Namespace
      metadata:
        name: openshift-workload-availability

   2. To create the Namespace CR, run the following command:

      $ oc create -f workload-availability-namespace.yaml

2. Create an OperatorGroup CR:

   1. Define the OperatorGroup CR and save the YAML file, for example, workload-availability-operator-group.yaml:

      apiVersion: operators.coreos.com/v1
      kind: OperatorGroup
      metadata:
        name: workload-availability-operator-group
        namespace: openshift-workload-availability

   2. To create the OperatorGroup CR, run the following command:

      $ oc create -f workload-availability-operator-group.yaml

3. Create a Subscription CR:

   1. Define the Subscription CR and save the YAML file, for example, self-node-remediation-subscription.yaml:

      apiVersion: operators.coreos.com/v1alpha1
      kind: Subscription
      metadata:
          name: self-node-remediation-operator
          namespace: openshift-workload-availability 1
      spec:
          channel: stable
          installPlanApproval: Manual 2
          name: self-node-remediation-operator
          source: redhat-operators
          sourceNamespace: openshift-marketplace
          package: self-node-remediation

      1

      Specify the Namespace where you want to install the Self Node Remediation Operator. To install the Self Node Remediation Operator in the openshift-workload-availability namespace, specify openshift-workload-availability in the Subscription CR.

      2

      Set the approval strategy to Manual in case your specified version is superseded by a later version in the catalog. This plan prevents an automatic upgrade to a later version and requires manual approval before the starting CSV can complete the installation.

   2. To create the Subscription CR, run the following command:

      $ oc create -f self-node-remediation-subscription.yaml

4. Verify that the Self Node Remediation Operator created the SelfNodeRemediationTemplate CR:

   $ oc get selfnoderemediationtemplate -n openshift-workload-availability

   Example output

   self-node-remediation-automatic-strategy-template

Verification

1. Verify that the installation succeeded by inspecting the CSV resource:

   $ oc get csv -n openshift-workload-availability

   Example output

   NAME                               DISPLAY                          VERSION   REPLACES   PHASE
   self-node-remediation.v0.8.0       Self Node Remediation Operator   v.0.8.0   self-node-remediation.v0.7.1           Succeeded

2. Verify that the Self Node Remediation Operator is up and running:

   $ oc get deployment -n openshift-workload-availability

   Example output

   NAME                                        READY   UP-TO-DATE   AVAILABLE   AGE
   self-node-remediation-controller-manager    1/1     1            1           28h

3. Verify that the Self Node Remediation Operator created the SelfNodeRemediationConfig CR:

   $ oc get selfnoderemediationconfig -n openshift-workload-availability

   Example output

   NAME                           AGE
   self-node-remediation-config   28h

4. Verify that each self node remediation pod is scheduled and running on each worker node and control plane node:

   $ oc get daemonset -n openshift-workload-availability

   Example output

   NAME                      DESIRED  CURRENT  READY  UP-TO-DATE  AVAILABLE  NODE SELECTOR  AGE
   self-node-remediation-ds  6        6        6      6           6          <none>         28h