Chapter 9. Node maintenance

Procedure

1. Download the rotate-certs.sh script from GitHub:

   $ curl -O https://raw.githubusercontent.com/kubevirt/hyperconverged-cluster-operator/master/tools/rotate-certs.sh

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2. Ensure the script is executable:

   $ chmod +x rotate-certs.sh

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3. Run the script:

   $ ./rotate-certs.sh -n openshift-cnv

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Procedure

1. In the container-native virtualization console, click Compute Nodes.

2. You can set the node to maintenance from this screen, which makes it easier to perform actions on multiple nodes in the one screen or from the Node Details screen where you can view comprehensive details of the selected node:

   • Click the Options menu at the end of the node and select Start Maintenance.
   • Click the node name to open the Node Details screen and click Actions Start Maintenance.
3. Click Start Maintenance in the confirmation window.

Procedure

1. Create the node maintenance CR configuration. This example uses a CR that is called node02-maintenance.yaml:

   apiVersion: kubevirt.io/v1alpha1
   kind: NodeMaintenance
   metadata:
     name: node02-maintenance
   spec:
     nodeName: node02
     reason: "Replacing node02"

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2. Create the NodeMaintenance object in the cluster:

   $ oc apply -f <node02-maintenance.yaml>

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Procedure

1. In the container-native virtualization console, click Compute Nodes.

2. You can resume the node from this screen, which makes it easier to perform actions on multiple nodes in the one screen, or from the Node Details screen where you can view comprehensive details of the selected node:

   • Click the Options menu at the end of the node and select Stop Maintenance.
   • Click the node name to open the Node Details screen and click Actions Stop Maintenance.
3. Click Stop Maintenance in the confirmation window.

Procedure

1. Find the NodeMaintenance object:

   $ oc get nodemaintenance

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2. Optional: Insepct the NodeMaintenance object to ensure it is associated with the correct node:

   $ oc describe nodemaintenance <node02-maintenance>

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   Name:         node02-maintenance
   Namespace:
   Labels:
   Annotations:
   API Version:  kubevirt.io/v1alpha1
   Kind:         NodeMaintenance
   ...
   Spec:
     Node Name:  node02
     Reason:     Replacing node02

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3. Delete the NodeMaintenance object:

   $ oc delete nodemaintenance <node02-maintenance>

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