Resuming a node from maintenance mode - Node maintenance | Virtualization

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- Authorization APIs
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  - LocalResourceAccessReview [authorization.openshift.io/v1]
  - LocalSubjectAccessReview [authorization.openshift.io/v1]
  - ResourceAccessReview [authorization.openshift.io/v1]
  - SelfSubjectRulesReview [authorization.openshift.io/v1]
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  - Operator [operators.coreos.com/v1]
  - OperatorCondition [operators.coreos.com/v2]
  - OperatorGroup [operators.coreos.com/v1]
  - PackageManifest [packages.operators.coreos.com/v1]
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- RBAC APIs
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  - ClusterRoleBinding [rbac.authorization.k8s.io/v1]
  - ClusterRole [rbac.authorization.k8s.io/v1]
  - RoleBinding [rbac.authorization.k8s.io/v1]
  - Role [rbac.authorization.k8s.io/v1]
- Role APIs
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  - ClusterRoleBinding [authorization.openshift.io/v1]
  - ClusterRole [authorization.openshift.io/v1]
  - RoleBindingRestriction [authorization.openshift.io/v1]
  - RoleBinding [authorization.openshift.io/v1]
  - Role [authorization.openshift.io/v1]
- Schedule and quota APIs
  - About Schedule and quota APIs
  - AppliedClusterResourceQuota [quota.openshift.io/v1]
  - ClusterResourceQuota [quota.openshift.io/v1]
  - FlowSchema [flowcontrol.apiserver.k8s.io/v1beta1]
  - LimitRange [core/v1]
  - PriorityClass [scheduling.k8s.io/v1]
  - PriorityLevelConfiguration [flowcontrol.apiserver.k8s.io/v1beta1]
  - ResourceQuota [core/v1]
- Security APIs
  - About Security APIs
  - CertificateSigningRequest [certificates.k8s.io/v1]
  - CredentialsRequest [cloudcredential.openshift.io/v1]
  - PodSecurityPolicyReview [security.openshift.io/v1]
  - PodSecurityPolicySelfSubjectReview [security.openshift.io/v1]
  - PodSecurityPolicySubjectReview [security.openshift.io/v1]
  - RangeAllocation [security.openshift.io/v1]
  - Secret [core/v1]
  - SecurityContextConstraints [security.openshift.io/v1]
  - ServiceAccount [core/v1]
- Storage APIs
  - About Storage APIs
  - CSIDriver [storage.k8s.io/v1]
  - CSINode [storage.k8s.io/v1]
  - CSIStorageCapacity [storage.k8s.io/v1beta1]
  - PersistentVolumeClaim [core/v1]
  - StorageClass [storage.k8s.io/v1]
  - StorageState [migration.k8s.io/v1alpha1]
  - StorageVersionMigration [migration.k8s.io/v1alpha1]
  - VolumeAttachment [storage.k8s.io/v1]
  - VolumeSnapshot [snapshot.storage.k8s.io/v1]
  - VolumeSnapshotClass [snapshot.storage.k8s.io/v1]
  - VolumeSnapshotContent [snapshot.storage.k8s.io/v1]
- Template APIs
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  - BrokerTemplateInstance [template.openshift.io/v1]
  - PodTemplate [core/v1]
  - Template [template.openshift.io/v1]
  - TemplateInstance [template.openshift.io/v1]
- User and group APIs
  - About User and group APIs
  - Group [user.openshift.io/v1]
  - Identity [user.openshift.io/v1]
  - UserIdentityMapping [user.openshift.io/v1]
  - User [user.openshift.io/v1]
- Workloads APIs
  - About Workloads APIs
  - BuildConfig [build.openshift.io/v1]
  - Build [build.openshift.io/v1]
  - CronJob [batch/v1]
  - DaemonSet [apps/v1]
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  - DeploymentConfig [apps.openshift.io/v1]
  - Job [batch/v1]
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Virtualization
- About OKD Virtualization
- Start here with OKD Virtualization
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- Additional security privileges granted for kubevirt-controller and virt-launcher
- Using the CLI tools
- Virtual machines
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- Live migration
- Node maintenance
- Node networking
- Logging, events, and monitoring

Resuming a node from maintenance mode in the web console
Resuming a node from maintenance mode in the CLI
Resuming a node from maintenance mode that was initiated with a NodeMaintenance CR

Resuming a node brings it out of maintenance mode and makes it schedulable again.

Resume a node from maintenance mode from the web console, CLI, or by deleting the NodeMaintenance custom resource.

Resuming a node from maintenance mode in the web console

Resume a node from maintenance mode using the Options menu kebab found on each node in the Compute → Nodes list, or using the Actions control of the Node Details screen.

Procedure

In the OKD Virtualization console, click Compute → Nodes.
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.
Click Stop Maintenance in the confirmation window.

The node becomes schedulable, but virtual machine instances that were running on the node prior to maintenance will not automatically migrate back to this node.

Resuming a node from maintenance mode in the CLI

Resume a node from maintenance mode by making it schedulable again.

Procedure

Mark the node as schedulable. You can then resume scheduling new workloads on the node.
```
$ oc adm uncordon <node1>
```

Resuming a node from maintenance mode that was initiated with a NodeMaintenance CR

You can resume a node by deleting the NodeMaintenance CR.

Prerequisites

Install the OKD CLI oc.
Log in to the cluster as a user with cluster-admin privileges.

Procedure

When your node maintenance task is complete, delete the active NodeMaintenance CR:

$ oc delete -f nodemaintenance-cr.yaml

Example output

nodemaintenance.nodemaintenance.kubevirt.io "maintenance-example" deleted