Create a Manual Backup of a Healthy etcd Cluster

Manually create a backup of a healthy etcd cluster and check to see if the backup was created successfully.

Backups of healthy etcd clusters can be used to restore the cluster if it becomes unhealthy at any point.

The commands in this procedure can be run on any master node (ncn-mXXX) or worker node (ncn-wXXX) on the system.

Prerequisites

A healthy etcd cluster is available on the system. See Check the Health and Balance of etcd Clusters.

Procedure

  1. Create a backup for the desired etcd cluster.

    The example below is backing up the etcd cluster for the Boot Orchestration Service (BOS). The returned backup name (cray-bos-etcd-cluster-manual-backup-25847) will be used in the next step.

    ncn-w001# kubectl exec -it -n operators \
            $(kubectl get pod -n operators | grep etcd-backup-restore | head -1 | awk '{print $1}') \
            -c util -- create_backup cray-bos wednesday-manual-backup

    Example output:

    etcdbackup.etcd.database.coreos.com/cray-bos-etcd-cluster-manual-backup-25847 created

  2. Check the status of the backup using the name returned in the output of the previous step.

    ncn-w001# kubectl -n services get etcdbackup BACKUP_NAME -o yaml

    Example output:

      status:
    etcdRevision: 1
    etcdVersion: 3.3.8
    lastSuccessDate: "2020-01-13T21:38:47Z"
    succeeded: true