Mirantis Container Cloud (MCC) becomes part of Mirantis OpenStack for Kubernetes (MOSK)!

Starting with MOSK 25.2, the MOSK documentation set will cover all product layers, including MOSK management (formerly MCC). This means everything you need will be in one place. The separate MCC documentation site will be retired, so please update your bookmarks for continued easy access to the latest content.

Verify the periodic backup jobs for the OpenStack database

1. Verify pods in the openstack namespace. After the backup jobs have succeeded, the pods stay in the Completed state:

   kubectl -n openstack get pods -l application=mariadb-phy-backup
   

   Example of a posistive system response:

   NAME                                  READY   STATUS      RESTARTS   AGE
   mariadb-phy-backup-1599613200-n7jqv   0/1     Completed   0          43h
   mariadb-phy-backup-1599699600-d79nc   0/1     Completed   0          30h
   mariadb-phy-backup-1599786000-d5kc7   0/1     Completed   0          6h17m
   

   Note

   By default, the system keeps three latest successful and one latest failed pods.

2. Obtain an image of the MariaDB container:

   kubectl -n openstack get pods mariadb-server-0 -o jsonpath='{.spec.containers[0].image}'
   

3. Create the check_pod.yaml file to create the helper pod required to view the backup volume content.

   Configuration example:

   apiVersion: v1
   kind: ServiceAccount
   metadata:
     name: check-backup-helper
     namespace: openstack
   ---
   apiVersion: v1
   kind: Pod
   metadata:
     name: check-backup-helper
     namespace: openstack
     labels:
       application: check-backup-helper
   spec:
     nodeSelector:
       openstack-control-plane: enabled
     containers:
       - name: helper
         securityContext:
           allowPrivilegeEscalation: false
           runAsUser: 0
           readOnlyRootFilesystem: true
         command:
           - sleep
           - infinity
         image: << image of mariadb container >>
         imagePullPolicy: IfNotPresent
         volumeMounts:
           - name: pod-tmp
             mountPath: /tmp
           - mountPath: /var/backup
             name: mysql-backup
     restartPolicy: Never
     serviceAccount: check-backup-helper
     serviceAccountName: check-backup-helper
     volumes:
       - name: pod-tmp
         emptyDir: {}
       - name: mariadb-secrets
         secret:
           secretName: mariadb-secrets
           defaultMode: 0444
       - name: mariadb-bin
         configMap:
           name: mariadb-bin
           defaultMode: 0555
       - name: mysql-backup
         persistentVolumeClaim:
           claimName: mariadb-phy-backup-data
   

4. Apply the helper service account and pod resources:

   kubectl -n openstack apply -f check_pod.yaml
   kubectl -n openstack get pods -l application=check-backup-helper
   

   Example of a positive system response:

   NAME                  READY   STATUS    RESTARTS   AGE
   check-backup-helper   1/1     Running   0          27s
   

5. Verify the directories structure within the /var/backup directory of the spawned pod:

   kubectl -n openstack exec -t check-backup-helper -- tree /var/backup
   

   Example of a system response:

   /var/backup
   |-- base
   |   `-- 2020-09-09_11-35-48
   |       |-- backup.stream.gz
   |       |-- backup.successful
   |       |-- grastate.dat
   |       |-- xtrabackup_checkpoints
   |       `-- xtrabackup_info
   |-- incr
   |   `-- 2020-09-09_11-35-48
   |       |-- 2020-09-10_01-02-36
   |       |   |-- backup.stream.gz
   |       |   |-- backup.successful
   |       |   |-- grastate.dat
   |       |   |-- xtrabackup_checkpoints
   |       |   `-- xtrabackup_info
   |       `-- 2020-09-11_01-02-02
   |           |-- backup.stream.gz
   |           |-- backup.successful
   |           |-- grastate.dat
   |           |-- xtrabackup_checkpoints
   |           `-- xtrabackup_info
   

   The base directory contains full backups. Each directory in the incr folder contains incremental backups related to a certain full backup in the base folder. All incremental backups always have the base backup name as parent folder.

6. Delete the helper pod:

   kubectl delete -f check_pod.yaml