6 Uninstalling cnDBTier

This section provides the procedure to uninstall cnDBTier.

Note:

• The OCCNE_NAMESPACE variable in the uninstall procedure must be set to the cnDBTier namespace. Before running any command that contains the OCCNE_NAMESPACEvariable, ensure that you have set this variable to the cnDBTier namespace as stated in the following code block:

  export OCCNE_NAMESPACE=<namespace>

  where, <namespace> is the cnDBTier namespace.

• The namespace name "occne-cndbtier" given in this procedure is only an example. Ensure that you configure the namespace name according to your environment.

1. Run the following command to uninstall MySQL cluster:

   $ helm uninstall mysql-cluster -n ${OCCNE_NAMESPACE}

   Upon successful uninstallation, the following message is displayed:

   release "mysql-cluster" uninstalled

2. Run the following command to delete the secrets:

   $ kubectl -n ${OCCNE_NAMESPACE} delete secrets occne-mysqlndb-root-secret occne-replication-secret-db-replication-secret occne-secret-db-monitor-secret cndbtier-ssh-private-key cndbtier-ssh-public-key cndbtier-https-cert-file cndbtier-https-cert-cred cndbtier-mysql-encrypt-key occne-backup-encryption-secret occne-remoteserver-privatekey-secret occne-remote-server-username-secret cndbtier-client-secret cndbtier-server-secret cndbtier-trust-store-secret

   Upon successful deletion, the following messages are displayed:

   secret "occne-mysqlndb-root-secret" deleted
   secret "occne-replication-secret-db-replication-secret" deleted
   secret "occne-secret-db-monitor-secret" deleted
   secret "cndbtier-ssh-private-key" deleted
   secret "cndbtier-ssh-public-key" deleted
   secret "cndbtier-https-cert-file" deleted
   secret "cndbtier-https-cert-cred" deleted
   secret "cndbtier-mysql-encrypt-key" deleted
   secret "occne-backup-encryption-secret" deleted
   secret "occne-remoteserver-privatekey-secret" deleted
   secret "occne-remote-server-username-secret" deleted
   secret "cndbtier-client-secret" deleted
   secret "cndbtier-server-secret" deleted
   secret "cndbtier-trust-store-secret" deleted

3. Run the following command to delete the PVC occurrences:

   $ kubectl -n ${OCCNE_NAMESPACE} delete pvc --all

   Upon successful deletion, the following messages are displayed:

   persistentvolumeclaim "pvc-backup-ndbmtd-ndbmtd-0" deleted
   persistentvolumeclaim "pvc-backup-ndbmtd-ndbmtd-1" deleted
   persistentvolumeclaim "pvc-ndbmgmd-ndbmgmd-0" deleted
   persistentvolumeclaim "pvc-ndbmtd-ndbmtd-0" deleted
   persistentvolumeclaim "pvc-ndbmtd-ndbmtd-1" deleted
   persistentvolumeclaim "pvc-ndbmysqld-ndbmysqld-0" deleted
   persistentvolumeclaim "pvc-ndbmysqld-ndbmysqld-1" deleted
   persistentvolumeclaim "pvc-ndbappmysqld-ndbappmysqld-0" deleted
   persistentvolumeclaim "pvc-ndbappmysqld-ndbappmysqld-1" deleted
   persistentvolumeclaim "pvc-siteb-sitea-replication-svc" deleted  

4. Run the following command to delete the cnDBTier namespace:

   $ kubectl delete ns ${OCCNE_NAMESPACE}

   Upon successful deletion, the following message is displayed:

   namespace "occne-cndbtier" deleted