This section describes how to delete Postgres pods, and other resources that are created when you deploy a Postgres instance to Kubernetes.
When deleting the Postgres instance and its resources, every resource related to that instance is deleted, including the access secrets. The PVCs associated with the instance would be deleted or retained depending upon the PVC retention policy you have configured, see Configure Persistent Volume Claim Retention Policy.
NOTE: Any application bound to the deleted instance will have to rebind with new credentials.
Follow these steps to delete a Postgres instance from Kubernetes.
Change to the VMware Postgres Operator workspace directory with the Kubernetes manifest you used to deploy the Postgres instance.
kubectl delete command, specifying the manifest you used to deploy the instance. The
kubectl delete command stops the Postgres instance, and deletes the Kubernetes resources for the deployment.
kubectl delete -f ./postgres.yaml --wait=false
where the optional
wait=false flag returns immediately, without waiting for the deletion to complete. The command returns an output similar to:
postgres.sql.tanzu.vmware.com "postgres-sample" deleted
If for any reason stopping the Postgres instance fails, use
kubectl to display the
kubectl logs -l app=postgres-operator
The Postgres operator should remain for future deployments:
kubectl get all
NAME READY STATUS RESTARTS AGE pod/postgres-operator-546ffd888b-dc6zk 1/1 Running 0 26h NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 40h service/postgres-operator-webhook-service ClusterIP 10.98.126.247 <none> 443/TCP 26h NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/postgres-operator 1/1 1 1 26h NAME DESIRED CURRENT READY AGE replicaset.apps/postgres-operator-546ffd888b 1 1 1 26h
If you want to remove the Postgres Operator, follow the instructions in Uninstalling VMware SQL with Postgres for Kubernetes.
Warning: Do not delete the Postgres Operator when there are existing Postgres instances. If the Postgres Operator is deleted, you will get an error if you try to reinstall it. See Cannot Reinstall Operator after Deleting for a workaround to this problem.