Steps

1. Stop noobaa-operator pod from running

   kubectl scale deployment noobaa-operator --replicas 0
   

2. Stop noobaa-core and noobaa-endpoint

   kubectl scale statefulset noobaa-core --replicas 0
   kubectl scale deployment noobaa-endpoint --replicas 0
   

3. Go into noobaa-db-pg-0 pod and change the password for user noobaa in psql

   kubectl exec -it noobaa-db-pg-0 -- bash
   psql -d nbcore
   ALTER USER noobaa WITH PASSWORD 'myNewPassword';
   

4. Change the password in noobaa-db secret which holds the Postgres credentials for all other pods.
   the best way to do that is to add stringData object to the secret. The values in stringData will be encoded as base64 automatically

   k edit secrets noobaa-db
   

   e.g.

   # Please edit the object below. Lines beginning with a '#' will be ignored,
   # and an empty file will abort the edit. If an error occurs while saving this file will be
   # reopened with the relevant failures.
   #
   apiVersion: v1
   data:
     password: YmxhYmxh
     user: bm9vYmFh
   
   stringData: # <<<===== add stringData
     password: "myNewPassword" # <<<===== write new password as string (not base64)
   
   kind: Secret
   metadata:
     creationTimestamp: "2022-01-16T08:39:57Z"
     labels:
       app: noobaa
     name: noobaa-db
     namespace: test-58
     ownerReferences:
     - apiVersion: noobaa.io/v1alpha1
       blockOwnerDeletion: true
       controller: true
       kind: NooBaa
       name: noobaa
       uid: 0e313a83-7a0e-43d6-94b0-a7a12845ee5e
     resourceVersion: "45172"
     uid: 57c09bb0-8f31-4c29-9f84-933cb46f9d78
   type: Opaque
   

   after saving this should look like this:

   apiVersion: v1
   data:
     password: bXlOZXdQYXNzd29yZA==  # <<<==== new password in base64
     user: bm9vYmFh
   kind: Secret
   metadata:
     creationTimestamp: "2022-01-16T08:39:57Z"
     labels:
       app: noobaa
     name: noobaa-db
     namespace: test-58
     ownerReferences:
     - apiVersion: noobaa.io/v1alpha1
       blockOwnerDeletion: true
       controller: true
       kind: NooBaa
       name: noobaa
       uid: 0e313a83-7a0e-43d6-94b0-a7a12845ee5e
     resourceVersion: "45804"
     uid: 57c09bb0-8f31-4c29-9f84-933cb46f9d78
   type: Opaque
   

5. Restart all pods

   kubectl scale deployment noobaa-endpoint --replicas 1
   kubectl scale statefulset noobaa-core --replicas 1
   kubectl scale deployment noobaa-operator --replicas 1