Cloudera Docs

Backing up Data Visualization applications

You can use kubectl or k9s to back up Data Visualization (DataViz) applications in an AWS environment.

To keep the charts and dashboards that you created, you must save and restore Data Visualization data.

If you did not make changes to the environment for Data Visualization, skip these steps; otherwise, perform these steps on each of your Data Visualization applications because each Data Visualization uses a separate database.

  • Data Visualization must use the DataLake Postgres instance for storing its metadata.
  1. Find the necessary information, such as database name, host, port, user, and password. 
    $ kubectl get secrets/pg-db-secret -o=jsonpath={.data.'\.pgpass'} -n viz-1680129861-kbtr | base64 -D
    postgres-service:5432:metastore:hive:ZufGC6Dmh03N1iW042uTosZtr4XvCtJIYPQ==
  2. Use kubectl or k9s to access the Hue container in the targeted CDW environment (need KUBECONFIG setup), and find the namespace for Hue and for DataViz. 
    $ kubectl get pods --all-namespaces --field-selector metadata.name=huebackend-0

$ kubectl get pods --all-namespaces --field-selector metadata.name=viz-webapp-0

    If you are running multiple DataViz instances, make a note of the DataViz namespaces and their user-provided friendly names from the CDW UI. On the new cluster, the namespace names will change, so it’s important to know where to load the corresponding DataViz deployment.

  3. Select one of the Hue namespaces and shell into the container. 
    $ kubectl exec -it huebackend-0 -n <virtual warehouse ID> -c hue -- /bin/bash
  4. Get the dump using the code below by providing a DataViz namespace. All DataViz databases can be backed up from this container. If you have multiple namespaces, make a note of the friendly DataViz name pairs.
    pg_dump -U hive -h postgres-service -W -F t <DataViz namespace>_vizdb > ./viz_pg_dump.tar
    If you have multiple DataViz instances running, backup all databases in this step. It is important to use a naming convention that will allow you to identify which database back-up contains the contents of the corresponding DataViz database. This is needed, as the namespace names will be different on the new cluster.
  5. Copy the dump file to your local machine.
    For example:
    kubectl cp <virtual warehouse ID>/huebackend-0:/opt/hive/viz_pg_dump.tar ~/Downloads/logs/viz_pg_dump.tar -c hue