Charmed PostgreSQL K8s
- By Canonical Data Platform
|latest/stable||20||20 Sep 2022|
|14/stable||73||18 Apr 2023|
|14/candidate||73||18 Apr 2023|
|14/beta||73||18 Apr 2023|
juju deploy postgresql-k8s --channel 14/stable
You will need Juju 2.9 to be able to run this command. Learn how to upgrade to Juju 2.9.
Deploy Kubernetes operators easily with Juju, the Universal Operator Lifecycle Manager. Need a Kubernetes cluster? Install MicroK8s to create a full CNCF-certified Kubernetes system in under 60 seconds.
How to migrate cluster using backups
This is a How-To for restoring a backup that was made from the a different cluster, (i.e. cluster migration via restore). To perform a basic restore please reference the Restore How-To
Restoring a backup from a previous cluster to a current cluster requires that you:
- Have a single unit Charmed PostgreSQL deployed and running
- Access to S3 storage
- Have configured settings for S3 storage
- Have the backups from the previous cluster in your S3-storage
- Have the passwords from your previous cluster
When you restore a backup from an old cluster, it will restore the password from the previous cluster to your current cluster. Set the password of your current cluster to the previous cluster’s password:
juju run-action postgresql-k8s/leader set-password username=operator password=<previous cluster password> --wait juju run-action postgresql-k8s/leader set-password username=replication password=<previous cluster password> --wait juju run-action postgresql-k8s/leader set-password username=rewind password=<previous cluster password> --wait
To view the available backups to restore you can enter the command
juju run-action postgresql-k8s/leader list-backups --wait
This shows a list of the available backups (it is up to you to identify which
backup-id corresponds to the previous-cluster):
backups: |- backup-id | backup-type | backup-status ---------------------------------------------------- YYYY-MM-DDTHH:MM:SSZ | physical | finished
To restore your current cluster to the state of the previous cluster, run the
restore command and pass the correct
backup-id to the command:
juju run-action postgresql-k8s/leader restore backup-id=YYYY-MM-DDTHH:MM:SSZ --wait
Your restore will then be in progress, once it is complete your cluster will represent the state of the previous cluster.
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