Charmed MySQL K8s

Channel Revision Published Runs on
8.0/stable 153 27 Jun 2024
Ubuntu 22.04
8.0/candidate 153 26 Jun 2024
Ubuntu 22.04
8.0/beta 160 Today
Ubuntu 22.04
8.0/beta 161 Today
Ubuntu 22.04
8.0/edge 161 05 Jul 2024
Ubuntu 22.04
8.0/edge 160 05 Jul 2024
Ubuntu 22.04
juju deploy mysql-k8s --channel 8.0/stable
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How to restore foreign backup

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 MySQL 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 mysql-k8s/leader set-password username=root password=<previous cluster password> --wait
juju run-action mysql-k8s/leader set-password username=clusteradmin password=<previous cluster password> --wait
juju run-action mysql-k8s/leader set-password username=serverconfig password=<previous cluster password> --wait

To view the available backups to restore you can enter the command list-backups:

juju run-action mysql-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 mysql-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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