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 replica set with at least three-nodes deployed
- Access to S3 storage
- Have configured settings for S3 storage
- Have the backups from the previous cluster in your S3-storage
- Have the password 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 mongodb/leader set-password password=<previous cluster password>
To view the available backups to restore you can enter the command list-backups:
juju run mongodb/leader list-backups
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 | logical | 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 mongodb/leader restore backup-id=YYYY-MM-DDTHH:MM:SSZ
Your restore will then be in progress, once it is complete your cluster will represent the state of the previous cluster.