Refresh (upgrade)

This charm supports in-place upgrades to higher versions via Juju’s refresh command.

Supported refreshes

VM

From		To
Charm revision	MySQL Version	Charm revision	MySQL Version

K8s

From		To
Charm revision	MySQL Version	Charm revision	MySQL Version

To upgrade from MySQL 8.0, the data must be migrated manually. See: How to migrate a cluster.

Juju version upgrade

Before refreshing the charm, make sure to check the Release notes page to see if there any requirements for the new revision, such as a Juju version upgrade.

• Upgrade Juju

Refresh guides

To refresh a single cluster, see:

• Single cluster
  • Refresh
  • Roll back

To refresh a multi-cluster deployment, see:

• Multi-cluster
  • Refresh
  • Roll back