Migrating automatically-provisioned services¶
MicroCeph deploys automatically-provisioned Ceph services when needed. These services include:
It can however be useful to have the ability to move (or migrate) these services from one node to another. This may be desirable during a maintenance window for instance where these services must remain available.
This is the purpose of the cluster migrate command. It enables automatically-provisioned services on a target node and disables them on the source node.
The syntax is:
sudo microceph cluster migrate <source> <destination>
Where the source and destination are node names that are available via the status command:
sudo microceph status
Post-migration, the status command can also be used to verify the distribution of services among nodes.
It’s not possible, nor useful, to have more than one instance of an automatically-provisioned service on any given node.
RADOS Gateway services are not considered to be of the automatically-provisioned type; they are enabled and disabled explicitly on a node.