With the ControllerGetVolumeGroup operation the caller can verify that a
VolumeGroup exists, and validate the volumes that are part of it.
Signed-off-by: Niels de Vos <ndevos@ibm.com>
The ModifyVolumeGroupMembership operation can be used to change the
volumes that are part of a VolumeGroup. Only empty VolumeGroups can be
removed, this operation is required to make that possible.
Signed-off-by: Niels de Vos <ndevos@ibm.com>
Add extra error checking to make sure trying to create an existing
volume group does not result in a failure. The same counts for deleting
a non-existing volume group, and adding/removing volumes to/from the
volume group.
Signed-off-by: Niels de Vos <ndevos@ibm.com>
Register the volumegroup controller as part
of rbd controller server to serve the volume
group RPC spec.
Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
