Ordinarily, Cinder volumes can only be attached to one instance at a time. Thus, you need to detach it from one instance before attaching it to another. To detach a volume, we will use another OpenStack client command called openstack server remove volume.
To detach a volume from an instance, you will need the following:
The
openstackcommand-line clientAn
openrcfile with appropriate credentials for the environmentThe name or ID of the volume to detach
The name or ID of the instance to detach the volume from
For our example, these values are as follows:
Volume:
cookbook.volumeInstance:
cookbook.testMount point:
/mnt1
Carry out the following steps to detach a volume to an instance using the openstack client:
List running instances to get the ID of our instance:
List the volumes that are available and
in-usein our environment:openstack volume listThis will bring back an output like the following. Note that the information provided...