In the last recipe, we learned to configure Glance to use Ceph. In this recipe, we will learn to use the Ceph RBD with the Cinder service of OpenStack:

1. Since in this demonstration we are not using multiple backend cinder configurations, comment the enabled_backends option from the /etc/cinder/cinder.conf file:
2. Navigate to the options defined in cinder.volume.drivers.rbd section of the /etc/cinder/cinder.conf file and add the following (replace the secret UUID with your environments value):

        volume_driver = cinder.volume.drivers.rbd.RBDDriver
        rbd_pool = volumes
        rbd_user = cinder
        rbd_secret_uuid = e279566e-bc97-46d0-bd90-68080a2a0ad8
        rbd_ceph_conf = /etc/ceph/ceph.conf
        rbd_flatten_volume_from_snapshot = false
        rbd_max_clone_depth = 5
        rbd_store_chunk_size = 4
        rados_connect_timeout = -1
        glance_api_version = 2

3. Execute the following command to verify the previous entries:

        # cat /etc/cinder/cinder.conf | egrep "rbd|rados|version" | 
          grep -v "#"

4. Comment enabled_backend=lvm option in /etc/cinder/cinder.conf:

5. Restart the OpenStack Cinder services:

        # service openstack-cinder-volume restart

6. Source the keystone_admin files for OpenStack:

        # source /root/keystonerc_admin
        # cinder list

7. To test this configuration, create your first Cinder volume of 2 GB, which should now be created on your Ceph cluster:

        # cinder create --display-name ceph-volume01 
          --display-description "Cinder volume on CEPH storage" 2

8. Check the volume by listing the Cinder and Ceph volumes pool:

        # cinder list

        # rbd -p volumes ls --id cinder

        # rbd info volumes/volume-7443e2b6-0674-4950-9371-49094a1702a7 
          --id cinder