How to do it...

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

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

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

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

1. Restart the OpenStack Cinder services:

        # service openstack-cinder-volume restart

1. Source the keystone_admin files for OpenStack:

        # source /root/keystonerc_admin
        # cinder list

1. 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

1. 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

1. Similarly, try creating another volume using the OpenStack horizon dashboard.