Integrating Block Storage

To integrate Ceph block storage on OpenStack, you need to perform the operations on the Ceph storage node.

1. Update the PG status of the Object Storage Device (OSD) to active+clean.

   ceph osd getcrushmap -o /etc/ceph/crushmap 
   crushtool -d /etc/ceph/crushmap -o /etc/ceph/crushmap.txt 
   sed -i 's/step chooseleaf firstn 0 type host/step chooseleaf firstn 0 type osd/' /etc/ceph/crushmap.txt 
   grep 'step chooseleaf' /etc/ceph/crushmap.txt 
   crushtool -c /etc/ceph/crushmap.txt -o /etc/ceph/crushmap-new 
   ceph osd setcrushmap -i /etc/ceph/crushmap-new

2. On the Ceph storage node, enable Ceph OSD pools.

   ceph osd pool application enable volumes rbd 
   ceph osd pool application enable vms rbd 
   ceph osd pool application enable images rbd 
   ceph osd pool application enable backups rbd

3. On the OpenStack node that integrates Ceph storage, check whether Ceph is successfully configured.

   ceph -s

   An example of the expected result: