glusterfs:
 server:
   peers:
   - 192.168.1.21
   - 192.168.1.22
   - 192.168.1.23
   volumes:
      glance:
        storage: /srv/glusterfs/glance
        replica: 3
        bricks:
        - 172.168.1.21:/srv/glusterfs/glance
        - 172.168.1.21:/srv/glusterfs/glance
        - 172.168.1.21:/srv/glusterfs/glance
   enabled: true