Add support for BTRFS

config.yaml

@@ -54,6 +54,7 @@ options:
       .
         xfs (Default >= 0.55)
         ext4 (Only option < 0.55)
+        btrfs (experimental and not recommended)
       .
       Only supported with ceph >= 0.55.      
   osd-reformat:

hooks/ceph.py

@@ -85,6 +85,12 @@ def add_bootstrap_hint(peer):
         # Ignore any errors for this call
         subprocess.call(cmd)
 
+DISK_FORMATS = [
+    'xfs',
+    'ext4',
+    'btrfs'
+    ]
+
 
 def is_osd_disk(dev):
     try:

hooks/hooks.py

@@ -29,7 +29,7 @@ def install_upstart_scripts():
 def install():
     utils.juju_log('INFO', 'Begin install hook.')
     utils.configure_source()
-    utils.install('ceph', 'gdisk', 'ntp')
+    utils.install('ceph', 'gdisk', 'ntp', 'btrfs-tools')
     install_upstart_scripts()
     utils.juju_log('INFO', 'End install hook.')
 
@@ -53,16 +53,18 @@ def config_changed():
 
     utils.juju_log('INFO', 'Monitor hosts are ' + repr(get_mon_hosts()))
 
-    fsid = utils.config_get('fsid')
-    if fsid == '':
+    # Pre-flight checks
+    if not utils.config_get('fsid'):
         utils.juju_log('CRITICAL', 'No fsid supplied, cannot proceed.')
         sys.exit(1)
-
-    monitor_secret = utils.config_get('monitor-secret')
-    if not monitor_secret:
+    if not utils.config_get('monitor-secret'):
         utils.juju_log('CRITICAL',
                        'No monitor-secret supplied, cannot proceed.')
         sys.exit(1)
+    if utils.config_get('osd-format') not in ceph.DISK_FORMATS:
+        utils.juju_log('CRITICAL',
+                       'Invalid OSD disk format configuration specified')
+        sys.exit(1)
 
     emit_cephconf()