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Diffstat (limited to 'cloudinit/config/cc_resizefs.py')
| -rw-r--r-- | cloudinit/config/cc_resizefs.py | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/cloudinit/config/cc_resizefs.py b/cloudinit/config/cc_resizefs.py index 0d282e63..cec22bb7 100644 --- a/cloudinit/config/cc_resizefs.py +++ b/cloudinit/config/cc_resizefs.py @@ -59,7 +59,17 @@ __doc__ = get_schema_doc(schema) # Supplement python help() def _resize_btrfs(mount_point, devpth): - return ('btrfs', 'filesystem', 'resize', 'max', mount_point) + # If "/" is ro resize will fail. However it should be allowed since resize + # makes everything bigger and subvolumes that are not ro will benefit. + # Use a subvolume that is not ro to trick the resize operation to do the + # "right" thing. The use of ".snapshot" is specific to "snapper" a generic + # solution would be walk the subvolumes and find a rw mounted subvolume. + if (not util.mount_is_read_write(mount_point) and + os.path.isdir("%s/.snapshots" % mount_point)): + return ('btrfs', 'filesystem', 'resize', 'max', + '%s/.snapshots' % mount_point) + else: + return ('btrfs', 'filesystem', 'resize', 'max', mount_point) def _resize_ext(mount_point, devpth): |