[lxc-devel] Question on lxc-snapshot directory

[John Peacock]

Hardcoding the snapshot directory to be lxcpath+snaps is somewhat
limiting.  I have mounted a btrfs subvolume on /var/lib/lxc, which works
fine; I can freely clone using btrfs snapshots in less than a second.
However, lxc-snapshot fell over completely because /var/lib/lxcsnaps was
a different filesystem, so the snapshot failed.

I wound up creating a "container" directory under /var/lib/lxc and
overriding lxcpath, so that the "containersnaps" was in the same
filesystem.

Would it be reasonable to create a config value for the snapshot
directory (lxcsnappath) and allow that to point to a hidden directory
under the top level lxcpath folder (which would require making lxc-ls
smart enough to ignore hidden directories)?  Alternatively, the snapshot
folder could alternatively be rootfs.snap under the container folder
itself (which is virtually guaranteed to be the same filesystem).

I would be happy to attempt a patch to make either option available.

John

-- 
JOHN PEACOCK
senior software build and release engineer
www.messagesystems.com
twitter @MessageSystems

tel 410-872-4910 x239
email john.peacock at messagesystems.com