volume pool for LXC

[Guy Godfroy]

Hello,

Is it possible to use volume pools for LXC ? For instance LVM pools.

It seems to be supporte by LXC bare commands. From the man page of
lxc-create :

    -B, --bdev backingstore
        'backingstore' is one of 'dir', 'lvm', 'loop', 'btrfs', 'zfs',
'rbd', or 'best'. The default is 'dir', meaning that the container root
filesystem will be a directory under /var/lib/lxc/container/rootfs. This
backing store type allows the optional --dir ROOTFS to be specified,
meaning that the container rootfs should be placed under the specified
path, rather than the default. (The 'none' backingstore type is an alias
for 'dir'.) If 'btrfs' is specified, then the target filesystem must be
btrfs, and the container rootfs will be created as a new subvolume. This
allows snapshotted clones to be created, but also causes rsync
--one-filesystem to treat it as a separate filesystem. If backingstore
is 'lvm', then an lvm block device will be used and the following
further options are available: --lvname lvname1 will create an LV named
lvname1 rather than the default, which is the container name. --vgname
vgname1 will create the LV in volume group vgname1 rather than the
default, lxc. --thinpool thinpool1 will create the LV as a
thin-provisioned volume in the pool named thinpool1 rather than the
default, lxc. --fstype FSTYPE will create an FSTYPE filesystem on the
LV, rather than the default, which is ext4. --fssize SIZE will create a
LV (and filesystem) of size SIZE rather than the default, which is 1G.

        If backingstore is 'loop', you can use --fstype FSTYPE and
--fssize SIZE as 'lvm'. The default values for these options are the
same as 'lvm'.

        If backingstore is 'rbd', then you will need to have a valid
configuration in ceph.conf and a ceph.client.admin.keyring defined. You
can specify the following options : --rbdname RBDNAME will create a
blockdevice named RBDNAME rather than the default, which is the
container name. --rbdpool POOL will create the blockdevice in the pool
named POOL, rather than the default, which is 'lxc'.

        If backingstore is 'best', then lxc will try, in order, btrfs,
zfs, lvm, and finally a directory backing store.