LXD: Расширение пула btrf:
Процедура:
sudo truncate -s +5G /var/lib/lxd/disks/<POOL>.img
sudo losetup -c <LOOPDEV>
sudo btrfs filesystem resize max /var/lib/lxd/storage-pools/<POOL>/
=========================================================
root@hostname:/var/lib/lxd/disks# btrfs filesystem show
Label: 'default' uuid: 552ce885-db9b-4f3a-ac2b-212c0de679de
Total devices 1 FS bytes used 128.37GiB
devid 1 size 139.70GiB used 136.02GiB path /dev/loop2 <<<< это LOOPDEV
root@hostname:/var/lib/lxd/disks# sudo truncate -s +50G /var/lib/lxd/disks/default.img
sudo losetup -c /dev/loop2
root@hostname:/var/lib/lxd/disks# btrfs filesystem resize max /var/lib/lxd/storage-pools/default/
Resize '/var/lib/lxd/storage-pools/default/' of 'max'
root@hostname:/var/lib/lxd/disks# lxc storage show default
config:
size: 150GB
source: /var/lib/lxd/disks/default.img
root@hostname:/var/lib/lxd/disks# btrfs filesystem show
Label: 'default' uuid: 552ce885-db9b-4f3a-ac2b-212c0de679de
Total devices 1 FS bytes used 128.37GiB
devid 1 size 189.70GiB used 136.02GiB path /dev/loop2
btrfs qgroup show /var/lib/lxd/storage-pools/default
ERROR: can't list qgroups: quotas not enabled <<< квота отключена