[lxc-users] Rootfs Changes?

[Pete Osborne]

Hello,

I upgraded one of my LXD hyper-visors to the latest LXD and all of my
containers are complaining about the rootfs not (no longer) allowing the
source to be set.

Specifically, when I attempt to edit the configuration, lxd adds a new
root: disk and provides this error:
Config parsing error: Root disk entry may not have a "source" property set.
Press enter to start the editor again

Perhaps I am using LXD in an unsupported way... I'm using lvm and I have 2
volume groups, one is made up of hdd's, and the other is ssd's. Both have a
thinpool which I use to create logical volumes.

When I created my containers I wasn't having much luck with the lvm backend
so I created the containers on disk instead, I then shut down the
container, moved the rootfs into a pre-created ext4 logical volume, I then
set the source on the disk in my configuration, added some additional
disks, and boot the system back up. I've done this with several containers
and it has been working great.

I have been able to work around the issue by simply mounting my logical
volume to /var/lib/lxd/containers/<container>/rootfs

But lxd used to mount/use the device automatically which was pretty cool.
Wondering if anyone else has encountered the issue and if there is a better
solution than what I've come up with. Is lxd now more aware of the
preferred backend storage and is intentionally trying to prevent me from
doing something bad?

Here's what my config used to look like:

name: gitlab-runner6
profiles:
- privileged
config:
  volatile.base_image:
2b5b105c717b0ee854b6717c9f6999fba40b1fc2447f31d6f87b520e28a163bb
  volatile.eth0.hwaddr: 00:16:3e:25:18:73
  volatile.eth0.name: eth0
  volatile.last_state.idmap: '[]'
devices:
  homedir:
    path: /home
    source: /dev/sdd_group/gitlab-runner6-home
    type: disk
  rootfs:
    path: /
    type: disk
    source: /dev/hdd_group/gitlab-runner6
ephemeral: false

Thanks,
Pete
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