LXC config restore


Renowned Member
Dec 12, 2014

I modified my container config file a bit to forward USB devices.

lxc.cgroup.devices.allow: c 189:385 rwm
lxc.mount.entry: /dev/bus/usb/004/002 dev/bus/usb/004/002 none bind,optional,create=file
lxc.cgroup.devices.allow: c 188:* rwm
lxc.mount.entry: /dev/ttyUSB0 dev/ttyUSB1 none bind,optional,create=file

Each time after I restore a snapshot, the modifications are ignored and I have to add them again manually.
Is this behavior on purpuse? I my case it's a bit annoying.
If you restore a snapshot that was made after you added the options to your container, they should be restored too.

If you take a look at your container config, you should see the individual configurations that will be restored by a snapshot below the main configuration (in [snapshot-name] sections). Check if the snapshot you want to restore has the options set in its configuration section. If not, it should be fine to add it there as well.
Sorry, I used the wrong wording in my previous post.
I'm talking about backups not snapshots.
I checked the backup dump file. I guess the config is stored in the /etc/vzdump/pct.conf
This file includes all my modifications, but skipped on restore.
That is intended behaviour if you are not root, for security reasons. Restoring a container only restores a set of whitelisted parameters.

Incidentally, it seems there is currently a bug where even if you are root, custom options will not be restored.
I have opened an issue on our bugtracker for you, you can check it's status here.


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