[lxc-users] LXD default NS mappings

[david.andel at bli.uzh.ch]

Addendum: I have seen now that the setting in /etc/subuid is used as expected on all hosts but the one where root is mapped to 1'000'000. There was a wrong setting in /etc/sub[ug]id where lxd and root had the same setting. Seems that 1'000'000 is a hard coded setting when the config is wrong?
But the question below remains. Do the mappings need to correspond in order to move containers around among hosts?

-----"lxc-users" <lxc-users-bounces at lists.linuxcontainers.org> wrote: -----
To: LXC users mailing-list <lxc-users at lists.linuxcontainers.org>
From: david.andel at bli.uzh.ch
Sent by: "lxc-users" 
Date: 01/27/2016 17:10
Subject: [lxc-users] LXD default NS mappings

Hi

I have noticed that LXD uses some UIDs/GIDs by default I haven't set up and which aren't represented in /etc/sub[ug]id files.
Interestingly, they are different from instance to instance: one one root is mapped on 1'000'000 (not 100'000), on another it's 265'536.
Now when I copy the rootfs of a container offline between different LXD or LXC instances according to http://stackoverflow.com/questions/33377916/migrating-lxc-to-lxd doesn't the UID/GID mapping need to be the same?
If not, why not?

Thanks!

D
 
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