[lxc-users] New live migration issues
Stéphane Graber
stgraber at ubuntu.com
Mon May 16 15:22:24 UTC 2016
On Mon, May 16, 2016 at 08:52:34AM +0000, Jamie Brown wrote:
> Hello again,
>
> I’m now running LXD 2.0.0 on Ubuntu 16.04 LTS after having some amount of success with a previous BETA on 14.04.
>
> However, after a fresh install, the first attempt at a live migration has failed;
>
> lxc launch ubuntu:xenial host2:migrate
> lxc move migrate host3:
> error: Error transferring container data: restore failed:
> (00.499626) 1: Error (mount.c:2406): mnt: Can't mount at ./sys/kernel/debug: Invalid argument
> (00.515123) Error (cr-restore.c:1350): 8965 exited, status=1
> (00.573498) Error (cr-restore.c:2182): Restoring FAILED.
https://bugs.launchpad.net/ubuntu/+source/criu/+bug/1575732
Unmount /sys/kernel/debug/tracing from the source host and inside the
container, then migration should work fine.
>
> The end of the migration log on host3;
> (00.499574) 1: mnt: 129:./sys/fs/cgroup/net_cls,net_prio private 1 shared 0 slave 0
> (00.499588) 1: mnt: Mounting securityfs @./sys/kernel/security (0)
> (00.499593) 1: mnt: Bind /sys/kernel/security/ to ./sys/kernel/security
> (00.499603) 1: mnt: 276:./sys/kernel/security private 0 shared 0 slave 1
> (00.499610) 1: mnt: Mounting debugfs @./sys/kernel/debug (0)
> (00.499615) 1: mnt: Bind /sys/kernel/debug/ to ./sys/kernel/debug
> (00.499626) 1: Error (mount.c:2406): mnt: Can't mount at ./sys/kernel/debug: Invalid argument
> (00.515123) Error (cr-restore.c:1350): 8965 exited, status=1
> (00.555143) Switching to new ns to clean ghosts
> (00.572964) uns: calling exit_usernsd (-1, 1)
> (00.573065) uns: daemon calls 0x4523c0 (8960, -1, 1)
> (00.573108) uns: `- daemon exits w/ 0
> (00.573458) uns: daemon stopped
> (00.573498) Error (cr-restore.c:2182): Restoring FAILED.
>
> Both hosts have criu installed and are running the same kernel version (4.4.0-22-generic). The CPU and hardware profile is absolutely identical.
>
> Both hosts are using ZFS file storage.
>
> Stop and copy between hosts works without issue. The criu dump also completes successfully, so the issue appears to be with criu restore.
>
> Any ideas?
>
> Thanks,
>
> Jamie
> _______________________________________________
> lxc-users mailing list
> lxc-users at lists.linuxcontainers.org
> http://lists.linuxcontainers.org/listinfo/lxc-users
--
Stéphane Graber
Ubuntu developer
http://www.ubuntu.com
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