[lxc-users] LXC, criu and cgroups...

[Dirk Geschke]

Hi Tycho,

> On Sun, Apr 05, 2015 at 11:31:48AM +0200, Dirk Geschke wrote:
> > Hi all,
> > 
> > I was just playing with lxd and tried the move command but it
> > failed with 
> > 
> >    error: checkpoint failed
> > 
> > I think, this is not a problem of lxd but of criu with cgroups.
> > 
> > The running container is semi-unprivileged, I can start it without
> > problems.
> 
> We currently cannot migrate unprivileged containers, so any container
> you want to migrate needs to be a privileged container.

:-/

> > But if I use cgmanager, then criu fails with:
> > 
> >    Error (mount.c:624): 94:./sys/fs/cgroup/cgmanager doesn't have a proper root mount
> 
> This should be fixed by a patch I posted to the mailing list a few
> weeks ago (it finally got acked last Friday, and I think the plan is
> to push it today, so you might re-try with the daily build tomorrow).

Ah, that sounds good. I'm excited to test it.

I guess this is a patch for lxc-1.1.x and not lxd-0.5 or criu?

> Once these are pushed, I will do a blog post on exactly the
> configuration and versions of things needed to checkpoint and restore
> containers with LXD.

Cool, I'm looking forward to read it!

Thanks for your response and enjoy the rest of the easter days!

Best regards

Dirk
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