On Mon, 25 Nov 2013 21:58:13 -0500 Stéphane Graber <stgra...@ubuntu.com> wrote:
> On Tue, Nov 26, 2013 at 04:04:36AM +0200, Marian Marinov wrote: > > Hey guys, > > I just read on LWN about the checkpoint/restore tool: > > http://lwn.net/Articles/574917/ > > > > With this, it seams possible to freeze and restore a whole > > container from one node to another. > > > > I'll give it a try this week to give more details on how it > > actually works. > > > > Marian > > I think I last tried it with CRIU 0.8 without much success but I took > an action item during Ubuntu's planning even last week to try with a > newer release and get in touch with Pavel if I'm still having issues. Hi all, I also started looking into this (just trying to dump a simple busybox container) and the first thing I ran into is that criu can't dump init's fd 0 -> /dev/zero. I believe this is because that inode is outside the container (ie. its the hosts' /dev/zero). I'm looking into having lxc_start open std[in,out,err] in do_start after it has cloned into the namespace. This means the container would have to have a /dev/zero and /dev/null. > From what we discussed at Linux Plumbers, CRIU should indeed let you > dump a full container and restore it on the same machine or on another > so long as the filesystem and any other external dependency of the > container matches. > > If I can get this working and they've resolved a few of the known > issues (specifically the fact that it'd only build on x86_64), then > the plan is to add API calls to LXC's API that'll implement the > checkpoint/restore feature using CRIU. Assuming we can get it to work, I think we'd rather link to some sort of libcriu than to system() out to criu? If that is the case I think we'll need to do a bit of packaging work to make such a lib in crtools. ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk _______________________________________________ Lxc-devel mailing list Lxc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-devel
