<div dir="ltr">Hi Pradeep,<div><br></div><div>The official response should come from the CRIU development team but since I have been looking at this issue I can provide some info.</div><div><br></div><div>Dumping and restoring Docker containers using CRIU as-is is not possible at the moment.</div>
<div><br></div><div>As you noted, work is in progress, but it will take some time to finish. So far, support for external bind mounts (e.g., /etc/hosts for Docker containers) and restoration of control groups has been added and is already available in 1.3-rc2.</div>
<div><br></div><div>If you use the VFS graph driver (as opposed to the default AUFS), it's possible to dump and restore a container with CRIU using the external bind mount options. However, currently there is no way to tell Docker that a container was restored, so "docker ps" would show its status as exited.</div>
<div><br></div><div>Work is underway to add AUFS support to CRIU as well as checkpoint/restore support in libcontainer and Docker. Ultimately checkpointing and restoring Docker containers should be done by Docker itself (e.g., docker checkpoint, docker restore) with a call to CRIU for doing the actual checkpoint and restore operation.</div>
<div><br></div><div>Hope this helps...</div><div><br></div><div>--Saied</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Aug 5, 2014 at 3:19 PM, Pradeep Padala <span dir="ltr"><<a href="mailto:ppadala@gmail.com" target="_blank">ppadala@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi,<div><br></div><div>I tried checkpointing the docker container with the latest version of criu and got the following error.</div>
<div><br></div><div><div>./criu dump -t 15814 --images-dir /tmp/docker</div>
<div>Error (mount.c:449): 225:./dev/console doesn't have a proper root mount</div><div>Error (cr-dump.c:1882): Dumping FAILED.</div></div><div><br></div><div>I saw that there's been some progress on this lately and was not sure, if this has been fixed yet. Is there a timeframe on when the docker container c/r will be supported?</div>
<div><br></div><div>Let me know.</div><div><br>Thanks,</div><div>Pradeep</div></div>
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