[CRIU] Not able to checkpoint docker container with criu-1.3-rc2

[Pradeep Padala]

Hi Saied,

Thanks for your detailed reply. I changed the storage driver to vfs, but
still getting the same error. Am I missing something here?

$ ./criu --version
Version: 1.3-rc2
GitID: 5cb0c0d

$ docker info
Containers: 2
Images: 3
Storage Driver: vfs
Execution Driver: native-0.2
Kernel Version: 3.15.7-200.fc20.x86_64

$ ./criu dump -t 1473 -D /tmp/docker
Error (mount.c:449): 147:./dev/console doesn't have a proper root mount
Error (cr-dump.c:1914): Dumping FAILED.

Regards,
Pradeep


On Tue, Aug 5, 2014 at 9:35 PM, Saied Kazemi <saied at google.com> wrote:

> Hi Pradeep,
>
> The official response should come from the CRIU development team but since
> I have been looking at this issue I can provide some info.
>
> Dumping and restoring Docker containers using CRIU as-is is not possible
> at the moment.
>
> 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.
>
> 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.
>
> 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.
>
> Hope this helps...
>
> --Saied
>
>
>
>
> On Tue, Aug 5, 2014 at 3:19 PM, Pradeep Padala <ppadala at gmail.com> wrote:
>
>> Hi,
>>
>> I tried checkpointing the docker container with the latest version of
>> criu and got the following error.
>>
>> ./criu dump -t 15814 --images-dir /tmp/docker
>> Error (mount.c:449): 225:./dev/console doesn't have a proper root mount
>> Error (cr-dump.c:1882): Dumping FAILED.
>>
>> 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?
>>
>> Let me know.
>>
>> Thanks,
>> Pradeep
>>
>> _______________________________________________
>> CRIU mailing list
>> CRIU at openvz.org
>> https://lists.openvz.org/mailman/listinfo/criu
>>
>>
>
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