[CRIU] CRIU Docker Restore with Error: Bad File Size

[Saied Kazemi]

Hi Zhang,

Since you're not using AUFS, I assume you're using VFS.  Can you confirm
please?

As http://criu.org/Docker explains, you need to bind mount the container's
root filesystem before attempting to restore.  Also, can you try the
docker_cr.sh helper script that is in the contrib subdirectory of CRIU
sources to checkpoint and restore your container?

--Saied


On Tue, Aug 4, 2015 at 10:21 AM, Pavel Emelyanov <xemul at parallels.com>
wrote:

> On 08/04/2015 11:04 AM, Z F wrote:
> > Hi,
> >
> > I am trying criu docker checkpoint/restore  external example (without
> AUFS) provided by Docker <
> http://criu.org/Docker#Restore_Prework_for_External_C.2FR>
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > Docker <http://criu.org/Docker#Restore_Prework_for_External_C.2FR>
> > This HOWTO page describes how to checkpoint and restore a Docker
> container.
> > View on criu.org <
> http://criu.org/Docker#Restore_Prework_for_External_C.2FR>
> >
> > Preview by Yahoo
> >
> >
> >
> > The experiment was in the same host. And the restore failed with error:
> >
> > (00.210352)      1: Error (files-reg.c:1055): File usr/bin/bash has bad
> size 960384 (expect 960392)
> > (00.210357)      1: Error (cr-restore.c:255): Can't fixup VMA's fd
> > (00.214642) Error (cr-restore.c:1912): Restoring FAILED.
> >
> >
> > The cause is that the /usr/bin/bash in host and container have different
> size.
>
> That's weird. CRIU should pick the bash from container. So which bash is
> which? Is
> the actual size the host's one and expected the container's or vice-versa?
>
> > While in my mind, restore of container would load the container's image
> and file system and load the container's bash. Anything wrong with my
> experiment?
> >
> > Test log and criu log attached. Thank you very much!
> >
> >
> >
> > Best Regards
> > Zhang Fan
> >
> >
> > _______________________________________________
> > CRIU mailing list
> > CRIU at openvz.org
> > https://lists.openvz.org/mailman/listinfo/criu
> >
>
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