[CRIU] question on live migration for docker container using CRIU

[Pavel Emelyanov]

On 12/31/2014 04:36 AM, mona kashkoush wrote:
> 
> i tried to  do a live migration for docker container using CRIU 1.4 but dumping failed and this error appeared
> 
> $  criu dump --tree <pid> --images-dir <path-to-existing-directory> --leave-stopped
> 
> Error (mount.c:624): 125:./etc/hosts doesn't have a proper root mount
> Error (files-reg.c:764): Unaccessible path opened 52:21244, need 5:1029
> Error (cr-dump.c:1601): Dump files (pid: 3906) failed with -1
> Error (cr-dump.c:1964): Dumping FAILED.
> 
> and when i used the automated script "docker_cr.sh " for docker container migration , this succeeded for 
> dumping  but failed for restoring and this error appeared
> 
> $ /src/criu-1.4/contrib/docker_cr.sh -r -v <container_id>
> 
> restore failed
> (00.072030)      1: Error (mount.c:1543): Can't mount at ./.dockerinit: No such file or directory

Hm... This looks like some missed --ext-mount-map thing. Can you find out the
exact command line docker_cr.sh calls CRIU with?

Hopefully Saied (in Cc) can also advise something.

> (00.072076) Error (cr-restore.c:1838): Restoring FAILED.
> 
> * this is information about docker which i used
> 
> Storage Driver: aufs
>  Root Dir: /var/lib/docker/aufs
>  Dirs: 67
> Execution Driver: native-0.2
> Kernel Version: 3.13.0-43-generic
> 
> thanks for your time
> 
> -- 
> Mona Salah
> Research Assistant 
> IRI institute 
> The City of Scientific Research and Technology Applications,Alex , Egypt  
> 
> 
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