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

[Pavel Emelyanov]

On 08/05/2015 05:24 AM, Z F wrote:
> Hi,
> 
> About file sizes: 
> 
> //In containers
> bash-4.2# ls -lt /usr/bin/bash
> -rwxr-xr-x. 1 root root 960392 Sep 25  2014 /usr/bin/bash
> bash-4.2# 
> //In host
> [root at compute2 dockerbins]# ls -lt /usr/bin/bash
> -rwxr-xr-x. 1 root root 960384 Sep 26  2014 /usr/bin/bash
> [root at compute2 dockerbins]# 
> 
> 
> 
> About FS: I am using VFS.
> 
> 
> 
> As explained in the http://criu.org/Docker, --root is necessary for AUFS only. Then I suppose --root is not necessary for VFS, then the container's root filesystem would be at the default /var/lib/docker/containers/<container-id>/. Is that correct?
> 
> About mount, 3 cases tested:
> 1. No --root, no mount --rbind:  bad file size error.
> 2. No --root, mount --rbind: bad file size error.
> 3. docker_cr.sh:
> (00.011447)      1: Error (mount.c:1861): Can't mount at ./proc: No such file or directory
> (00.034211) Error (cr-restore.c:1219): 63981 exited, status=1
> (00.034228) Error (cr-restore.c:1912): Restoring FAILED.

(00.011392)      1: ----------------------------> Try to validate ./etc/resolv.conf 
(00.011395)      1: ----------------------------> Try to validate ./etc/hostname 
(00.011397)      1: ----------------------------> Try to validate ./etc/hosts 
(00.011404)      1: ----------------------------> Try to validate ./proc/sys 
(00.011407)      1: ----------------------------> Try to validate ./proc/sysrq-trigger 
(00.011409)      1: ----------------------------> Try to validate ./proc/irq 
(00.011411)      1: ----------------------------> Try to validate ./proc/bus 
(00.011413)      1: ----------------------------> Try to validate ./proc/kcore 

There's no such print-s in criu code :)

(00.011416)      1: 146:./ private 1 shared 0 slave 0
(00.011420)      1: Start with 146:./
(00.011423)      1:     Mounting unsupported @./ (0)
(00.011428)      1:     Mounting proc @./proc (0)
(00.011447)      1: Error (mount.c:1861): Can't mount at ./proc: No such file or directory

Hm... No proc directory in the root you've specified.

-- Pavel