[CRIU] Migrating docker container between two hosts - CGroup: device busy

[SreeKrishna]

Hi Guys,

I'm a CRIU noob and attempting to migrate a docker container between two
hosts. however, I get an error stating:


Error (criu/cgroup.c:1642): cg:     Can't mount controller dir
.criu.cgyard.g3irYd/cpu,cpuacct: Device or resource busy



Here are my specs:


*Host 1:*


➜  ~ uname -a
Linux ip-172-31-16-41 4.4.0-77-generic #98-Ubuntu SMP Wed Apr 26 08:34:02
UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
➜  ~
➜  ~ docker -v
Docker version 17.03.1-ce, build c6d412e
➜  ~
➜  ~
➜  ~ sudo criu check
Warn  (criu/autofs.c:77): Failed to find pipe_ino option (old kernel?)
Looks good.


*Host 2:*


➜  ~ uname -a
Linux mininet-vm 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22
15:32:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
➜  ~
➜  ~ docker -v
Docker version 17.03.1-ce, build c6d412e
➜  ~
➜  ~ sudo criu check
Looks good.



Here's how to reproduce it:

*Host 1:*


➜  ~ docker run -d --name looper --security-opt seccomp:unconfined busybox \
         /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep
1; done'
d830494e8bca353861c734a12854145fd9399b31f173a931e6cfdb529988dd06
➜  ~ docker checkpoint create --checkpoint-dir=/tmp looper cp1



Then I copy the /tmp/cp1 to the host 2.


*Host 2:*


➜  ~ docker create --name looper2 --security-opt seccomp:unconfined busybox
\
         /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep
1; done'
50d41c5580e4800b17b753c1ca8ecb011c142842002e467eb79111c4324e737e
➜  ~ docker start --checkpoint-dir=/tmp --checkpoint=cp1 looper2

Error response from daemon: oci runtime error: criu failed: type RESTORE
errno 0
log file: /tmp/cp1/criu.work/restore-2017-05-26T13:15:21-07:00/restore.log


Here's the* error log*


➜  ~ sudo tail /tmp/cp1/criu.work/restore-2017-05-26T13:15:21-07:00/
restore.log
(00.000427) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000430) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000433) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000436) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000438) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000442) cg: rewriting docker/d830494e8bca353861c734a1285414
5fd9399b31f173a931e6cfdb529988dd06 to /docker/50d41c5580e4800b17b753c1ca8ecb
011c142842002e467eb79111c4324e737e
(00.000446) cg: Preparing cgroups yard (cgroups restore mode 0x4)
(00.000489) cg: Opening .criu.cgyard.g3irYd as cg yard
(00.000517) cg:  Making controller dir .criu.cgyard.g3irYd/cpu,cpuacct
(cpu,cpuacct)
(00.000555) Error (criu/cgroup.c:1642): cg:  Can't mount controller dir
.criu.cgyard.g3irYd/cpu,cpuacct: Device or resource busy



TIA,
Krishna.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openvz.org/pipermail/criu/attachments/20170528/307e2813/attachment.html>