[CRIU] Diagnosing Parasite Dumping Failure Error

[Adrian Reber]

On Tue, Jun 28, 2022 at 02:32:27PM +0000, Kharbanda, Shreyas wrote:
> I have been trying to setup CRIU v3.13 inside a privileged docker container (A dockerized CRIU Image is bundled as part of the Dockerfile on an Alpine Linux Base) to checkpoint a certain process. The containers run inside a Kubernetes cluster on a fresh install of Ubuntu 20.04 LTS.
> 
> I have done some sanity checks, namely running the `criu check` command from within the container. Apart from `criu check`, I have checked for various privilege accesses and all come back positive.
> 
> The `criu check` command returns the following:
> 
> Error (criu/util.c:610): exited, status=1
> Error (criu/util.c:610): exited, status=1
> Warn  (criu/kerndat.c:839): Can't keep kdat cache on non-tempfs
> Looks good.
> 
> I am currently trying to get the `simple loop` example (https://criu.org/Simple_loop) working. After following the instructions, I see that dumping the process fails with error code -1.
> 
> I have attached the verbose log along with this email for additional details.
> 
> I haven’t had much success in finding a solution to the problem in the GitHub issues, and I’d really appreciate it if you could point me in the right direction.

Interesting error message:

pie: 52: Warn  (criu/pie/parasite.c:648): /proc/self/cgroup was bigger than the page size 

Please open a github issue and maybe also post the content of
'/proc/self/cgroup'. The mailing list is unfortunately not very active
any more.

		Adrian