[CRIU] Configuration directory /etc/criu.d

[Dmitry Safonov]

2016-08-05 19:02 GMT+03:00 Adrian Reber <areber at redhat.com>:
>
> Having added the skip in-flight TCP connections option to TCP I thought
> something else is needed to influence CRIU's behavior. Every tool using
> CRIU (docker, lxc, runc, ...) hardcodes the required options into the
> source code and every change to CRIU requires a change in all tools.
>
> Therefore I thought it would be nice to have something like
>
> /etc/criu.d/ or ~/.criu.d/
>
> where CRIU would look for .conf files which can enable or disable
> options for all CRIU invocations.
>
> Staying at my skip in-flight TCP connections example I could just add a
> file to /etc/criu.d which always enables --skip-in-flight for CRIU
> invocations on that system. There should then also be a way to disable
> options from hardcoded CRIU invocations in higher tools like docker and
> lxc. I would also expect an option to ignore files in /etc/criu.d.
>
> https://github.com/xemul/criu/issues/194 is good example where it could
> also help.
>
> Is this something which would be useful to CRIU? Any other opinions?

In my point of view -- it's a nice idea.
I'm not a huge fan of scripts like that are being used in Virtuozzo
distributions
for suspending/resuming containers.
If we could like substitute scripts like that:
https://github.com/OpenVZ/libvzctl/blob/master/scripts/vz-cpt.in
With a simple .conf file -- It would be much tender to users, who need to change
some of CRIU options by any reason.
And each damn time I need to change them - I forget where those scripts lie

But maybe I'm too carping.

-- 
             Dmitry