Does lxc support hybrid cgroup?

LXC
1

Is it possible run lxc containers on host with hybrid cgroup hierarchy ? Host config is cgroupv1 + memory V2 controller. System is Linux 4.9+ systemd 244, lxc 3.0.4 , available V2 controller are pid, io, memory.

Thanks
Mrinal

2

I don’t remember exactly what we have in 3.0.4.
We may have enough in there to allow a container to start though you won’t be able to configure resource limits on it.

lxc 3.2.1 should have the basics for resource limits but @brauner did a LOT of work on cgroup2 handling which will only be in lxc 4.0, so if you can afford to wait, it’s probably best.

3

We support hybrid only with the empty unified hierarchy, i.e. no controllers in the unified hierarchy. Mainly because systemd does it the same way.

4

btw, when it planned to release?

5

4.0 will be released before Ubuntu 20.04 comes out, so by the end of April, hopefully earlier.