Bug#943981: Proposal: Switch to cgroupv2 by default

[Michael Biebl]

Am 21.04.20 um 15:40 schrieb Ryutaroh Matsumoto:
> My guess is that /var/lib/lxc/autopkgtest-sid/config needs
> lxc.init.cmd = /sbin/init systemd.unified_cgroup_hierarchy=1

Indeed. While I updated /etc/lxc/default.conf, it seems
"autopkgtest-build-lxc debian sid" did not update the existing
/var/lib/lxc/autopkgtest-sid/config.
Once I destroyed the container and created it anew, it worked.

It's a bit unfortunate, that when you boot your system with the unified
hierarchy, you need to explicitly configure
"lxc.init.cmd = /sbin/init systemd.unified_cgroup_hierarchy=1" or hope
the host systemd instance has been built with unified hierarchy as default.
That means, once we flip the default in unstable/testing, creating and
running a buster container will require
"lxc.init.cmd = /sbin/init systemd.unified_cgroup_hierarchy=1"
Would be nice if lxc could do that automatically.

Or is there maybe a while to update lxc-templates to influence that?

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