Hello all, here comes news from the docker package. I can confirm, if ever there was a need, that docker 19.03 does not work with `systemd.unified_cgroup_hierarchy=true`.
$ dpkg -l | grep docker ii docker.io 19.03.13+dfsg3-2 amd64 Linux container runtime $ findmnt /sys/fs/cgroup TARGET SOURCE FSTYPE OPTIONS /sys/fs/cgroup cgroup2 cgroup2 rw,nosuid,nodev,noexec,relatime,nsdelegate $ systemctl is-active docker active $ sudo docker run --rm -it debian docker: Error response from daemon: cgroups: cgroup mountpoint does not exist: unknown. Docker will support cgroupv2 in the upcoming `20.10` version. They released a rc1 a few days ago: - <https://github.com/moby/moby/releases/tag/v20.10.0-rc1> I packaged this version and I just uploaded it to experimental: - <https://salsa.debian.org/docker-team/docker/-/tree/experimental> - < https://buildd.debian.org/status/package.php?p=docker.io&suite=experimental> I can confirm with a quick test that it seems to work: $ dpkg -l | grep docker ii docker.io 20.10.0~rc1+dfsg1-1 amd64 Linux container runtime $ sudo docker run --rm -it debian echo 'hello world' hello world Please note that the package I uploaded to experimental is a work in progress. Please give it a try and report issues. Whether Docker upstream will release a "stable" version in time for Debian Bullseye is another question. Wait and see. Cheers, Arnaud
