Public bug reported:
Even though Ubuntu 22.04 is definitely using cgroup2:
cgroup2 on /sys/fs/cgroup/unified type cgroup2
(rw,nosuid,nodev,noexec,relatime,nsdelegate)
systemd appears to be using cgroup:
cgroup on /sys/fs/cgroup/systemd type cgroup
(rw,nosuid,nodev,noexec,relatime,xattr,name=systemd)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup
(rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/blkio type cgroup
(rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/cpuset type cgroup
(rw,nosuid,nodev,noexec,relatime,cpuset)
cgroup on /sys/fs/cgroup/memory type cgroup
(rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/freezer type cgroup
(rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/hugetlb type cgroup
(rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/devices type cgroup
(rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/rdma type cgroup (rw,nosuid,nodev,noexec,relatime,rdma)
cgroup on /sys/fs/cgroup/perf_event type cgroup
(rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup
(rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/misc type cgroup (rw,nosuid,nodev,noexec,relatime,misc)
When starting a container using default configuration from `systemd-nspawn@`
unit it automatically selects cgroupv1 for some reason:
systemd-nspawn@debian-sid.service - Container debian-sid
Loaded: loaded (/lib/systemd/system/systemd-nspawn@.service; disabled;
vendor preset: enabled)
Active: active (running) since Sat 2024-07-20 00:48:30 +07; 1s ago
Docs: man:systemd-nspawn(1)
Main PID: 5210 (systemd-nspawn)
Status: "Container running."
Tasks: 2 (limit: 16384)
Memory: 2.7M
CGroup: /machine.slice/systemd-nspawn@debian-sid.service
├─payload
│ └─5214 /usr/lib/systemd/systemd
└─supervisor
└─5210 systemd-nspawn --quiet --keep-unit --boot
--link-journal=try-guest --network-veth -U --settings=override --ma>
ก.ค. 20 00:48:30 ubuntu-dev systemd[1]: Starting Container debian-sid...
ก.ค. 20 00:48:30 ubuntu-dev systemd[1]: Started Container debian-sid.
ก.ค. 20 00:48:30 ubuntu-dev systemd-nspawn[5210]: Legacy cgroup v1 support
selected. This is no longer supported ...
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: systemd-container 249.11-0ubuntu3.12
ProcVersionSignature: Ubuntu 6.5.0-44.44~22.04.1-generic 6.5.13
Uname: Linux 6.5.0-44-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.5
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 20 00:43:45 2024
InstallationDate: Installed on 2024-07-19 (0 days ago)
InstallationMedia: Ubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64
(20240220)
SourcePackage: systemd
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug jammy wayland-session
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https://bugs.launchpad.net/bugs/2073625
Title:
systemd-nspawn uses cgroupv1
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