unsupporting for CGroup version v2 or maybe higher

[timcfliu]

Feedback

I started as fresh installation according to the installation guide this summer and I was being prompted about the "unsupported system - CGroup version"
I further checked the docker system info and found the version I have is version 2, which came with the installment of docker ce version.

Can you help to fix this false prompt? Thanks!

URL

https://www.home-assistant.io/more-info/unsupported/cgroup_version/

Version

2023.10.0

Additional information

root@XXXXX:~# docker system info
Client: Docker Engine - Community
Version: 24.0.6
Context: default
Debug Mode: false
Plugins:
buildx: Docker Buildx (Docker Inc.)
Version: v0.11.2
Path: /usr/libexec/docker/cli-plugins/docker-buildx
compose: Docker Compose (Docker Inc.)
Version: v2.21.0
Path: /usr/libexec/docker/cli-plugins/docker-compose

Server:
Containers: 17
Running: 16
Paused: 0
Stopped: 1
Images: 18
Server Version: 24.0.6
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: journald
Cgroup Driver: systemd
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 61f9fd88f79f081d64d6fa3bb1a0dc71ec870523
runc version: v1.1.9-0-gccaecfc
init version: de40ad0
Security Options:
apparmor
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.1.0-12-arm64
Operating System: Debian GNU/Linux 12 (bookworm)
OSType: linux
Architecture: aarch64
CPUs: 4
Total Memory: 3.699GiB
Name: rpi4-20230612
ID: c8df9f4c-407e-4faa-b6a4-9277542f3fa5
Docker Root Dir: /var/lib/docker
Debug Mode: false
Experimental: true
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false

[frenck]

Hi there @timcfliu 👋

It seems like you want to report an issue with the Home Assistant Supervisor; however, you have submitted documentation feedback instead.

Please report issues with the supervisor here:

https://github.com/home-assistant/supervisor/issues

Thanks 👍

../Frenck

[hellbringer]

The message "System is unsupported because the wrong version of Docker CGroup is in use. Use the link to learn the correct version and how to fix this." Learn more links here.: https://www.home-assistant.io/more-info/unsupported/cgroup_version
Feedback on that article links here: https://github.com/home-assistant/home-assistant.github.io/issues/new?template=feedback.yml&url=https%3A%2F%2Fwww.home-assistant.io%2Fmore-info%2Funsupported%2Fcgroup_version%2F&version=2023.10.1&labels=current

systemd has switched to CGroup2 "systemd now defaults to the "unified" cgroup hierarchy (i.e. cgroupv2). This change reflects the fact that cgroups2 support has matured substantially in both systemd and in the kernel."
I followed this guide on a new installation: https://github.com/home-assistant/supervised-installer
and got the CGroup v2
So the statement "you will need to revert what you did" is incorrect.

The documentation a extra "check": "Please make sure you use CGroup v1 to check for this:

This is CGroup v2 (incorrect, default):
mount -l|grep cgroup2
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate,memory_recursiveprot)

This is CGroup v1 (correct):
mount -l|grep cgroup2
cgroup2 on /sys/fs/cgroup/unified type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)

To fix this on ArmBian 23 bookworm:
add this line to /boot/armbianEnv.txt
extraargs=systemd.unified_cgroup_hierarchy=0

In GRUB:
sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
or change/add in /boot/grub/grub.cfg or /etc/default/grub
GRUB_CMDLINE_LINUX="systemd.unified_cgroup_hierarchy=0"

See also:
https://forum.armbian.com/topic/21129-pull-request-bootenvrockchip-force-cgroup-v1-usage/
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985446

[frenck]

Cool, but as per above.. this is not the right place....