Bug#981101: cgroup is not mounted
shan.bharani at gmail.com
shan.bharani at gmail.com
Tue Jan 26 13:29:26 GMT 2021
Hi Michael,
I too have filed bug with lxc maintainers.
I did try to change unified to false in a Virtual Machine in Gnome
Boxes to test(*), however systemd reports only unified after change. (
output of systemd --version). I will try change it in host if it works
fine with VM.
I also did fresh installs in VM to test systemd and lxc it never
worked. However systemd and lxc works for earlier versions.(
Bullseye/Sid Kernel 5.9 )
Will wait for updates from lxc team if any.
(*)(i) Updated the grub file with
GRUB_CMDLINE_LINUX="systemd.unified_cgroup_hierarchy=false"
(ii) ran update-grub
(iii) reboot
(iv) systemd --version
Regards,
Bharani
On Tue, 2021-01-26 at 13:57 +0100, Michael Biebl wrote:
> Am 26.01.21 um 13:53 schrieb shan.bharani at gmail.com:
> > Hi Michael,
> >
> > Shouldn't "/sys/fs/cgroup/unified" be mounted by systemd to be used
> > lxc
> > to use cgroupv2?
> >
> > Should we need to do "mount -t tmpfs cgroup /sys/fs/cgroup" for
> > cgroupv2 as well? Will it be done systemd ?
> >
> > In cgroupv1, it is usually seen "/sys/fs/cgroup" mounted on tmpfs.
> > In
> > case of cgroupv2 unified, nothing like that is seen.
> >
> >
> > df -h
> > Filesystem Size Used Avail Use% Mounted on
> > udev 3.4G 0 3.4G 0% /dev
> > tmpfs 692M 1.7M 691M 1% /run
> > /dev/sda8 125G 57G 62G 48% /
> > tmpfs 3.4G 0 3.4G 0% /dev/shm
> > tmpfs 5.0M 4.0K 5.0M 1% /run/lock
> > /dev/sda1 96M 62M 35M 65% /boot/efi
> > tmpfs 692M 212K 692M 1% /run/user/1000
> >
> >
> >
> > Please note that lxc and lxcfs is malfunctioning for fresh installs
> > (Linux coffee 5.10.0-1-amd64 #1 SMP Debian 5.10.4-1 (2020-12-31)
> > x86_64
> > GNU/Linux) as well. Not sure which package is having problem. But
> > its(lxc) not working.
>
> I can not confirm that.
> lxc is working fine here ootb with cgroupv2.
> No changes necessary, no manual mounts or anything.
>
> The only known issue I'm aware of, is if you want to run jessie
> containers on a bullseye/sid host.
> Since jessie's systemd does not yet support cgroupv2, you need to
> switch
> the host back to unified if you want to use such containers.
>
> Maybe you have some custom config, which breaks lxc. The lxc
> maintainers
> will be in a better situation to help you debug that.
>
> Regards,
> Michael
>
>
>
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