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Ciro Santilli OurBigBook.com
Asked: 2022-05-04 03:37:09 +0800 CST

How to run cgexec without sudo as current user on Ubuntu 22.04 with cgroups v2, failing with "cgroup change of group failed"?

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I've tried the procedures from:

but they don't work on Ubuntu 22.04, presumably because of the update to cgroups v2:

sudo cgcreate -a $USER:$USER -g memory:myGroup -t $USER:$USER
sudo cgset -r memory.max=500M myGroup
sudo cgset -r memory.swap.max=0 myGroup
cgexec -g memory:myGroup id

fails with:

cgroup change of group failed

It works if I run with sudo

sudo cgexec -g memory:myGroup id

but then the command runs as root, and I want it to run as the current user instead.

22.04

1 Answers

  1. To resolve it you need to boot your host system into CGroupV1 mode by modifying your kernel’s boot arguments to include: systemd.unified_cgroup_hierarchy=false

    sudo nano /etc/default/grub

GRUB_CMDLINE_LINUX="cgroup_enable=memory swapaccount=1 systemd.unified_cgroup_hierarchy=false"

sudo update-grub
sudo reboot
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