Bug 700726

Summary:	app-emulation/docker-18.09.9: require systemd with cgroup-hybrid
Product:	Gentoo Linux	Reporter:	Alexey Vladykin <vladykin>
Component:	Current packages	Assignee:	William Hubbs <williamh>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	mrueg, zlogene
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---

Description Alexey Vladykin 2019-11-19 21:37:59 UTC

I had a problem with app-emulation/docker-18.09.9 failing to start under sys-apps/systemd-243-r2. Errors in docker log were:

  level=warning msg="Your kernel does not support cgroup memory limit"
  level=warning msg="Unable to find cpu cgroup in mounts"
  level=warning msg="Unable to find blkio cgroup in mounts"
  level=warning msg="Unable to find cpuset cgroup in mounts"
  level=warning msg="mountpoint for pids not found"
  Error starting daemon: Devices cgroup isn't mounted

It took me a while to find the solution, which is to enable cgroup-hybrid use flag of sys-apps/systemd. This solution is documented in https://wiki.gentoo.org/wiki/Docker, but it's really hard to find: wiki does not cite exact error message, so it's does not appear among results when googling for the error message.

Is it possible to make docker ebuild require cgroup-hybrid use flag on systemd so that portage could enforce it automatically and users don't have to figure this out themselves after facing docker startup errors?

I see in https://bugs.gentoo.org/699442 that app-emulation/libvirt already has such check.

Comment 1 Mikle Kolyada (RETIRED) archtester

2020-01-16 10:46:53 UTC


*** This bug has been marked as a duplicate of bug 691844 ***