I was about to point out the Delegate= option if docker.service wants to
maintain its sub-cgroups by itself -- but it seems that already landed
upstream two days ago: https://github.com/jheiss/docker/commit/64b87f0
There have been plenty of discussions about that "who owns the cgroup
hiearchy"/"single writer" topic, and I don't think this will change
anytime soon (nor will we change the behaviour downstream), so I'll
close the systemd task.
I'll see to pulling this patch into Xenial's docker.
** Changed in: docker.io (Ubuntu)
Status: Confirmed => In Progress
** Changed in: systemd (Ubuntu)
Status: Confirmed => Won't Fix
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https://bugs.launchpad.net/bugs/1546214
Title:
Docker containers lose their cgroup after systemd reload
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