Package: docker.io
Version: 1.11.2~ds1-6
Severity: normal

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When booting with the systemd.unified_cgroup_hierarchy kernel parameter,
systemd mounts the cgroup2 filesystem at /sys/fs/cgroup. As a result,
docker no longer starts:

time="2016-10-13T11:40:35.542974438+01:00" level=info msg="New containerd 
process, pid: 5361\n"
time="2016-10-13T11:40:36.560787581+01:00" level=info msg="[graphdriver] using 
prior storage driver \"overlay\""
time="2016-10-13T11:40:36.589298060+01:00" level=info msg="Graph migration to 
content-addressability took 0.00 seconds"
time="2016-10-13T11:40:36.641136232+01:00" level=info msg="Firewalld running: 
false"
time="2016-10-13T11:40:36.769321694+01:00" level=info msg="Default bridge 
(docker0) is assigned with an IP address 172.17.0.0/16. Daemon option --bip can 
be used to set a preferred IP address"
time="2016-10-13T11:40:36.930907456+01:00" level=warning msg="Your kernel does 
not support cgroup memory limit"
time="2016-10-13T11:40:36.930946129+01:00" level=warning msg="Unable to find 
cpu cgroup in mounts"
time="2016-10-13T11:40:36.930958093+01:00" level=warning msg="Unable to find 
blkio cgroup in mounts"
time="2016-10-13T11:40:36.930967804+01:00" level=warning msg="Unable to find 
cpuset cgroup in mounts"
time="2016-10-13T11:40:36.933815046+01:00" level=warning msg="mountpoint for 
pids not found"
time="2016-10-13T11:40:36.934330952+01:00" level=fatal msg="Error starting 
daemon: Devices cgroup isn't mounted"

- -- System Information:
Debian Release: stretch/sid
  APT prefers testing-debug
  APT policy: (550, 'testing-debug'), (550, 'testing'), (520, 
'unstable-debug'), (520, 'unstable'), (510, 'experimental-debug'), (510, 
'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.7.0-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

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