Docker not running after updating to UCS 4.4-3

Hi,

on all systems the docker daemon wasn’t running after updating to UCS 4.4-3. Look like it was stopped during update but not started again after updating:

● docker.service - Docker Application Container Engine
   Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
  Drop-In: /etc/systemd/system/docker.service.d
           └─http-proxy.conf
   Active: inactive (dead) since Tue 2019-12-03 16:53:49 CET; 10min ago
     Docs: https://docs.docker.com
 Main PID: 4992 (code=exited, status=0/SUCCESS)
      CPU: 8min 10.523s

Dez 03 16:53:49 opsi systemd[1]: Stopping Docker Application Container Engine...
Dez 03 16:53:49 opsi dockerd[4992]: time="2019-12-03T16:53:49.338642668+01:00" level=info msg="Processing signal 'terminated'"
Dez 03 16:53:49 opsi dockerd[4992]: time="2019-12-03T16:53:49.879289982+01:00" level=info msg="stopping event stream following graceful shutdown" error="context canceled" module=libcontainerd namespace=moby
Dez 03 16:53:49 opsi dockerd[4992]: time="2019-12-03T16:53:49.879310000+01:00" level=info msg="stopping event stream following graceful shutdown" error="context canceled" module=libcontainerd namespace=plugins.moby
Dez 03 16:53:49 opsi systemd[1]: Stopped Docker Application Container Engine.

So I’ve started docker manually again:

systemctl start docker

Cheers,
SirTux

Restarting the docker service is the correct workaround. The issue was that a check in our pre-update script was not removed from the previous update to UCS 4.4-2. We just pushed a fix to our update server.
https://forge.univention.org/bugzilla/show_bug.cgi?id=50586