[Bug 1644996] [NEW] logrotate config uses syslog group

[Zsolt Ero]

Public bug reported:

The default logrotate config uses the "syslog" group.

> # use the syslog group by default, since this is the owning group
> # of /var/log/syslog.
> su root syslog

This is not correct anymore since 16.04, because:

1. "syslog" group doesn't exist on a stock Ubuntu 16.04 system, it only gets installed via rsyslog
2. The owning group is actually "adm".

This results in logrotate terminating with the following error during
cron.daily run:


run-parts -v /etc/cron.daily
run-parts: executing /etc/cron.daily/logrotate
error: /etc/logrotate.conf:7 unknown group 'syslog'

And can be fixed by changing syslog to adm group.

This is not present when rsyslog is installed, but only because that package creates the syslog group. This is a common bug in lighter environments, like Docker, where syslog-ng is a common choice instead of rsyslog, like in this issue: 
https://github.com/phusion/baseimage-docker/issues/338

** Affects: logrotate (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1644996

Title:
  logrotate config uses syslog group

Status in logrotate package in Ubuntu:
  New

Bug description:
  The default logrotate config uses the "syslog" group.

  > # use the syslog group by default, since this is the owning group
  > # of /var/log/syslog.
  > su root syslog

  This is not correct anymore since 16.04, because:

  1. "syslog" group doesn't exist on a stock Ubuntu 16.04 system, it only gets installed via rsyslog
  2. The owning group is actually "adm".

  This results in logrotate terminating with the following error during
  cron.daily run:

  
  run-parts -v /etc/cron.daily
  run-parts: executing /etc/cron.daily/logrotate
  error: /etc/logrotate.conf:7 unknown group 'syslog'

  And can be fixed by changing syslog to adm group.

  This is not present when rsyslog is installed, but only because that package creates the syslog group. This is a common bug in lighter environments, like Docker, where syslog-ng is a common choice instead of rsyslog, like in this issue: 
  https://github.com/phusion/baseimage-docker/issues/338

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