incorrect permissions on /var/log after debootstrap

Bug #1811861 reported by Frederic Van Espen on 2019-01-15
This bug affects 1 person
Affects Status Importance Assigned to Milestone
rsyslog (Ubuntu)

Bug Description

we are debootstrapping a full bionic distribution into a directory. After debootstrapping the permissions on /var/log are incorrect, causing rsyslog to fail because it cannot write into the directory to create the various files.

Also, in the postinst of the rsyslog package I see that systemd-tmpfiles is attempted to be used to create the files defined in /usr/lib/tmpfiles.d/00rsyslog.conf, but from what I can tell this will never work because of the systemd-tmpfiles manpage:
           If this option is passed, all files and directories marked with f, F, w, d, D, v, p, L, c, b, m in the configuration files are
           created or written to. Files and directories marked with z, Z, t, T, a, and A have their ownership, access mode and security
           labels set.

Since the files are configured with type "z" only ownership, access mode and security will be updated.

# lsb_release -rd
Description: Ubuntu 18.04.1 LTS
Release: 18.04

# apt-cache policy rsyslog
  Installed: 8.32.0-1ubuntu4
  Candidate: 8.32.0-1ubuntu4
  Version table:
 *** 8.32.0-1ubuntu4 100
        100 /var/lib/dpkg/status

Actually, it looks like this is already fixed in cosmic. Can this be ported to bionic as well?

Sorry for the noise, it seems this is not related to rsyslog after all. In our install process we are moving /var/log to another partition (mounted in /data/) and then symlink it to /var/log. Permissions are set up properly and work while the system is running. When the system is rebooted though there is an unknown process changing the permissions of /data/log, my best guess something related to systemd.

When we bind mount /data/log in /var/log directory we don't have this issue though.

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