This bug appears to have been fixed in 8.32.0-1ubuntu4. Looks like this was an issue with the Apparmor profile.
rsyslog (8.32.0-1ubuntu4) bionic; urgency=medium [ Jamie Strandboge ] * debian/usr.sbin.rsyslogd: updates for bionic (LP: #1766600) - allow rsyslog modules in multiarch directories - allow writing temporary pidfile [ Dimitri John Ledkov ] * Tolerate installing rsyslog, on systems without systemd installed. LP: #1766574 -- Dimitri John Ledkov <x...@ubuntu.com> Tue, 24 Apr 2018 15:47:41 +0100 If anyone is still seeing this issue, please re-open. ** Changed in: rsyslog (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766317 Title: package rsyslog 8.32.0-1ubuntu3 failed to install/upgrade: installed rsyslog package post-installation script subprocess returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/rsyslog/+bug/1766317/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs