There is an error in the munin plugin for mailman:
The "logfile" path is wrong:
/var/log/mailman/post # Wrong
/var/lib/mailman/logs/post # Right
Steps to Reproduce:
1. Install munin & mailman
2. Set-up the mailman plugin
3. Run "munin-run mailman"
Can't open /var/log/mailman/post.0 for reading: No such file or directory at /etc/munin/plugins/mailman line 109.
Lovely, it's not configurable...
I got to fix this upstream but it worries me because it does not include an explicit license, which is not good.
Although I could probably argue that mailman is misconfigured by default if it saves logs in /var/lib — nevertheless this is a bug that has to be fixed, will try something.
Okay this should be solved in 2.0.9-r1.
The paths are now configurable, and I changed the default configuration file to point to Gentoo's default for mailman.
It works now, thanks!