Description of problem:

munin-node lacks needed selinux rules for reading exim log files, preventing multiple bundled exim plugins from working.

Version-Release number of selected component (if applicable):

1.4.7-5.el6

How reproducible:

First: The entry in /etc/munin/plugin-conf.d/munin-node for exim uses the wrong group (mail) and does not have the required env variables.  (This is needed to discover the SELinux problem, thus why it's listed at the top here here and not as a separate bug)

This will work for a default setup:

[exim*]
group exim
env.logdir /var/log/exim
env.logname main.log
env.exim /usr/sbin/exim

Main problem:
The selinux rules for exim are missing, making it impossible for the bundled exim_mailstats and exim_mailqueue_alt to work.

If modelling the rules on sendmail_log_t, the rules should be:

allow munin_mail_plugin_t exim_log_t : file { ioctl read getattr lock open } ;
allow munin_mail_plugin_t exim_log_t : dir { getattr search open } ;

To reproduce SELinux problem:

Install exim, set "alternatives --config mta" to exim, and start exim.
Allow port 4949 through the firewall.
Install and configure munin-node.
ln -s /usr/share/munin/plugins/exim_mailstats /etc/munin/plugins/
/etc/init.d/munin-node restart

telnet to the node from a remote allowed host on port 4949:

# telnet myhost 4949
Trying 10.10.10.10...
Connected to myhost.mydomain.invalid (10.10.10.10).
Escape character is '^]'.
# munin node at myhost.mydomain.invalid
fetch exim_mailstats
# Bad exit
.
quit
Connection closed by foreign host.

Expected results:

# telnet myhost 4949
Trying 10.10.10.10...
Connected to myhost.mydomain.invalid (10.10.10.10).
Escape character is '^]'.
# munin node at myhost.mydomain.invalid
fetch exim_mailstats
received.value 216
completed.value 217
rejected.value 0
.
quit
Connection closed by foreign host.

If putting the above rules into place, it works.

This bug is also very hard to track down due to there being no messages logged in /var/log/audit/audit.log, even with "setenforce 0".  (Why?)