Monitor the UCS Mail Server with Nagios

UCS - Univention Corporate Server
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1

How do we go about monitoring the UCS Mail Server services on Nagios?

We already have the Service SMTP2 being monitored, however we would like to monitor IMAP & POP3 services as well. So we can be alerted if either service SMTP or IMAP/POP3 services stop or are being heavily loaded.

Thanks.

2

There is a section in the manual on Nagios: http://docs.software-univention.de/manual-4.2.html#nagios::general

You can go to the Nagios UMC module and add a service entry.

For IMAP that’d be:
Name=IMAP
Plugin command=check_imap
Plugin command arguments=-p 143
Use NRPE=yes
Click Tab “Hosts” → add the host(s) to check.

For IMAPS it’s a bit more complicated, because there currently seems to be a problem with a parser.

Name=IMAPS
Plugin command=check_imap
Plugin command arguments=-S' '-p 993
Use NRPE=yes
Click Tab “Hosts” → add the host(s) to check.

Then restart Nagios:
systemctl restart nagios3.service

The new service checks should now be shown in the Nagios “Service Detail” view.

Use /usr/lib/nagios/plugins/check_imap --help if you need further options.

For POP3 do the same as for IMAP.

Greetings
Daniel Tröder