Created a new Nagios plugin which checks the status of Corosync rings.

Checks the number of Corosync rings running and their status. Only runs on local host so I suggest you use NRPE if nagios isn't local.

With -r option can specify the expected number of rings although this is optional and not required.

If corosync isn't installed in /usr/sbin or sudo in /usr/bin then script will need editing see comments in script.

NOTE:- Requires Perl 5.8 or higher & the Perl Module Nagios::Plugin.

Nagios user will need sudo access - suggest adding line below to sudoers

nagios ALL=(ALL) NOPASSWD: /usr/sbin/corosync-cfgtool -s

In sudoers if requiretty is on (off state is default) you will also need to add the line below

Defaults:nagios !requiretty 

Download it from Nagios Exchange