Check Corosync Rings

Description

Checks the status of Corosync Ring(s).

Project Details

Current Version

0.2

Last Release Date

2011-01-05

Owner

Phil Garner

Website

http://www.sysnix.com

License

GPL

Compatible With

Nagios 3.x

Project Files

File	Description
check_corosync_rings_v0_2	Check Corosync Rings Perl script

Project Notes

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

Version History
v0.1 05/01/2011
v0.2 31/10/2011 - additional crit when closing the file handle and additional comments added

User Reviews (2)

October 31, 2011

problem

by: sampinar

Dave, any ideas?

When I run it via command line, works like a charm:

[root@localhost ~]# ./check_corosync_rings
check_cororings OK - ring 0 OK

nrpe is running on client as "nrpe" user:

[root@localhost ~]# grep ^nrpe_user /etc/nagios/nrpe.cfg
nrpe_user=nrpe

I put: nrpe ALL=(ALL) NOPASSWD: /usr/sbin/corosync-cfgtool -s

both in nrpe.cfg file and sudoers file.

I can run command with nrpe user:

[root@localhost ~]# su - nrpe
-sh-3.2$ /usr/bin/sudo /usr/sbin/corosync-cfgtool -s
Printing ring status.
Local node ID -1425773046
RING ID 0
id = 10.110.4.171
status = ring 0 active with no faults

When I run via check_nrpe from nagios server, I get:

[root@nagios ~]# /usr/local/groundwork/nagios/libexec/check_nrpe -H cl1 -c check_coro_rings
check_cororings CRITICAL - No Rings Found

Any ideas? I'm at wits. Can't think of what else to look at.

Thanks.

Owner's Reply:

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

January 31, 2011

Sweet and simple

by: davebean

Checking corosync ring status is essential in any Pacemaker cluster and this plugin just does what it says on th lid - thanks Phil!