Clustering and High-Availability

Check Corosync Rings

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Description:

Checks the status of Corosync Ring(s).

Current Version

0.2

Last Release Date

2011-01-05

Compatible With

  • Nagios 3.x

Owner

Phil Garner

Website

http://www.sysnix.com

License

GPL

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Project Files
FileDescription
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
Reviews (2) Add a Review
problem
by sampinar, October 31, 2011
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

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Sweet and simple
by davebean, January 31, 2011
Checking corosync ring status is essential in any Pacemaker cluster and this plugin just does what it says on th lid - thanks Phil!
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