How to setup check_megaraid_sas
1. Make sure you have Megacli installed. In HPC it's installed in /opt/MegaRAID/MegaCli/
2. Download check_megaraid_sas script from Nagios Exchange to the plugins folder of the host. In most systems this is in /usr/lib64/nagios/plugins or /usr/lib/nagios/plugins
3. The MegaCli script has to be run as root, usually nrpe runs as user nrpe. The nagios check script is fully aware of that and uses sudo to call the raid check script. So nrpe needs to be allowed to call this script as root. Use visudo and add this line:
nrpe ALL=(ALL) NOPASSWD: /opt/MegaRAID/MegaCli
OPTION 2 TODO: (check hpc's /etc/sudoers)
nrpe ALL = NOPASSWD: RAIDSTATUSNRPE
4. Add a new command definition to nrpe config : /etc/nagios/nrpe.cfg
command[check_raid]=/usr/lib64/nagios/plugins/check_megaraid_sas
5. On the monitoring server, add a service definition as follows:
define service{
use generic-service
host_name HPC
service_description Check RAID Status
check_command check_nrpe_1arg!check_raid
}
6. Restart Nagios