Fedora Infrastructure Nagios
noc01, noc02, noc01.stg, batcave01
This SOP is to describe nagios configurations
Fedora Project runs two nagios instances, nagios (noc01) https://admin.fedoraproject.org/nagios and nagios-external (noc02) https://nagios-external.fedoraproject.org/nagios, you must be in the 'sysadmin' group to access them.
Apart from the two production instances, we are currently running a staging instance for testing-purposes available through SSH at noc01.stg.
- nagios (noc01)
The nagios configuration on noc01 should only monitor general host statistics ansible status, uptime, apache status (up/down), SSH etc. + The configurations are found in nagios ansible roles:
- nagios-external (noc02)
The nagios configuration on noc02 is located outside of our main datacenter and should monitor our user websites/applications (fedoraproject.org, FAS, PackageDB, Bodhi/Updates). + The configurations are found in nagios ansible roles:
Production and staging instances through SSH: Please make sure you are into 'sysadmin' and 'sysadmin-noc' FAS groups before trying to access these hosts.
See SSH Access SOP
We are currently using NRPE to execute remote Nagios plugins on any host of our network.
A great guide about it and its usage mixed up with some nice images about its structure can be found at: https://assets.nagios.com/downloads/nagioscore/docs/nrpe/NRPE.pdf
Nagios notifications are generally easy to read, and follow this consistent format:
** PROBLEM/ACKNOWLEDGEMENT/RECOVERY alert - hostname/Check is WARNING/CRITICAL/OK ** ** HOST DOWN/UP alert - hostname **
Reading the message will provide extra information on what is wrong.
Disk space warnings normally include the following information:
DISK WARNING/CRITICAL/OK - free space: mountpoint freespace(MB) (freespace(%) inode=freeinodes(%)):
A message stating "(1% inode=99%)" means that the diskspace is critical not the inode usage and is a sign that more diskspace is required.