I was reading a blog post on Percona Monitoring Plugins and how you can somehow monitor a Galera cluster using pmp-check-mysql-status plugin. Below is the link to the blog demonstrating that:
The commands in this tutorial are run on the command line. I wish to try these commands in a Nagios .cfg file e.g, monitor.cfg. How do i write the services for the commands used in this tutorial?
This was my attempt and i cannot figure out what the best parameters to use for check_command on the service. I am suspecting that where the problem is.
So inside my /etc/nagios3/conf.d/monitor.cfg file, i have the following:
define host{
use generic-host
host_name percona-server
alias percona
address 127.0.0.1
}
## Check for a Primary Cluster
define command{
command_name check_mysql_status
command_line /usr/lib/nagios/plugins/pmp-check-
mysql-status -x wsrep_cluster_status -C == -T str -c non-Primary
}
define service{
use generic-service
hostgroup_name mysql-servers
service_description Cluster
check_command pmp-check-mysql-
status!wsrep_cluster_status!==!str!non-Primary
}
When i run the command Nagios and go to monitor it, i get this message in the Nagios dashboard:
status: UNKNOWN; /usr/lib/nagios/plugins/pmp-check-mysql-status: 31:
shift: can't shift that many
You verified that:
/usr/lib/nagios/plugins/pmp-check-mysql-status -x wsrep_cluster_status -C == -T str -c non-Primary
works fine on command line on the target host? I suspect there's a shell escape issue with the ==
Does this work well for you? /usr/lib64/nagios/plugins/pmp-check-mysql-status -x wsrep_flow_control_paused -w 0.1 -c 0.9