nagios-check-redis

Simple plugin for nagios to check status or memory usage of a redis server.

Prerequisites

• NodeJS
• Nagios
• NRPE (optional)

Installing

To download the latest version:

npm install -g nagios-redis

Usage

# check ping
check_redis -H localhost -p 6379 -t ping

# check memory
check_redis -H localhost -p 6379 -t memory -w 1GB -c 2GB

check_redis --help

Note on units: when memory size is needed, it is possible to specify it in the usual form of 1k 5GB 4M and so forth.

Edit your commands.cfg and add the following:

define command {
    command_name    check_redis_ping
    command_line    $USER1$/nagios-redis/check_redis.js -H $HOSTADDRESS$ -p $ARG1$ -t ping
}

define command {
    command_name    check_redis_memory
    command_line    $USER1$/nagios-redis/check_redis.js -H $HOSTADDRESS$ -p $ARG1$ -t memory -w $ARG2$ -c $ARG3$
}

Now you can monitor redis servers by adding:

define service {
    use                 	generic-service
    hostgroup_name          Redis servers
    service_description     Redis ping
    check_command           check_redis_ping!6379
}

define service {
    use                 	generic-service
    hostgroup_name          Redis servers
    service_description     Redis memory
    check_command           check_redis_memory!6379!1GB!2GB
}

Usage monitoring remote host with NRPE

Add the command to your NRPE configuration on your remote host:

command[check_redis_ping]=check_redis -t ping
command[check_redis_memory]=check_redis -t memory -w 2GB -c 3GB

Monitor the service on your Nagios host:

define service{
		use                             generic-service
		host_name                       your host
		service_description             Redis ping
		check_command                   check_nrpe!check_redis_ping
		servicegroups					redis
}

define service{
		use                             generic-service
		host_name                       your host
		service_description             Redis memory
		check_command                   check_nrpe!check_redis_memory
		servicegroups					redis
}

P.S. We could provide the arguments from Nagios to the NRPE configuration (with nrpe dont_blame_nrpe set to true) but this is quicker and easier to manage.

License

nope :)