homingli / nagios-plugin-docker

nagios plugin for docker (prototype)

Nagios plugin for Docker

• prototype - not useful with current implementation
• uses image count as "performance data", with levels indicated as DATA_WARN|CRIT|MIN|MAX

Installation in Ubuntu 13.10 (saucy):

Assumptions:

• have nagios3 properly installed (with the defaults)
• have docker properly installed (with the defaults)

Modify docker startup to also listen for tcp connection:

# cat /etc/init/docker.conf 
description     "Run docker"

start on filesystem or runlevel [2345]
stop on runlevel [!2345]

respawn

script
    /usr/bin/docker -H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock -d
end script

As root:

# cp {,/etc/nagios-plugins/config/}docker.cfg
# cp {,/usr/lib/nagios/plugins/}check_docker

Add service to localhost nagios config:

define service {
        use                             generic-service
        host_name                       localhost
        service_description             Custom Docker Checker In Bash
        check_command                   check_docker
}

or

# cp {,/etc/nagios3/conf.d/}localhost_nagios2.cfg

Restart nagios3

# service nagios3 restart

Authored by Ho Ming Li @HoReaL