After Icinga2 is all setup.

1. Install nagios via yum or apt get

     apt-get install nagios-plugins
   

   or

     yum install nagios-plugins-snmp.x86_64
   

2. Add the following /etc/icinga2/conf.d/services.conf

   apply Service "Check temperature " for (config in host.vars.temperature) {
    import "generic-temperature-check"      
    check_command = "check_temp"
    vars.hostname = config
    assign where host.vars.temperature
   }
   

3. Add the following to /etc/icinga2/conf.d/commands.conf

   object CheckCommand "check_temp" {
    import "plugin-check-command"
    command = [PluginDir + "/check_snmp"]
    arguments = {
    "-H" = "$hostname$"
    "-o" = "$temp_oid$"
    "-c" = "$temp_critical$"
    "-w" = "$temp_warning$"
    "-P" = "$temp_version$"
    "-C" = "$temp_community$"  
    }
    }
   

4. Edit the /etc/icinga2/conf.d/hosts.conf file to include the new host to monitor.

   object Host "environment.fqdn.com" {
    import "generic-temperature-check"
    address="10.0.2.2"
    vars.hostname="environment.fqdn.com"
    vars.temperature = "environment.fqdn.com"
    vars.temp_critical= ["90","90"]
    vars.temp_warning= ["80","80"]
    /* APC temp oid codes, these may need to be changed  */
    vars.temp_oid = ["1.3.6.1.4.1.318.1.1.10.3.13.1.1.3.1", "1.3.6.1.4.1.318.1.1.10.3.13.1.1.3.2"]
    vars.temp_version="1"
    vars.temp_community="communityName"
    vars.notification["mail"] = {
    groups = [ "icingaadmins" ] 
    }
   }