OMD Labs with check_multi

check_multi is a plugin to run multiple checks under one service.

I use it very often so I’ve added it to the OMD Ansible role.

Let’s take for example the check_pve plugin to combine some checks.

omd_naemon_macros_hash:
  USER7: "test1234"

omd_naemon_commands_hash:
 check_multi:
  line: "$USER1$/check_multi -s HOSTADDRESS=$HOSTADDRESS$ -s HOSTNAME=$HOSTNAME$ -s USER7=$USER7$ -f /internal/etc/check_multi/$ARG1$ -r \"$ARG2$\""

omd_naemon_services_hash:
  check_pve_perf:
    hostgroup_name: 'proxmox'
    check_command: 'check_multi!check_pve_perf.cmd!1+2+8'


omd_naemon_check_multi_list:
  - name: check_pve_perf
    check_cpu:
      command: "$USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m cpu -n $HOSTNAME$ -w 70 -c 80"
    check_mem:
      command: "$USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m memory -n $HOSTNAME$ -w 110 -c 120"
    check_net_in:
      command: "$USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m net_in -n $HOSTNAME$ --timeframe hour --cf average -w 256000 -c 307200"
    check_net_out:
      command: "$USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m net_out -n $HOSTNAME$ --timeframe hour --cf average -w 256000 -c 307200"
    check_io_wait:
      command: "$USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m io_wait -n $HOSTNAME$ -w 4 -c 6"

This will give us following configuration.

###--- resource.cfg ---###
$USER1$=/omd/sites/test/lib/monitoring-plugins
$USER7$=test1234

###--- commands.cfg ---###
define command {
        command_name    check_multi
        command_line    $USER1$/check_multi -s HOSTADDRESS=$HOSTADDRESS$ -s HOSTNAME=$HOSTNAME$ -s USER1=$USER1$ -s USER7=$USER7$ -f /omd/sites/test/etc/check_multi/$ARG1$ -r "$ARG2$"
}

###--- services.cfg ---###
define service {
    hostgroup_name            proxmox
    service_description       check_pve_perf
    check_command             check_multi!check_pve_perf.cmd!1+2+8
    check_interval            5
    use                       generic-service-new-with-perf
}

It will also create the check_multi file.

###--- /omd/sites/test/etc/check_multi/check_pve_perf.cmd
command [check_net_in] = $USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m net_in -n $HOSTNAME$ --timeframe hour --cf average -w 256000 -c 307200
command [check_io_wait] = $USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m io_wait -n $HOSTNAME$ -w 4 -c 6
command [check_mem] = $USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m memory -n $HOSTNAME$ -w 110 -c 120
command [check_net_out] = $USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m net_out -n $HOSTNAME$ --timeframe hour --cf average -w 256000 -c 307200
command [check_cpu] = $USER1$/check_pve.rb -s $HOSTADDRESS$ -u monitoring@pve -p $USER7$ -m cpu -n $HOSTNAME$ -w 70 -c 80

That’s all to start with check_multi.