ervice States in Icinga2

• 0 UP OK : WORKING WELL
• 1 UP WARNING : MIGHT LIGHT MIGHT BE OUT, BUT I WORK!
• 2 DOWN CRITICAL : I AM GOING DOWN!
• 3 DOWN UNKNOW : COULD NOT DETERMINE STATUS

Host and Service Checks

The state is determined by running checks in regular intervals

object Host "router" {
  check_command = "hostalive"
  address = "10.0.0.1"
}

hostalive

• Built in
• sends ICMP echo requests to the IP in address
• hostalive is same as ping except default thresholds
• for faster ICMP checks look into icmp checkCommand

Host check alternatives

If host is not reachable with icmp, one can use dummy state to set a default state.

object Host "dummy-host" {
  check_command = "dummy"
  vars.dummy_state = 0 // refer to table above for what it means uWu
  vars.dummy_text = "All is well!"
}

Templates

• used for applying a set of identical attributes to more than one object

template Service "generic-service" {
  max_check_attempts = 3
  check_interval = 5m
  retry_interval = 1m
  enable_perfdata = true
}

apply Service "ping4" {
  import "generic-service"
  check_command = "ping4"
  assign where host.address
}

apply Service "ping6" {
  import "generic-service"
  check_command = "ping6"
  assign where host.address6
}

Note : Templates and Objects share same namespace, you can’t define a template that has the same name like an object.