Assign variable value from host instance to variable in service instance

Icinga 2
1

Hello!
I defined my own check command

object CheckCommand "check_fortiwlc_ap" {
  import "plugin-check-command"

  command = [
     "/opt/monitoring/icinga/check_fortiwlc_ap.py",
    "-l", "$username$",
    "--url", "$url$",
    "-p", "$password$",
    "--ap", "$ap$",



  ]
}

For 1000 devices I would like defined only one service object:

apply Service "check_fortiwlc_ap" {
    import "generic-service"
    check_command = "check_fortiwlc_ap"
    vars.ap=host.address???
    vars.password = "test"
    vars.url = host.vars.wlc ???
    vars.username = "rest_api"
    assign where vars.function_v  == "access_point""
}

For every device I define host object:

object Host "{{ fqdn }}" {
    address = "{{ host_address }}"
    check_command = "hostalive"
    {% if my_group is defined and my_group %}
        vars.host_groups = [{{ my_group|join(' ,')  }}]
    {% endif %}

    {% if json.status is defined and json.status %}
        vars.status = "{{ json.status }}"
    {% endif %}

    {% if json.managed is defined and json.managed %}
        vars.managed = "{{ json.managed }}"
    {% endif %}

    {% if json.platform is defined and json.platform %}
        vars.platform = "{{ json.platform }}"
    {% endif %}

    {% if json.roles is defined and json.roles %}
        vars.roles = "{{ json.roles }}"
    {% endif %}

    {% if json.mac_address is defined and json.mac_address %}
        vars.mac_address = "{{ json.mac_address }}"
    {% endif %}

    {% if json.function is defined and json.function %}
        vars.function_v = "{{ json.function }}"
    {% endif %}
    {% if  json.serial_number is defined and json.serial_number %}
        vars.serial_number = "{{ json.serial_number}}"
    {% endif %}

    {% if json.vendor is defined and json.vendor %}
        vars.vendor = "{{ json.vendor }}"
    {% endif %}

    {% if json.model is defined and json.model %}
        vars.model = "{{ json.model }}"
    {% endif %}

    {% if json.wlc is defined and json.wlc %}
        vars.wlc = "{{ json.wlc }}"
    {% endif %}
}

Is it possible that I assign variable in service instance from host instance for device that match conditions?
Tadeja

2

Hi,

you need to modify the assign where expression so that it takes the host object variable into account, like so:

assign where host.vars.function_v  == "access_point"

This is also available inside the local apply scope, and works for setting values from the host object. Maybe you’d want to check for existence first prior to assigning it.

  if (host.vars.wlc != "") {
    vars.url = host.vars.wlc
  }

Cheers,
Michael