ec2_hosts.cfg

{# loop thru all relevant nodes #}
{% for i in ansible_play_batch | sort %}

{# set the node name AND node vars #}
{% set node_name=i %}
{% set node_vars=hostvars[ i ] %}

{# define the nagios hostgroup vars associated with this node .. default to linux #}
{% if node_vars.nagios_hostgroups is defined %}
{% set node_hostgroups="linux," ~ node_vars.nagios_hostgroups %}
{% else %}
{% set node_hostgroups="linux" %}
{% endif %}

{# define the nagios hostgroup arr so we can do some easy checking #}
{% set node_hostgroups_arr=node_hostgroups.split(",") %}

#############################
## START {{ node_name }}
#############################

define host {

  use linux-server
  host_name {{ node_name }}
  address   {{ node_vars.ansible_ec2_local_ipv4 | default('127.0.0.1') }}

  hostgroups {{ node_hostgroups }}

  # it's nice to have some ec2 data as nagios host vars
  _ec2_instance_id                 {{ node_vars.ansible_ec2_instance_id }}
  _ec2_instance_type               {{ node_vars.ansible_ec2_instance_type }}
  _ec2_placement_availability_zone {{ node_vars.ansible_ec2_placement_availability_zone }}
  _ec2_placement_region            {{ node_vars.ansible_ec2_placement_region }}
  _ec2_security_groups             {{ node_vars.ansible_ec2_security_groups }}

}

#############################
## NRPE dependencies
## if NRPE aint available, these will fail
#############################

# SWAP
define servicedependency {
  host_name                       {{ node_name }}
  service_description             NRPE Port
  dependent_host_name             {{ node_name }}
  dependent_service_description   Swap
  execution_failure_criteria      n
  notification_failure_criteria   w,u,c
}

# CPU
define servicedependency {
  host_name                       {{ node_name }}
  service_description             NRPE Port
  dependent_host_name             {{ node_name }}
  dependent_service_description   CPU
  execution_failure_criteria      n
  notification_failure_criteria   w,u,c
}

# you can go on and on here ..
# for a very long time ..

#############################
## END {{ node_name }}
#############################

{% endfor %}