lets try not defining some

inventory/group_vars/all

@@ -262,6 +262,7 @@ nagios_Check_Services:
   dhcpd: false
   httpd: false
   swap: true
+  ping: true
 
 # Set variable if we want to use our global iptables defaults
 # Some things need to set their own.

inventory/host_vars/batcave13.rdu2.fedoraproject.org

@@ -25,6 +25,12 @@ datacenter: rdu
 postfix_group: vpn
 vpn: true
 
+nagios_Check_Services:
+  nrpe: false
+  sshd: false
+  swap: false
+  ping: false
+
 nrpe_procs_warn: 1200
 nrpe_procs_crit: 1400
 

roles/nagios_server/templates/nagios/hosts/rdu-hosts.cfg.j2

@@ -1,13 +1,12 @@
 {% for host in groups['all'] %}
-{% if hostvars[host].datacenter == 'rdu' %}
+{% if hostvars[host].datacenter == 'rdu' and hostvars[host].nagios_Check_Services['ping'] == true %}
 define host {
 {% if vars['nagios_location'] == 'internal' %}
    use                     defaulttemplate
 {% else %}
   use                          mincheck
 {% endif %}
-
-   host_name               {{ host }}
+  host_name               {{ host }}
 {% if hostvars[host].ansible_hostname is defined %}
    alias                   {{ hostvars[host].ansible_hostname }}
 {% else %}
@@ -24,5 +23,6 @@ define host {
    parents                 rdu-gw
 {% endif %}
 }
+
 {% endif %}
 {% endfor %}