Use more dynamic group config for dna-gw hosts

group_vars/dnagw.yml

@@ -2,29 +2,38 @@
 # increase memory size
 mem_size: 512
 
+intnet_netmask: "{{ network_interfaces[0].netmask }}"
+intnet_prefix: >-
+  {% set ip = network_interfaces[0].ipaddr.split('.') -%}
+  {% if intnet_netmask == '255.255.252.0' -%}
+  {{ [ ip[0], ip[1], ip[2] | int - 1 ] | join('.') -}}
+  {% else -%}
+  {{ [ ip[0], ip[1], ip[2] ] | join('.') -}}
+  {% endif -%}
+
 network_vip_interfaces:
   - device: vio0
     vhid: 1
-    ipaddr: 172.20.20.1
-    netmask: 255.255.252.0
+    ipaddr: "{{ intnet_prefix }}.1"
+    netmask: "{{ intnet_netmask }}"
     pass: "{{ vip1_pass }}"
     priority: 120
   - device: vio0
     vhid: 10
-    ipaddr: 172.20.20.10
-    netmask: 255.255.252.0
+    ipaddr: "{{ intnet_prefix }}.10"
+    netmask: "{{ intnet_netmask }}"
     pass: "{{ vip10_pass }}"
     priority: 120
   - device: vio0
     vhid: 11
-    ipaddr: 172.20.20.11
-    netmask: 255.255.252.0
+    ipaddr: "{{ intnet_prefix }}.11"
+    netmask: "{{ intnet_netmask }}"
     pass: "{{ vip11_pass }}"
     priority: "{{ vip11_priority }}"
   - device: vio0
     vhid: 12
-    ipaddr: 172.20.20.12
-    netmask: 255.255.252.0
+    ipaddr: "{{ intnet_prefix }}.12"
+    netmask: "{{ intnet_netmask }}"
     pass: "{{ vip12_pass }}"
     priority: "{{ vip12_priority }}"
 network_ether_interfaces:
@@ -43,4 +52,4 @@ ifstated_config: ifstated-dna.conf.j2
 
 # ssh host alaises
 ssh_hostnames:
-  - gw.home.foo.sh
+  - "gw.{{ inventory_hostname.split('.')[1] }}.foo.sh"