[interfaces] Add IPv6 gateways

plays/network-interfaces.yml

@@ -7,10 +7,12 @@
         id: 2
         gateway: 185.230.79.99
         dns: 185.230.79.99
+        gateway_v6: 2a0c:700:2::ff:fe00:9902
       - name: srv_nat
         id: 3
         gateway: 172.16.3.99
         dns: 172.16.3.99
+        gateway_v6: 2a0c:700:3::ff:fe00:9903
       - name: san
         id: 4
       - name: adm
@@ -23,9 +25,11 @@
         id: 12
         gateway: 185.230.78.99
         dns: 185.230.78.99
+        gateway_v6: 2a0c:700:12::ff:fe00:9912
       - name: adh_nat
         id: 13
         gateway: 100.64.0.99
         dns: 100.64.0.99
+        gateway_v6: 2a0c:700:13::ff:fe00:9913
   roles:
     - interfaces

roles/interfaces/templates/network/interfaces.d/ifalias.j2

@@ -36,6 +36,9 @@ iface {{ interfaces[item.name] }} inet6 static
 {% for ip in (ips | ipv6) %}
 	address {{ ip }}/64
 {% endfor %}
+{% if item.gateway_v6 is defined %}
+	gateway {{ item.gateway_v6 }}
+{% endif %}
 {% if ansible_local.interfaces.sup_if_6 is defined %}
 {% if interfaces[item.name] in ansible_local.interfaces.sup_if_6 %}
 {% for line in ansible_local.interfaces.sup_if_6[interfaces[item.name]] %}