chore: use alias for nameservers

- use an alias for nameservers for dhcp ranges
- move aliased nameservers to region-wide hiera

hieradata/country/au/region/drw1.yaml

@@ -1,2 +1,9 @@
 ---
 timezone::timezone: 'Australia/Darwin'
+profiles_dns_upstream_forwarder_unkin:
+  - 198.18.17.23
+  - 198.18.17.24
+profiles_dns_upstream_forwarder_consul:
+  - 198.18.17.34
+  - 198.18.17.35
+  - 198.18.17.36

hieradata/country/au/region/drw1/infra/dns/resolver.yaml

@@ -1,8 +1 @@
 ---
-profiles_dns_upstream_forwarder_unkin:
-  - 198.18.17.23
-  - 198.18.17.24
-profiles_dns_upstream_forwarder_consul:
-  - 198.18.17.34
-  - 198.18.17.35
-  - 198.18.17.36

hieradata/country/au/region/syd1.yaml

@@ -1,3 +1,7 @@
 ---
 timezone::timezone: 'Australia/Sydney'
 certbot::client::webserver: ausyd1nxvm1021.main.unkin.net
+profiles_dns_upstream_forwarder_unkin:
+  - 198.18.19.15
+profiles_dns_upstream_forwarder_consul:
+  - 198.18.19.14

hieradata/country/au/region/syd1/infra/dns/resolver.yaml

@@ -1,5 +1 @@
 ---
-profiles_dns_upstream_forwarder_unkin:
-  - 198.18.19.15
-profiles_dns_upstream_forwarder_consul:
-  - 198.18.19.14

hieradata/roles/infra/dhcp/server.yaml

@@ -15,9 +15,7 @@ profiles::dhcp::server::pools:
     range:
       - '198.18.15.200 198.18.15.220'
     gateway: 198.18.15.254
-    nameservers:
+    nameservers: "%{alias('profiles_dns_upstream_forwarder_unkin')}"
-      - 198.18.13.12
-      - 198.18.13.13
     domain_name: main.unkin.net
     pxeserver: 198.18.13.27
   syd1-test:
@@ -26,9 +24,7 @@ profiles::dhcp::server::pools:
     range:
       - '198.18.16.200 198.18.16.220'
     gateway: 198.18.16.254
-    nameservers:
+    nameservers: "%{alias('profiles_dns_upstream_forwarder_unkin')}"
-      - 198.18.13.12
-      - 198.18.13.13
     domain_name: main.unkin.net
     pxeserver: 198.18.13.27
   syd1-prod1:
@@ -37,9 +33,7 @@ profiles::dhcp::server::pools:
     range:
       - '198.18.13.200 198.18.13.220'
     gateway: 198.18.13.254
-    nameservers:
+    nameservers: "%{alias('profiles_dns_upstream_forwarder_unkin')}"
-      - 198.18.13.12
-      - 198.18.13.13
     domain_name: main.unkin.net
     pxeserver: 198.18.13.27
   syd1-prod2:
@@ -48,9 +42,7 @@ profiles::dhcp::server::pools:
     range:
       - '198.18.14.200 198.18.14.220'
     gateway: 198.18.14.254
-    nameservers:
+    nameservers: "%{alias('profiles_dns_upstream_forwarder_unkin')}"
-      - 198.18.13.12
-      - 198.18.13.13
     domain_name: main.unkin.net
     pxeserver: 198.18.13.27
   drw1-prod:
@@ -59,9 +51,7 @@ profiles::dhcp::server::pools:
     range:
       - '198.18.17.200 198.18.17.220'
     gateway: 198.18.17.1
-    nameservers:
+    nameservers: "%{alias('profiles_dns_upstream_forwarder_unkin')}"
-      - 198.18.17.7
-      - 198.18.17.8
     domain_name: main.unkin.net
     pxeserver: 198.18.13.27