feat: manage externaldns bind (#428)

- add module to manage externaldns bind for k8s - add infra::dns::externaldns role - add 198.18.19.20 as anycast for k8s external-dns service Reviewed-on: #428
2025-11-22 23:25:55 +11:00
parent 9854403b02
commit 0aec795aec
8 changed files with 187 additions and 0 deletions
@@ -0,0 +1,45 @@
+# ExternalDNS BIND master server class
+class externaldns::master inherits externaldns {
+
+  include bind
+
+  # Query PuppetDB for slave server IP addresses
+  $slave_ips = $externaldns::slave_servers.map |$fqdn| {
+    puppetdb_query("inventory[facts.networking.ip] { certname = '${fqdn}' }")[0]['facts.networking.ip']
+  }.filter |$ip| { $ip != undef }
+
+  # Create TSIG key for ExternalDNS authentication
+  bind::key { 'externaldns-key':
+    algorithm => $externaldns::externaldns_key_algorithm,
+    secret    => $externaldns::externaldns_key_secret,
+  }
+
+  # Create ACL for slave servers
+  if !empty($slave_ips) {
+    bind::acl { 'dns-slaves':
+      addresses => $slave_ips,
+    }
+  }
+
+  # Create master zones for each Kubernetes domain
+  $externaldns::k8s_zones.each |$zone| {
+    bind::zone { $zone:
+      zone_type       => 'master',
+      dynamic         => true,
+      allow_updates   => ['key externaldns-key'],
+      allow_transfers => empty($slave_ips) ? {
+        true  => [],
+        false => ['dns-slaves'],
+      },
+      ns_notify       => !empty($slave_ips),
+      also_notify     => $slave_ips,
+      dnssec          => false,
+    }
+  }
+
+  # Create default view to include the zones
+  bind::view { 'externaldns':
+    recursion => false,
+    zones     => $externaldns::k8s_zones,
+  }
+}