Add configuration for CoreDNS and update host variables for lab environment

terraform/modules/apps/coredns/resources/Corefile.tpl

@@ -0,0 +1,24 @@
+.:53 {
+    errors
+    health {
+      lameduck 5s
+    }
+    ready
+    log . {
+      class error
+    }
+    prometheus :9153
+    forward . ${forward_dns_servers}
+    cache 30
+    loop
+    reload
+    loadbalance
+}
+
+%{ for z in zones ~}
+${z.fqdn}:53 {
+    file /etc/coredns/db.${z.fqdn}
+    log
+    errors
+}
+%{ endfor ~}

terraform/modules/apps/coredns/resources/db.zone.tpl

@@ -0,0 +1,13 @@
+$ORIGIN ${fqdn}.
+@         IN  SOA dns.${fqdn}. ${domain_master}.${fqdn}. (
+              ${timestamp} ; serial
+              ${refresh_rate}     ; refresh
+              ${retry_rate}     ; retry
+              ${expire_time}  ; expire
+              ${ttl} )   ; minimum
+
+          IN  NS  dns.${fqdn}.
+
+%{ for r in records ~}
+${r.name} IN ${r.type} ${r.content}
+%{ endfor ~}