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

hieradata/roles/infra/dns/externaldns.yaml

@@ -0,0 +1,65 @@
+---
+hiera_include:
+  - externaldns
+  - frrouting
+  - exporters::frr_exporter
+
+externaldns::bind_master_hostname: 'ausyd1nxvm2127.main.unkin.net'
+externaldns::k8s_zones:
+  - 'k8s.syd1.au.unkin.net'
+  - '200.18.198.in-addr.arpa'
+externaldns::slave_servers:
+  - 'ausyd1nxvm2128.main.unkin.net'
+  - 'ausyd1nxvm2129.main.unkin.net'
+externaldns::externaldns_key_algorithm: 'hmac-sha256'
+
+# networking
+anycast_ip: 198.18.19.20
+systemd::manage_networkd: true
+systemd::manage_all_network_files: true
+networking::interfaces:
+  eth0:
+    type: physical
+    forwarding: true
+    dhcp: true
+  anycast0:
+    type: dummy
+    ipaddress: "%{hiera('anycast_ip')}"
+    netmask: 255.255.255.255
+    mtu: 1500
+
+# frrouting
+exporters::frr_exporter::enable: true
+frrouting::ospfd_router_id: "%{facts.networking.ip}"
+frrouting::ospfd_redistribute:
+  - connected
+frrouting::ospfd_interfaces:
+  eth0:
+    area: 0.0.0.0
+  anycast0:
+    area: 0.0.0.0
+frrouting::daemons:
+  ospfd: true
+
+# consul
+profiles::consul::client::node_rules:
+  - resource: service
+    segment: frr_exporter
+    disposition: write
+
+# additional repos
+profiles::yum::global::repos:
+  frr-extras:
+    name: frr-extras
+    descr: frr-extras repository
+    target: /etc/yum.repos.d/frr-extras.repo
+    baseurl: https://packagerepo.service.consul/frr/el9/extras-daily/%{facts.os.architecture}/os
+    gpgkey: https://packagerepo.service.consul/frr/el9/extras-daily/%{facts.os.architecture}/os/RPM-GPG-KEY-FRR
+    mirrorlist: absent
+  frr-stable:
+    name: frr-stable
+    descr: frr-stable repository
+    target: /etc/yum.repos.d/frr-stable.repo
+    baseurl: https://packagerepo.service.consul/frr/el9/stable-daily/%{facts.os.architecture}/os
+    gpgkey: https://packagerepo.service.consul/frr/el9/stable-daily/%{facts.os.architecture}/os/RPM-GPG-KEY-FRR
+    mirrorlist: absent