Reorganized for new stable/waypoint versioning design.

coredns/versions/v1/README.md

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+# CoreDNS
+
+- https://kubernetes.io/docs/concepts/services-networking/dns-pod-service/
+- https://github.com/kubernetes/dns/blob/master/docs/specification.md
+- https://coredns.io/
+
+CoreDNS has the `kubernetes` plugin, so it returns all k8s service endpoints in well-known format.
+
+All services and pods are registered in CoreDNS.
+
+- <service-name>.<namespace>.svc.cluster.local
+- <service-name>.<namespace>
+- <service-name> (if in the same namespace)
+
+- <pod-ipv4-address>.<namespace>.pod.cluster.local
+- <pod-ipv4-address>.<service-name>.<namespace>.svc.cluster.local
+
+Any query for a resource in the `internal.$DOMAIN` domain will be given the IP of the Traefik proxy. We expose the CoreDNS server in the LAN via MetalLB just for this capability.
+
+## Default CoreDNS Configuration
+
+This is the default CoreDNS configuration, for reference:
+
+```txt
+.:53 {
+    errors
+    health { lameduck 5s }
+    ready
+    log . { class error }
+    prometheus :9153
+    kubernetes cluster.local in-addr.arpa ip6.arpa {
+        pods insecure
+        fallthrough in-addr.arpa ip6.arpa
+        ttl 30
+    }
+    forward . /etc/resolv.conf { max_concurrent 1000 }
+    cache 30 {
+        disable success cluster.local
+        disable denial cluster.local
+    }
+    loop
+    reload
+    loadbalance
+}
+```

coredns/versions/v1/coredns-custom-config.yaml

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+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: coredns-custom
+  namespace: kube-system
+data:
+  # Custom server block for internal domains. All internal domains should
+  # resolve to the cluster proxy.
+  internal.server: |
+    {{ .internalDomain }} {
+      errors
+      cache 30
+      reload
+      template IN A {
+        match (.*)\.{{ .internalDomain | strings.ReplaceAll "." "\\." }}\.
+        answer "{{`{{ .Name }}`}} 60 IN A {{ .loadBalancerIp }}"
+      }
+      template IN AAAA {
+        match (.*)\.{{ .internalDomain | strings.ReplaceAll "." "\\." }}\.
+        rcode NXDOMAIN
+      }
+    }
+  # Custom override to set external resolvers.
+  external.override: |
+    forward . {{ .externalResolver }} {
+      max_concurrent 1000
+    }

coredns/versions/v1/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - coredns-custom-config.yaml

coredns/versions/v1/manifest.yaml

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+version: v1.12.0
+requires:
+  - name: metallb
+defaultConfig:
+  namespace: kube-system
+  internalDomain: "{{ .cloud.internalDomain }}"
+  loadBalancerIp: "{{ .apps.metallb.loadBalancerIp }}"
+  externalResolver: "8.8.8.8"
+deploy:
+  restartDeployments:
+    - coredns
+  waitForRollout:
+    name: coredns