Add ExternalDNS configuration and setup script for Cloudflare integration

infrastructure_setup/externaldns/externaldns-cloudflare.yaml

@@ -0,0 +1,39 @@
+---
+# CloudFlare provider for ExternalDNS
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: external-dns
+  namespace: externaldns
+spec:
+  selector:
+    matchLabels:
+      app: external-dns
+  strategy:
+    type: Recreate
+  template:
+    metadata:
+      labels:
+        app: external-dns
+    spec:
+      serviceAccountName: external-dns
+      containers:
+        - name: external-dns
+          image: registry.k8s.io/external-dns/external-dns:v0.13.4
+          args:
+            - --source=service
+            - --source=ingress
+            - --txt-owner-id=${OWNER_ID}
+            - --provider=cloudflare
+            - --domain-filter=${DOMAIN}
+            #- --exclude-domains=internal.${DOMAIN}
+            - --cloudflare-dns-records-per-page=5000
+            - --publish-internal-services
+            - --no-cloudflare-proxied
+            - --log-level=debug
+          env:
+            - name: CF_API_TOKEN
+              valueFrom:
+                secretKeyRef:
+                  name: cloudflare-api-token
+                  key: api-token