Code for ExternalDNS blog post

demo.yml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: nginx
  annotations:
    kubernetes.io/ingress.class: nginx
spec:
  rules:
  - host: nginx.extdns.ryaneschinger.com
    http:
      paths:
      - backend:
          serviceName: nginx
          servicePort: 80

---

apiVersion: v1
kind: Service
metadata:
  name: nginx
spec:
  ports:
  - port: 80
    targetPort: 80
  selector:
    app: nginx

---

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx
spec:
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - image: nginx
        name: nginx
        ports:
        - containerPort: 80

external-dns.yml

---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: external-dns
spec:
  strategy:
    type: Recreate
  template:
    metadata:
      labels:
        app: external-dns
    spec:
      containers:
      - name: external-dns
        image: registry.opensource.zalan.do/teapot/external-dns:v0.3.0-beta.0
        imagePullPolicy: Always
        args:
        - --domain-filter=$(DOMAIN_FILTER)
        - --source=service
        - --source=ingress
        - --provider=aws
        env:
        - name: DOMAIN_FILTER
          valueFrom:
            configMapKeyRef:
              name: external-dns
              key: domain-filter