Add example of TLS termination using a classic ELB

examples/tls-termination/elb-nginx/README.md

@@ -0,0 +1,15 @@
+
+### Elastic Load Balancer for TLS termination
+
+This example shows the required steps to use classic Elastic Load Balancer for TLS termination. 
+
+Change line of the file `elb-tls-nginx-ingress-controller.yaml` replacing the dummy id with a valid one `"arn:aws:acm:us-west-2:XXXXXXXX:certificate/XXXXXX-XXXXXXX-XXXXXXX-XXXXXXXX"`
+
+Then execute:
+```
+$ kubectl create -f elb-tls-nginx-ingress-controller.yaml
+```
+
+This example creates an ELB with just two listeners, one in port 80 and another in port 443
+
+![Listeners](images/listener.png)

examples/tls-termination/elb-nginx/nginx-ingress-controller.yaml

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+kind: Service
+apiVersion: v1
+metadata:
+  name: nginx-default-backend
+  labels:
+    k8s-addon: ingress-nginx.addons.k8s.io
+spec:
+  ports:
+  - port: 80
+    targetPort: http
+  selector:
+    app: nginx-default-backend
+
+---
+
+kind: Deployment
+apiVersion: extensions/v1beta1
+metadata:
+  name: nginx-default-backend
+  labels:
+    k8s-addon: ingress-nginx.addons.k8s.io
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        k8s-addon: ingress-nginx.addons.k8s.io
+        app: nginx-default-backend
+    spec:
+      terminationGracePeriodSeconds: 60
+      containers:
+      - name: default-http-backend
+        image: gcr.io/google_containers/defaultbackend:1.0
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 8080
+            scheme: HTTP
+          initialDelaySeconds: 30
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 10m
+            memory: 20Mi
+          requests:
+            cpu: 10m
+            memory: 20Mi
+        ports:
+        - name: http
+          containerPort: 8080
+          protocol: TCP
+
+---
+
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  name: ingress-nginx
+  labels:
+    k8s-addon: ingress-nginx.addons.k8s.io
+
+---
+
+kind: Service
+apiVersion: v1
+metadata:
+  name: ingress-nginx
+  labels:
+    k8s-addon: ingress-nginx.addons.k8s.io
+  annotations:
+    # replace with the correct value of the generated certifcate in the AWS console
+    service.beta.kubernetes.io/aws-load-balancer-ssl-cert: "arn:aws:acm:us-west-2:XXXXXXXX:certificate/XXXXXX-XXXXXXX-XXXXXXX-XXXXXXXX" 
+    # the backend instances are HTTP
+    service.beta.kubernetes.io/aws-load-balancer-backend-protocol: "http"
+    # Map port 443
+    service.beta.kubernetes.io/aws-load-balancer-ssl-ports: "https"
+
+spec:
+  type: LoadBalancer
+  selector:
+    app: ingress-nginx
+  ports:
+  - name: http
+    port: 80
+    targetPort: http
+  - name: https
+    port: 443
+    targetPort: http
+
+---
+
+kind: Deployment
+apiVersion: extensions/v1beta1
+metadata:
+  name: ingress-nginx
+  labels:
+    k8s-addon: ingress-nginx.addons.k8s.io
+spec:
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: ingress-nginx
+        k8s-addon: ingress-nginx.addons.k8s.io
+    spec:
+      terminationGracePeriodSeconds: 60
+      containers:
+      - image: quay.io/aledbf/nginx-ingress-controller:0.154
+        name: ingress-nginx
+        imagePullPolicy: Always
+        ports:
+          - name: http
+            containerPort: 80
+            protocol: TCP
+        livenessProbe:
+          httpGet:
+            path: /healthz
+            port: 10254
+            scheme: HTTP
+          initialDelaySeconds: 30
+          timeoutSeconds: 5
+        env:
+          - name: POD_NAME
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.name
+          - name: POD_NAMESPACE
+            valueFrom:
+              fieldRef:
+                fieldPath: metadata.namespace
+        args:
+        - /nginx-ingress-controller
+        - --default-backend-service=$(POD_NAMESPACE)/nginx-default-backend
+        - --configmap=$(POD_NAMESPACE)/ingress-nginx
+        - --publish-service=$(POD_NAMESPACE)/ingress-nginx