copy over k8s guestbook application example for use in tutorial

Signed-off-by: Will Tsai <[email protected]>

samples/README.md

@@ -1,4 +1,4 @@
-# Reference applicatins
+# Reference applications
 
 Reference apps are templates that show a complete app. You are able to clone and deploy any of these apps to try out various Project Radius functionality.
 

samples/kubernetes/guestbook/README.md

@@ -0,0 +1,5 @@
+# Kubernetes Guestbook application example
+
+This is an example containerized Guestbook application originally authored by the Kubernetes community for use in their own tutorial. The application's Kubernetes deployment manifests copied over from the Kubernetes source [repo](https://github.com/kubernetes/examples/tree/master/guestbook) are contained in the `deploy` directory. 
+
+The Guestbook application consists of a web front end along with primary and secondary Redis containers for storage, all deployed with Kubernetes. For more information about the application and access its source code, see the [Kubernetes tutorial](https://kubernetes.io/docs/tutorials/stateless-application/guestbook/) and their [examples repo](https://github.com/kubernetes/examples/tree/master/guestbook).

samples/kubernetes/guestbook/deploy/frontend-deployment.yaml

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+apiVersion: apps/v1 #  for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
+kind: Deployment
+metadata:
+  name: frontend
+spec:
+  selector:
+    matchLabels:
+      app: guestbook
+      tier: frontend
+  replicas: 3
+  template:
+    metadata:
+      labels:
+        app: guestbook
+        tier: frontend
+    spec:
+      containers:
+      - name: php-redis
+        image: gcr.io/google-samples/gb-frontend:v4
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+        env:
+        - name: GET_HOSTS_FROM
+          value: dns
+          # If your cluster config does not include a dns service, then to
+          # instead access environment variables to find service host
+          # info, comment out the 'value: dns' line above, and uncomment the
+          # line below:
+          # value: env
+        ports:
+        - containerPort: 80

samples/kubernetes/guestbook/deploy/frontend-service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+  labels:
+    app: guestbook
+    tier: frontend
+spec:
+  # comment or delete the following line if you want to use a LoadBalancer
+  type: NodePort
+  # if your cluster supports it, uncomment the following to automatically create
+  # an external load-balanced IP for the frontend service.
+  # type: LoadBalancer
+  ports:
+  - port: 80
+  selector:
+    app: guestbook
+    tier: frontend

samples/kubernetes/guestbook/deploy/redis-master-deployment.yaml

@@ -0,0 +1,27 @@
+apiVersion: apps/v1 #  for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
+kind: Deployment
+metadata:
+  name: redis-master
+spec:
+  selector:
+    matchLabels:
+      app: redis
+      role: master
+      tier: backend
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: redis
+        role: master
+        tier: backend
+    spec:
+      containers:
+      - name: master
+        image: registry.k8s.io/redis:e2e  # or just image: redis
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+        ports:
+        - containerPort: 6379

samples/kubernetes/guestbook/deploy/redis-master-service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-master
+  labels:
+    app: redis
+    role: master
+    tier: backend
+spec:
+  ports:
+  - port: 6379
+    targetPort: 6379
+  selector:
+    app: redis
+    role: master
+    tier: backend

samples/kubernetes/guestbook/deploy/redis-replica-deployment.yaml

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+apiVersion: apps/v1 #  for k8s versions before 1.9.0 use apps/v1beta2  and before 1.8.0 use extensions/v1beta1
+kind: Deployment
+metadata:
+  name: redis-replica
+spec:
+  selector:
+    matchLabels:
+      app: redis
+      role: replica
+      tier: backend
+  replicas: 2
+  template:
+    metadata:
+      labels:
+        app: redis
+        role: replica
+        tier: backend
+    spec:
+      containers:
+      - name: slave
+        image: gcr.io/google_samples/gb-redisslave:v1
+        resources:
+          requests:
+            cpu: 100m
+            memory: 100Mi
+        env:
+        - name: GET_HOSTS_FROM
+          value: dns
+          # If your cluster config does not include a dns service, then to
+          # instead access an environment variable to find the master
+          # service's host, comment out the 'value: dns' line above, and
+          # uncomment the line below:
+          # value: env
+        ports:
+        - containerPort: 6379

samples/kubernetes/guestbook/deploy/redis-replica-service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-replica
+  labels:
+    app: redis
+    role: replica
+    tier: backend
+spec:
+  ports:
+  - port: 6379
+  selector:
+    app: redis
+    role: replica
+    tier: backend