Update kubernetes demo/config for example

A couple of changes to make the kubernetes config work
and follow best practices.

- Use `deployment` instead of `pod`.
- Use correct image names.

After these changes, running `kubectl create -f demo/config/` creates a
working deployment/service.

demo/README.md

@@ -12,6 +12,8 @@ The pod is composed of 3 containers that share directories using 2 volumes:
 
 ## Usage
 
+### Build demo containers (Optional)
+
 Build the demo containers, and push them to a registry
 
 ```
@@ -20,11 +22,14 @@ docker build -t <some-registry>/hugo hugo/
 docker push <some-registry>/hugo <some-registry>/git-sync
 ```
 
+If you end up using a different registry, be sure to update `config/deployment.yaml`.
+
+###
+
 Create the pod and the service for the blog
 
 ```
-kubectl pods create config/pod.yaml
+kubectl create -f config
-kubectl services create config/service.yaml
 ```
 
 Open the service external ip in your browser

demo/config/deployment.yaml

@@ -0,0 +1,57 @@
+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: blog
+  labels:
+    name: blog
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      name: blog
+  template:
+    metadata:
+      labels:
+        name: blog
+    spec:
+      containers:
+      - name: git-sync
+        image: staging-k8s.gcr.io/git-sync-amd64:v2.0.6
+        imagePullPolicy: Always
+        volumeMounts:
+        - name: markdown
+          mountPath: /git
+        env:
+        - name: GIT_SYNC_REPO
+          value: https://github.com/kubernetes/git-sync.git
+        - name: GIT_SYNC_DEST
+          value: git-sync
+      - name: hugo
+        image: k8s.gcr.io/hugo
+        imagePullPolicy: Always
+        securityContext:
+          runAsUser: 0
+        volumeMounts:
+        - name: markdown
+          mountPath: /src
+        - name: html
+          mountPath: /dest
+        env:
+        - name: HUGO_SRC
+          value: /src/git-sync/demo/blog
+        - name: HUGO_BUILD_DRAFT
+          value: "true"
+        - name: HUGO_BASE_URL
+          value: example.com
+      - name: nginx
+        image: nginx
+        volumeMounts:
+        - name: html
+          mountPath: /usr/share/nginx/html
+        ports:
+        - containerPort: 80
+      volumes:
+      - name: markdown
+        emptyDir: {}
+      - name: html
+        emptyDir: {}

demo/config/pod.yaml

@@ -1,48 +0,0 @@
-apiVersion: v1
-kind: Pod
-metadata:
-  labels:
-    name: blog
-  name: blog-pod
-spec:
-  containers:
-  - name: git-sync
-    image: k8s.gcr.io/git-sync:v2.0.4
-    imagePullPolicy: Always
-    volumeMounts:
-    - name: markdown
-      mountPath: /git
-    env:
-    - name: GIT_SYNC_REPO
-      value: https://github.com/GoogleCloudPlatform/kubernetes.git
-    - name: GIT_SYNC_DEST
-      value: git
-  - name: hugo
-    image: k8s.gcr.io/hugo
-    imagePullPolicy: Always
-    securityContext:
-      runAsUser: 0
-    volumeMounts:
-    - name: markdown
-      mountPath: /src
-    - name: html
-      mountPath: /dest
-    env:
-    - name: HUGO_SRC
-      value: /src/git-sync/demo/blog
-    - name: HUGO_BUILD_DRAFT
-      value: "true"
-    - name: HUGO_BASE_URL
-      value: example.com
-  - name: nginx
-    image: nginx
-    volumeMounts:
-    - name: html
-      mountPath: /usr/share/nginx/html
-    ports:
-    - containerPort: 80
-  volumes:
-  - name: markdown
-    emptyDir: {}
-  - name: html
-    emptyDir: {}