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$ kubectl --namespace=production set image deployment/kubeapp-production kubeapp=gcr.io/$PROJECT_ID/app:2.0

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$ for i in `seq 1 10`; do curl http://$SERVICE_IP/version; sleep 1;  done
1.0
1.0
1.0
2.0
1.0
2.0
1.0
2.0
1.0

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# Parse PROJECT_ID in k8s config
$ sed -i.bak "s#PROJECT_ID#$PROJECT_ID#" app-canary.yml

$ kubectl --namespace=production apply -f app-canary.yml
deployment "kubeapp-canary" created

$ kubectl --namespace=production get pods
NAME                                  READY     STATUS    RESTARTS   AGE
kubeapp-canary-469258524-2qjk0        1/1       Running   0          32s
kubeapp-production-1443420586-58njk   1/1       Running   0          1h

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kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  name: kubeapp-canary
spec:
  replicas: 1
  template:
    metadata:
      name: kubeapp
      labels:

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$ export app_version=2.0

$ docker build --build-arg version=$app_version -t gcr.io/$PROJECT_ID/app:$app_version .
Sending build context to Docker daemon  16.48MB
Step 1/6 : FROM alpine:latest
 ---> 7328f6f8b418
Step 2/6 : MAINTAINER The Dockbit Team "team@dockbit.com"
 ---> Using cache
 ---> 6abecc069f97
Step 3/6 : ARG version=1.0

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$ export SERVICE_IP=$(kubectl --namespace=production get service/app-lb --output=json | jq -r '.status.loadBalancer.ingress[0].ip')

$ curl http://$SERVICE_IP/
Congratulations! Version 1.0 of your application is running on Kubernetes.

$ curl http://$SERVICE_IP/version
1.0

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$ kubectl --namespace=production get services
  
NAME      CLUSTER-IP     EXTERNAL-IP     PORT(S)        AGE
app-lb    10.63.250.99   35.196.71.189   80:32250/TCP   2m

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$ kubectl --namespace=production apply -f app-lb.yml 

service "app-lb" created

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kind: Service
apiVersion: v1
metadata:
  name: app-lb
spec:
  type: LoadBalancer
  ports:
  - name: http
    port: 80
    targetPort: 8080

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$ kubectl --namespace=production get pods -o wide

NAME                                  READY     STATUS    RESTARTS   AGE       IP          NODE
kubeapp-production-1979975788-8gkxn   1/1       Running   0          1m        10.60.2.7   gke-canary-default-pool-f3096f17-76ld
kubeapp-production-1979975788-m5v7r   1/1       Running   0          1m        10.60.0.9   gke-canary-default-pool-f3096f17-g4fc
kubeapp-production-1979975788-phhkw   1/1       Running   0          1m        10.60.1.7   gke-canary-default-pool-f3096f17-lxqs