148422597X Kubernetes Management Design Patterns [Vohra 2017-01-29] {E559F6BB}

Chapter 16 ■ Developing a Highly Available Website
Creating a Kubernetes Service
In this section we shall create a hello-world application and expose the application as a service of type
LoadBalancer on each of the three Kubernetes clusters. As a result, three elastic load balancers each
exposing the hello-world service should be available.
SSH log in to each of the controller instances and after verifying that the cluster nodes are being listed
create an application with the tutum/hello-world Docker image.
kubectl -s http://localhost:8080 run hello-world --image=tutum/hello-world --replicas=2
--port=8
List the cluster-wide pods:
kubectl get pods –o wide
List the deployments:
kubectl get deployments
Subsequently, expose the deployment as a service of type LoadBalancer:
kubectl expose deployment hello-world--port=80 --type=LoadBalancer
List the services:
kubectl get services
The output from the preceding commands is shown in Figure 16-10.
Figure 16-10. Creating a hello-world deployment and service
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