Kubernetes Quick Dive

Launch vote application with kubernetes. (simiar to docker run command)

kubectl  run vote --image=schoolofdevops/vote

kubectl get pods

Publish the application (similar to using -P for port mapping)

kubectl expose deployment vote --type=NodePort --port 80

kubectl get svc

Scale the vote app to run 4 instances.

kubectl scale --replicas=4 deployment/vote
kubectl get pods

Connect to the app, refresh the page to see it load balancing. Also try to vote and observe what happens.

Setup additional apps

Now lets launch rest of the apps.

kubectl  run redis  --image=redis:alpine

kubectl expose deployment redis --port 6379


kubectl  run worker --image=schoolofdevops/worker

kubectl  run db --image=postgres:9.4

kubectl expose deployment db --port 5432

kubectl run result --image=schoolofdevops/vote-result

kubectl expose deployment result --type=NodePort --port 80

Cleaing up

Once you are done observing, you could delete it with the following commands,

kubectl delete deploy db redis vote worker result

kubectl delete svc db redis results vote