minikube_run_helloworld_workload.md

Publishing workloads on Kubernetes using Minikube

Your first workload is a "Hello World" type workload. This is a great way to quickly validate your Minikube deployment is functional.

kubectl run hello-minikube --image=k8s.gcr.io/echoserver:1.10 --port=8080

Output will be 'deployment "hello-minikube" created'

NOTE: kubectl run --generator=deployment/apps.v1 is DEPRECATED and will be removed in a future version. Use kubectl run --generator=run-pod/v1 or kubectl create instead.

Make the service accessible

kubectl expose deployment hello-minikube --type=NodePort

service "hello-minikube" exposed

We have now launched an echoserver pod but we have to wait until the pod is up before curling/accessing it via the exposed service.

To check whether the pod is up and running we can use the following:

kubectl get pod

NAME READY STATUS RESTARTS AGE hello-minikube-3383150820-vctvh 0/1 ContainerCreating 0 3s

We can see that the pod is still being created from the ContainerCreating status

kubectl get pod

NAME READY STATUS RESTARTS AGE hello-minikube-3383150820-vctvh 1/1 Running 0 13s

We can see that the pod is now Running and we will now be able to curl it:

curl $(minikube service hello-minikube --url)

Scale it up

kubectl scale --replicas=3 deployment/hello-minikube

Scale it down

kubectl scale --replicas=1 deployment/hello-minikube

Watch pod terminating

kubectl get pods

Delete the service

kubectl delete services hello-minikube

service "hello-minikube" deleted

Delete the deployment

kubectl delete deployment hello-minikube

deployment "hello-minikube" deleted

Stop minikube

minikube stop

Stopping local Kubernetes cluster... Stopping "minikube"…