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Run helloworld service in minikube cluster via CLI

Start demo cluster:

minikube start --driver=kvm2

Make a deployment. This command runs container in a pod, but it is unavailable from outside of cluster.

kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10
deployment.apps/hello-minikube created

kubectl get deployment
NAME             READY   UP-TO-DATE   AVAILABLE   AGE
hello-minikube   1/1     1            1           61s

kubectl get pods
NAME                              READY   STATUS    RESTARTS   AGE
hello-minikube-64b64df8c9-v5t7r   1/1     Running   0          2m35s

docker ps | grep echo
603c7183f61b        k8s.gcr.io/echoserver   "/usr/local/bin/run.…"   3 minutes ago       Up 3 minutes                            k8s_echoserver_hello-minikube-64b64df8c9-v5t7r_default_6e0075ca-ae88-4526-a7f7-231a65485ea1_0

To make running app available from outside of the cluster we need to make a service:

kubectl expose deployment hello-minikube --type=NodePort --port=8080
service/hello-minikube exposed

kubectl get services
NAME             TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
hello-minikube   NodePort    10.101.132.171   <none>        8080:31186/TCP   45s

Service type NodePort means that a port from a node will be exposed at the cluster address. Here 8080 is port on the node, 31186 is respective port on the cluster address. Cluster address can be obtained with minikube ip.

export NODE_PORT=$(kubectl get services/hello-minikube -o go-template='{{(index .spec.ports 0).nodePort}}')
echo NODE_PORT=$NODE_PORT

Or service address can be obtained with:

minikube service hello-minikube --url
http://192.168.39.196:31186

Now we can call the service:

curl $(minikube ip):$NODE_PORT


Hostname: hello-minikube-64b64df8c9-v5t7r

Pod Information:
	-no pod information available-

Server values:
	server_version=nginx: 1.13.3 - lua: 10008

Request Information:
	client_address=172.17.0.1
	method=GET
	real path=/
	query=
	request_version=1.1
	request_scheme=http
	request_uri=http://192.168.39.196:8080/

Request Headers:
	accept=*/*
	host=192.168.39.196:31186
	user-agent=curl/7.58.0

Request Body:
	-no body in request

Stop the cluster and delete it:

minikube stop
✋  Stopping node "minikube"  ...
🛑  1 nodes stopped.

minikube delete
🔥  Deleting "minikube" in kvm2 ...
💀  Removed all traces of the "minikube" cluster.