Try Using Kubernetes for Free

kubesail provide a Free plan to allow us to start trying kubernete, amazing! Here we will create a simple nignix web service and expose to the internet.

Install kubectl on MacOS

brew install kubernetes-cli

kubectl version to ensure installed and up-to-date

Normally, it will response like:
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.3", GitCommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", GitTreeState:"clean", BuildDate:"2018-05-21T09:17:39Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"darwin/amd64"} Unable to connect to the server: dial tcp i/o timeout

It shows kubectl installed, ignore the error Unable to connect to the server: dial tcp i/o timeout because we have not set up the kubernet cluster config yet.

Kubectl Config

Login into kubesail then click GET KUBECTL CONFIG, copy the config to your local config file ~/.kube/config. Then you could check your Kubernetes cluster manager by type kubectl config current-context ; kubectl cluster-info ; kubectl get deployments. For more information, please refer to the official document.

💡 Hint: When you encounter error like cannot list resource "pods" in API group "" when you run kubectl pods, there are a possbile reason is that you have not create any pods, services yet.

Start a Simple Http Server

kubectl run first-deployment --image=katacoda/docker-http-server --port=80

After that you can see the deployment by kubectl get pods or kubectl get deployments

View the Logs of one pod:

kubectl logs -f first-deployment-5bc5c8cd58-stbqp Note here the pod name maybe different in your cluster, you should get the name by kubectl get pods

Expose to Internet

We need create a service to expose the port, refer the official document

However, currently, we can not create service (refer to here) by kubectl expose deployment first-deployment --port=80 --type=NodePort directly on kubesail, instead, we can set it up on our web tool on kubesail site.(Go to Home of your account, click the deployment you have created here should be first-deployment, then you will see the ports button click it, you have the choice to expose the port to internet or internally).

After you do that, after a while, you should be able to see the web service home page, Congratulations!

Remove a Deployment

kubectl delete first-deployment

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