Kubernetes Engine Tutorial

Introduction

Kubernetes Engine, also known as Google Kubernetes Engine (GKE), is a managed environment for deploying, managing, and scaling your containerized applications using Google infrastructure. With GKE, you can quickly and easily get started with Kubernetes without having to manage the underlying infrastructure.

Prerequisites

Before you start using GKE, make sure you have the following:

• A Google Cloud account.
• Google Cloud SDK installed on your local machine.
• Basic knowledge of Kubernetes concepts.

Setting Up Google Cloud SDK

To interact with GKE, you need to set up the Google Cloud SDK. Follow these steps:

curl https://sdk.cloud.google.com | bash

gcloud init

Creating a Kubernetes Cluster

Create a Kubernetes cluster in GKE with the following command:

gcloud container clusters create my-cluster --zone us-central1-a

This command will create a cluster named my-cluster in the us-central1-a zone.

Deploying Applications

Deploy your first application to the Kubernetes cluster. Create a deployment using the following command:

kubectl create deployment hello-server --image=gcr.io/google-samples/hello-app:1.0

This command deploys a simple Hello World application.

Exposing the Application

Expose the deployment to the internet using a LoadBalancer service:

kubectl expose deployment hello-server --type=LoadBalancer --port 80 --target-port 8080

This command creates a service that exposes the application on port 80.

Scaling the Application

Scale the number of replicas in your deployment:

kubectl scale deployment hello-server --replicas=3

This command scales the deployment to 3 replicas.

Updating the Application

Update the application to a new version:

kubectl set image deployment/hello-server hello-app=gcr.io/google-samples/hello-app:2.0

This command updates the deployment to use version 2.0 of the Hello World application.

Cleaning Up

To clean up the resources you created, delete the cluster:

gcloud container clusters delete my-cluster --zone us-central1-a

This command deletes the cluster and all associated resources.

Conclusion

In this tutorial, you learned how to set up a Kubernetes cluster using Google Kubernetes Engine, deploy an application, expose it to the internet, scale it, update it, and finally clean up the resources. GKE makes it easy to manage Kubernetes clusters and deploy containerized applications at scale.