Microservices

In this tutorial, you will apply the concepts from the previous tutorials to build, deploy, and manage an end-to-end microservices application in Kubernetes. The sample web application you’ll use in this tutorial is a “todo list” application written in Node.js that uses MongoDB as a database. You’ll build a container image for this app from a Dockerfile, and push the image to Docker Hub, and then deploy it to your cluster. Then you’ll scale the app to meet increased demand.

When introducing new versions of a service, it is often desirable to shift a controlled percentage of user traffic to a newer version of the service in the process of phasing out the older version. This technique is called a canary deployment. In this tutorial, you will create a canary deployment using Istio with Kubernetes.

A service mesh is an infrastructure layer that allows you to manage communication between your application’s microservices. In this tutorial, you will install Istio using the Helm package manager for Kubernetes. You will then use Istio to expose a Node.js application by creating a Gateway and Virtual Service. You will then access the Grafana telemetry addon to visualize traffic data.