Book Image

Microservices Deployment Cookbook

By : Vikram Murugesan
Book Image

Microservices Deployment Cookbook

By: Vikram Murugesan

Overview of this book

This book will help any team or organization understand, deploy, and manage microservices at scale. It is driven by a sample application, helping you gradually build a complete microservice-based ecosystem. Rather than just focusing on writing a microservice, this book addresses various other microservice-related solutions: deployments, clustering, load balancing, logging, streaming, and monitoring. The initial chapters offer insights into how web and enterprise apps can be migrated to scalable microservices. Moving on, you’ll see how to Dockerize your application so that it is ready to be shipped and deployed. We will look at how to deploy microservices on Mesos and Marathon and will also deploy microservices on Kubernetes. Next, you will implement service discovery and load balancing for your microservices. We’ll also show you how to build asynchronous streaming systems using Kafka Streams and Apache Spark. Finally, we wind up by aggregating your logs in Kafka, creating your own metrics, and monitoring the metrics for the microservice.
Table of Contents (15 chapters)
Microservices Deployment Cookbook
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Configuring environment variables in Marathon


Environment variables play a vital role in any container. Be it your database or messaging server or your own RESTful API, environment variables can be used to store configurations of your container. So far in our geolocation microservice, we haven't come across a scenario to use environment variables as it is a standalone application and does not have to talk to any other server or middleware. But in production scenario where you microservice has to talk to a database or Kafka broker, you have to store the configurations of your database or broker somewhere. That's where developers prefer using environment variables. In this recipe we will take a look at how to configure our geolocation application to use an environment variable and also see how to pass that variable using Marathon.

Getting ready

Before we move on, we first need to know the environment variable that we are going to parameterize and how the geolocation application is going to use...