Book Image

Practical DevOps

By : joakim verona
Book Image

Practical DevOps

By: joakim verona

Overview of this book

DevOps is a practical field that focuses on delivering business value as efficiently as possible. DevOps encompasses all the flows from code through testing environments to production environments. It stresses the cooperation between different roles, and how they can work together more closely, as the roots of the word imply—Development and Operations. After a quick refresher to DevOps and continuous delivery, we quickly move on to looking at how DevOps affects architecture. You'll create a sample enterprise Java application that you’ll continue to work with through the remaining chapters. Following this, we explore various code storage and build server options. You will then learn how to perform code testing with a few tools and deploy your test successfully. Next, you will learn how to monitor code for any anomalies and make sure it’s running properly. Finally, you will discover how to handle logs and keep track of the issues that affect processes
Table of Contents (17 chapters)
Practical DevOps
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Build slaves


To reduce build queues, you can add build slaves. The master server will send builds to the slaves based on a round-robin scheme or tie specific builds to specific build slaves.

The reason for this is usually that some builds have certain requirements on the host operating system.

Build slaves can be used to increase the efficiency of parallel builds. They can also be used to build software on different operating systems. For instance, you can have a Linux Jenkins master server and Windows slaves for components that use Windows build tools. To build software for the Apple Mac, it's useful to have a Mac build slave, especially since Apple has quirky rules regarding the deployment of their operating system on virtual servers.

There are several methods to add build slaves to a Jenkins master; see https://wiki.jenkins-ci.org/display/JENKINS/Distributed+builds.

In essence, there must be a way for the Jenkins master to issue commands to the build slave. This command channel can be the...