Book Image

Jenkins Administrator's Guide

By : Calvin Sangbin Park, Lalit Adithya, Sam Gleske
Book Image

Jenkins Administrator's Guide

By: Calvin Sangbin Park, Lalit Adithya, Sam Gleske

Overview of this book

Jenkins is a renowned name among build and release CI/CD DevOps engineers because of its usefulness in automating builds, releases, and even operations. Despite its capabilities and popularity, it's not easy to scale Jenkins in a production environment. Jenkins Administrator's Guide will not only teach you how to set up a production-grade Jenkins instance from scratch, but also cover management and scaling strategies. This book will guide you through the steps for setting up a Jenkins instance on AWS and inside a corporate firewall, while discussing design choices and configuration options, such as TLS termination points and security policies. You’ll create CI/CD pipelines that are triggered through GitHub pull request events, and also understand the various Jenkinsfile syntax types to help you develop a build and release process unique to your requirements. For readers who are new to Amazon Web Services, the book has a dedicated chapter on AWS with screenshots. You’ll also get to grips with Jenkins Configuration as Code, disaster recovery, upgrading plans, removing bottlenecks, and more to help you manage and scale your Jenkins instance. By the end of this book, you’ll not only have a production-grade Jenkins instance with CI/CD pipelines in place, but also knowledge of best practices by industry experts.
Table of Contents (13 chapters)
12
Index

Quick performance improvements in an existing Jenkins instance

Some Jenkins configuration out of the box is not necessarily the best setting for scaling up Jenkins usage in the long term. Some settings provided by plugins can even be hidden behind application start up options. This section will recommend top-level settings and other tips for improving the load time of the Jenkins controller landing page.

GitHub Pull Request Builder plugin boot optimization

If you are using the GitHub Pull Request Builder (GHPRB) plugin, then you may notice it has a steep start up bottleneck when booting Jenkins controllers. Once you've reached over 100 jobs, you'll start to realize that the Jenkins start up time becomes very delayed when booting or restarting your controller. On Jenkins controllers as large as 1,000+ jobs, I have seen Jenkins startup delayed by up to 20 minutes and more.

The root cause behind the start up delay is the fact that the GHPRB plugin forces all...