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

Project overview

In this chapter, we will build a CD pipeline. Approving and merging a PR triggers a postmerge build in Jenkins to compile and package the project, run integration tests, apply version tags to the Git repositories and the artifacts, and deliver the artifacts (a Docker image in our case) to Docker Hub. At the end of the build, Jenkins pushes the Git tag to the GitHub repository:

Figure 4.1 – Postmerge CD build workflow

We will examine the GitHub build triggers for both AWS Jenkins, where GitHub has bidirectional communications, as well as firewalled Jenkins, where Jenkins can reach GitHub but GitHub cannot reach Jenkins:

Figure 4.2 – Different access rules from GitHub to AWS Jenkins and firewalled Jenkins

In order to build this postmerge CD pipeline, we need to create and configure the following:

  • Create build scripts and Dockerfiles that build, test, tag...