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

Use cases

We have divided the Use cases section into two parts. In the first part, we will build a library for sending pre-formatted Slack messages. This is the most commonly used shared library code pattern for providing a globally useful helper function. In the second part, we will develop our own DSL using the shared libraries in three different ways. This is a more advanced use case that will be useful in scaling your Jenkins instance. Let's get started.

Code reuse via global variables – Pre-formatted Slack messages

Required plugins

Slack Notification

Let's create a helper function that sends a Slack message in a standard format.

Prepare the Jenkins integration for Slack

Before starting, we need to configure Slack with Jenkins CI app so that it can receive messages from Jenkins:

  1. On Slack, click Apps, search for Jenkins CI, then click Add:

    Figure 10.8 – Add the Jenkins...