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

Inside the Groovy sandbox

All other pipelines run inside the Groovy sandbox:

  • A direct pipeline with Use Groovy Sandbox checked
  • A pipeline from SCM, multibranch pipeline, or any other pipeline type that loads a Jenkinsfile
  • A folder-level shared library

An approval process for inside the sandbox is for each method signature, as opposed to the entire script as a whole. Let's go back to the destroyer script that we saw in the introduction and run it inside the sandbox. The build fails this time with a different error message:

15:50:28  Started by user subtractor-admin
[...]
15:50:30  Scripts not permitted to use staticMethod jenkins.model.Jenkins getInstance. 
Administrators can decide whether to approve or reject this signature.
[...]
15:50:30  Finished: FAILURE

When an administrator checks the Script Approval page, only the specific signature of the method is pending for a review...