Book Image

The DevOps 2.4 Toolkit

By : Viktor Farcic
Book Image

The DevOps 2.4 Toolkit

By: Viktor Farcic

Overview of this book

Building on The DevOps 2.3 Toolkit: Kubernetes, Viktor Farcic brings his latest exploration of the Docker technology as he records his journey to continuously deploying applications with Jenkins into a Kubernetes cluster. The DevOps 2.4 Toolkit: Continuously Deploying Applications with Jenkins to a Kubernetes Cluster is the latest book in Viktor Farcic’s series that helps you build a full DevOps Toolkit. This book guides readers through the process of building, testing, and deploying applications through fully automated pipelines. Within this book, Viktor will cover a wide-range of emerging topics, including an exploration of continuous delivery and deployment in Kubernetes using Jenkins. It also shows readers how to perform continuous integration inside these clusters, and discusses the distribution of Kubernetes applications, as well as installing and setting up Jenkins. Work with Viktor and dive into the creation of self-adaptive and self-healing systems within Docker.
Table of Contents (12 chapters)
Now It Is Your Turn

Demystifying Declarative Pipeline through a practical example

Let's take a look at a Jenkinsfile.orig which we'll use as a base to generate Jenkinsfile that will contain the correct address of the cluster and the GitHub user.

 1  cat Jenkinsfile.orig

The output is too big for us to explore it in one go, so we'll comment on each section separately. The first in line is the options block.

options {
  buildDiscarder logRotator(numToKeepStr: '5')

The first option will result in only the last five builds being preserved in history. Most of the time there is no reason for us to keep all the builds we ever made. The last successful build of a branch is often the only one that matters. We set them to five just to prove that I'm not cheap. By discarding the old builds, we're ensuring that Jenkins will perform faster...