Jenkins 2: Up and Running summary

Understanding Jenkins 2

In Jenkins 2: Up and Running by Brent Laster, we begin by understanding the evolution of Jenkins from a Continuous Integration (CI) server to a Continuous Delivery (CD) automation hub. The book delves into the core concepts of Jenkins 2, highlighting the introduction of Pipeline as Code, a significant feature that allows you to define your build process in a Jenkinsfile, thus enabling the creation of more complex workflows compared to the traditional freestyle projects.

With this new understanding, we move on to explore the Jenkinsfile and its syntax, understanding how to define a pipeline, stages, and steps. The author provides examples of Jenkinsfiles, demonstrating how to handle common use cases such as parallel execution, error handling, and notifications. We also learn about the Jenkins Pipeline DSL and how it can be used to create custom steps and share them across different pipelines.

Creating Pipelines with Jenkins 2

Having grasped the basics, Jenkins 2: Up and Running then guides us through the creation of our first Pipeline. We explore the different ways of defining a pipeline, including the Scripted Pipeline and the Declarative Pipeline. The book provides detailed insights into the syntax and capabilities of each, allowing us to make an informed choice based on the complexity and requirements of our project.

Furthermore, the book introduces us to the Blue Ocean, a new user interface designed to make the creation and visualization of pipelines easier. We learn how to create and manage pipelines using this interface, taking advantage of its visual representation of the pipeline, its stages, and their execution status.

Extending Jenkins 2 Pipelines

Once we have a solid foundation in creating basic pipelines, Jenkins 2: Up and Running takes us into more advanced topics. We explore how to extend our pipelines by integrating with other tools such as version control systems, build tools, and testing frameworks. The book walks us through the process of setting up a pipeline that automatically triggers a build whenever a change is detected in our version control system.

In addition, we learn about the various ways to handle artifacts and dependencies within our pipeline. This includes archiving build artifacts, publishing test results, and managing dependencies using tools like Apache Maven and Docker. The book also covers the concept of pipeline libraries, allowing us to reuse and share common pipeline code across different projects.

Optimizing Jenkins 2 Pipelines

As we near the end of our journey with Jenkins 2: Up and Running, we focus on optimizing our pipelines for performance and reliability. We explore techniques for parallelizing our pipeline stages to reduce build times, as well as strategies for handling errors and failures gracefully. The book also emphasizes the importance of managing pipeline configurations as code, enabling us to version control and track changes to our pipeline definitions.

Furthermore, we learn about managing security and access control in Jenkins 2, ensuring that our pipelines are protected from unauthorized access and malicious attacks. The book provides best practices for securing Jenkins, including user authentication, authorization strategies, and the use of credentials and secrets.

Conclusion: Embracing Jenkins 2

In conclusion, Jenkins 2: Up and Running equips us with the knowledge and skills to fully leverage the power of Jenkins 2 for our Continuous Delivery needs. We gain a deep understanding of the Jenkinsfile and the Pipeline as Code concept, enabling us to create complex, maintainable, and scalable delivery pipelines. With this knowledge, we are well-prepared to embrace the DevOps culture and drive our software delivery process to new heights of efficiency and reliability.