SDET Interview Preparation - Docker

1. Introduction to Jenkins:

Jenkins is an open-source automation server that enables engineers to build, test, and deploy their software. It is widely used for implementing Continuous Integration (CI) and Continuous Deployment (CD) pipelines.

Understand what Jenkins is, its purpose, and why it's used in CI/CD.

2. Jenkins Installation and Setup:

This involves downloading Jenkins, installing it on your system, and performing initial setup tasks like unlocking Jenkins, customizing Jenkins plugins, creating the first admin user, and configuring the instance.

Learn how to install Jenkins and set it up on your system.

3. Understanding Jenkins Dashboard:

The Jenkins dashboard is the primary user interface of Jenkins. It provides access to all the jobs, build history, system configuration, and more.

Familiarize yourself with the Jenkins dashboard and its various elements.

4. Creating and Configuring Jenkins Jobs:

Jobs are the runnable tasks that are controlled by Jenkins.

Learn how to create a new job, configure its settings, and understand different job types.

5. Jenkins Build Triggers:

Build triggers define when to run a job. They can be manual, scheduled (using cron syntax), or triggered by other jobs or events.

Understand different ways to trigger a Jenkins build, such as manual triggering, scheduled builds, and triggering by other builds.

6. Jenkins Pipelines:

A Jenkins pipeline is a suite of Jenkins plugins that supports implementing and integrating CD pipelines. The Jenkinsfile, written in Groovy, defines the pipeline stages and steps.

Learn about Jenkins pipelines, how to create a Jenkinsfile, and understand the difference between declarative and scripted pipelines.

7. Using Jenkins with Git:

Jenkins can integrate with Git to pull the source code for building and deploying. This involves configuring Git in Jenkins and setting up webhooks for automatic triggering.

Understand how to integrate Jenkins with Git for version control.

8. Jenkins Plugins:

Plugins extend Jenkins' functionality. There are numerous plugins for integrating with different tools, UI enhancements, adding build steps, and more.

Learn about various Jenkins plugins and how to install and use them.

9. Jenkins Nodes and Distributed Builds:

Jenkins can distribute build tasks across multiple machines, improving performance and speed. This involves setting up master and slave nodes.

Understand the concept of Jenkins nodes, master and slave configuration, and how to distribute builds across multiple machines.

10. Securing Jenkins:

Jenkins security involves managing users, their permissions, securing the Jenkins server, and encrypting sensitive data.

Learn about various security aspects of Jenkins, such as setting up user authentication and authorization, and securing the Jenkins server.

11. Jenkins for CI/CD:

Jenkins is a key tool in CI/CD, automating the building, testing, and deployment of applications. It ensures code changes are reliable and ready to deploy.

Understand how Jenkins fits into a Continuous Integration/Continuous Deployment (CI/CD) pipeline.

12. Jenkins with Docker:

Docker can be used with Jenkins to create isolated environments for building and testing applications. This involves creating Docker images and containers.

Learn how to integrate Jenkins with Docker for containerization.

13. Troubleshooting Jenkins:

Common issues can include build failures, plugin issues, configuration errors, and more. Learn how to identify and resolve these issues.

Learn about common issues in Jenkins and how to troubleshoot them.

14. Best Practices:

These include regularly backing up Jenkins data, avoiding building on the master node, securing Jenkins, and keeping plugins updated.

Learn the best practices for using Jenkins, such as backing up Jenkins data, not building on the master, and securing Jenkins.

15. Advanced Jenkins Concepts:

These include creating parameterized builds (jobs with multiple configurations), using shared libraries for common code, and using Jenkins Job DSL for job configuration as code.

Cover advanced topics like parameterized builds, shared libraries, and Jenkins Job DSL.

You can also connect with me to upskill in Jenkins for CI/CD through personalized long-term mentorship on Preplaced.

You can book a free trial session on Preplaced!