Jenkins Training — Pipeline Automation, Jenkinsfile, Shared Libraries & Enterprise CI/CD

What Is Jenkins?

Jenkins is the most widely deployed open-source CI/CD automation server, with over 1,800 plugins and 300,000+ active installations worldwide. Jenkins Pipeline (Jenkinsfile) enables Pipeline as Code — defining your entire build, test, and deployment workflow in a version-controlled DSL. Despite growing competition from GitHub Actions and GitLab CI, Jenkins remains the backbone of CI/CD in enterprises due to its flexibility, plugin ecosystem, and the massive existing investment in Jenkins infrastructure.

Current Relevance

Jenkins is a first-class CI/CD platform — still the market leader by install base. However, organizations are increasingly evaluating GitHub Actions for greenfield projects due to tighter GitHub integration and lower operational overhead. This course teaches Jenkins deeply for engineers who need to build and maintain Jenkins pipelines today, while also covering Jenkins→GitHub Actions migration patterns for teams planning their CI/CD evolution.

Who Should Attend

• DevOps engineers building and maintaining Jenkins infrastructure
• Build/release engineers migrating from freestyle jobs to Pipeline as Code
• Software engineers who want to own their CI/CD pipelines
• Teams evaluating Jenkins vs. GitHub Actions

Learning Outcomes

• Write declarative and scripted Jenkins pipelines (Jenkinsfile) for real-world applications
• Build reusable shared libraries for pipeline standardization across teams
• Manage Jenkins at scale — agent architecture, security, backup, monitoring, performance
• Integrate Jenkins with Docker, Kubernetes, SonarQube, Nexus, and Terraform
• Implement Jenkins→GitHub Actions migration strategies

Course Modules

1. Jenkins Architecture — Master/agent model. Installation. Configuration as Code (JCasC). Home directory.
2. Declarative Pipeline — Stages, steps, when, post, environment, parameters, triggers. Blue Ocean.
3. Scripted Pipeline — Node, stage, checkout, sh/bat. Groovy scripting. When to use declarative vs. scripted.
4. Shared Libraries — Structure, global vs. folder-level. DRY pipeline code. Unit testing shared libraries.
5. Plugin Management — Essential plugins. Plugin compatibility. Security advisories. Minimizing plugin sprawl.
6. Jenkins Security — RBAC (Matrix, Role-Based, Project-Based). Credentials. CSRF. Audit logging. OWASP hardening.
7. Jenkins at Scale — Agent architecture (SSH, Docker, Kubernetes). Label-based routing. Throttling. Performance tuning.
8. Docker & Kubernetes Integration — Docker agents. Kubernetes plugin. Building containers in Jenkins. Helm deployment.
9. Quality & Artifact Integration — SonarQube quality gates. Nexus/Artifactory artifact upload. Test reporting.
10. Jenkins Administration — Backup/restore. Monitoring (Prometheus). JCasC for configuration. Disaster recovery.
11. Modernization: Jenkins to GitHub Actions — Pipeline mapping. Migration patterns. Coexistence. When to migrate.
12. Capstone: Enterprise Jenkins — Build a multi-team Jenkins with shared libraries, Docker agents, security, and monitoring.

Hands-on Labs (22 total)

Write a Jenkinsfile for a Java microservice (build → test → scan → containerize → deploy). Build a shared library for standardized pipeline stages. Configure Jenkins Kubernetes agent. Implement SonarQube quality gate with coverage thresholds. Plan a Jenkins→GitHub Actions migration with pipeline-by-pipeline mapping.

Enterprise Use Cases

• Operating Jenkins at scale: 500+ agents, 2,000+ jobs, 10,000+ builds/day
• Standardizing CI/CD across 50 teams with shared libraries and pipeline templates
• Planning Jenkins→GitHub Actions migration while maintaining production build stability

Related Courses

See DevOps Engineering, Java Build & Release, and Bamboo Training.