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DevOps Intermediate

What is Jenkins?

An open-source automation server for building, testing, and deploying software through configurable CI/CD pipelines.

Jenkins is the most widely used CI/CD server. Pipelines are defined in Jenkinsfiles (Groovy-based DSL) with stages like Build, Test, and Deploy. Jenkins supports thousands of plugins for integration with virtually any tool.

Features include distributed builds (master/agent architecture), pipeline-as-code, Blue Ocean UI, shared libraries, and extensive plugin ecosystem. While newer tools (GitHub Actions, GitLab CI) offer simpler setup, Jenkins remains dominant in enterprise environments.

Related Terms

Semantic Versioning
A versioning scheme using MAJOR.MINOR.PATCH numbers that communicates the nature of changes in each release.
Microservices
An architectural style where an application is composed of small, independent services that communicate over APIs.
Health Check
An endpoint or mechanism that reports whether an application is running correctly and ready to handle requests.
Makefile
A file containing build rules and commands that automates compilation and common project tasks using the make utility.
Kubernetes
An open-source container orchestration platform that automates deploying, scaling, and managing containerized applications.
Infrastructure as Code (IaC)
The practice of managing infrastructure through machine-readable configuration files rather than manual processes.
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