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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

Git
A distributed version control system that tracks changes in source code during software development.
Trunk-Based Development
A source control strategy where developers integrate small changes directly into the main branch frequently, often multiple times per day.
Microservices
An architectural style where an application is composed of small, independent services that communicate over APIs.
Kubernetes Secret
A Kubernetes object for storing sensitive data like passwords, tokens, and certificates, with base64 encoding and optional encryption at rest.
Helm
A package manager for Kubernetes that simplifies deploying and managing applications using reusable, configurable charts.
Container Registry
A storage and distribution service for container images, similar to a package repository but for Docker images.
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