Jenkins

What It Is

A classic CI/CD server with pipelines, agents, and a very large plugin ecosystem.

Core Ideas

• controller and agent
• pipeline as code through Jenkinsfile
• freestyle jobs as the legacy model

Typical Stages

• checkout
• build
• test
• package
• deploy

Practice

• Watch plugin sprawl and security updates closely.
• For new projects, pipelines as code are almost always the better path.