Why it matters

CI/CD is the technical backbone of modern software delivery. Understanding enables fast, safe deploys.

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The architecture

Pipeline: commit → build → test → package → deploy stages.

Tools: GitHub Actions, GitLab CI, Jenkins, CircleCI, Argo CD.

CI/CD pipeline stagesCommittrigger pipelineBuild + testautomatedDeploymanual or autoCD promotes tested builds; Continuous Deployment automates final step
Pipeline stages.
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How it works end to end

Feature branches: PR triggers pipeline. Merge requires green build.

Environments: dev → staging → prod. Progression as tests pass.

Rollback: fast rollback mechanism. Argo Rollouts, feature flags.

Progressive delivery: canary, blue-green, feature flags for safe rollout.