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What is Pipeline as Code?

Defining CI/CD pipeline configurations as version-controlled code files rather than through UI-based pipeline builders.

Pipeline as Code stores build, test, and deployment pipeline definitions in the same repository as application code. Examples include Jenkinsfile (Jenkins), .github/workflows/*.yml (GitHub Actions), .gitlab-ci.yml (GitLab), and azure-pipelines.yml (Azure DevOps). Benefits include version history of pipeline changes, code review for pipeline modifications, branch-specific pipeline variations, and reproducibility. Pipelines typically define stages (build, test, deploy), steps within stages, environment variables, triggers (push, PR, schedule), and conditions. Treating pipelines as code enables the same engineering practices (review, testing, rollback) applied to application development.

Related Terms

Container Registry
A storage and distribution service for container images, similar to a package repository but for Docker images.
ArgoCD
A declarative GitOps continuous delivery tool for Kubernetes that automatically syncs cluster state with Git repositories.
Nginx
A high-performance web server and reverse proxy known for its stability, low resource usage, and ability to handle many concurrent connections.
API Gateway
A server that acts as the single entry point for API requests, handling routing, authentication, rate limiting, and monitoring.
Blue-Green Deployment
A deployment strategy using two identical environments where traffic is switched from the old version to the new one instantly.
Incident Management
The process of detecting, responding to, and resolving service disruptions to minimize impact and restore normal operations.
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