Continuous Integration & Continuous Delivery/Deployment (CI/CD) Explained
Continuous Integration & Continuous Delivery/Deployment (CI/CD) Explained
CI/CD stands for continuous integration and continuous delivery or continuous deployment. These are modern software development practices in which code is automatically tested, built and rolled out.
CI/CD helps teams develop faster and more reliably – from small projects to large enterprise systems.
What Is Continuous Integration (CI)?
Continuous integration means that developers merge their code into a central repository on a regular basis. After every commit, an automated check verifies whether the code:
- compiles
- passes its tests
- meets the quality rules
That way, defects surface early instead of in the production system.
What Is Continuous Delivery (CD)?
Continuous delivery extends CI with an automated release process. Once the tests pass, the code is deployed automatically – to a staging or test server, for example.
The final step into production is performed manually.
What Is Continuous Deployment?
Continuous deployment goes one step further: as soon as the tests pass, the application is deployed to production automatically.
This requires high test coverage and stable processes.
CI/CD Is an Entire Ecosystem Today
CI/CD is not a single tool but a combination of:
- CI systems for testing and building code
- CD systems for delivery and versioning
- Deployment platforms for the actual hosting and rollout
- Container and cloud technologies such as Docker and Kubernetes
Which solution you use depends on the size of the project.
Enterprise CI/CD Platforms
| Vendor | Tool | Description |
|---|---|---|
| Microsoft | Azure DevOps / GitHub Actions | Complete DevOps suite including CI/CD |
| Google Cloud Build / Deploy | Container- & Kubernetes-focused | |
| AWS | CodePipeline / CodeBuild | CI/CD integrated directly into AWS |
| GitLab | GitLab CI/CD | Pipeline built into the repo workflow |
| Jenkins | Jenkins | Flexible & self-hosted |
Modern Deployment Platforms
These tools are especially strong when it comes to hosting & delivery:
- Dokploy – self-hosted PaaS for Docker deployments
- Coolify – open source alternative with multi-environment support
- CapRover – straightforward Docker deployment
- Vercel / Netlify – CI/CD for front-end deployments
These tools do not replace a CI pipeline – they complement it.
Container & GitOps Systems
- Docker – the standard for containerization
- Kubernetes – scaling & orchestration for large projects
- ArgoCD / FluxCD – GitOps delivery engines
CI/CD for Small Projects
- GitHub Actions or GitLab CI
- Deployment via Dokploy / Coolify
Goal: deploy quickly and pragmatically.
CI/CD for Mid-Sized Projects
- Multi-stage pipeline
- Staging + production
- Deployment with Docker
Goal: stability and control.
CI/CD for Large Projects
- Kubernetes deployments
- GitOps with ArgoCD
- Blue-green or canary releases
- Enterprise toolchains (Azure DevOps, AWS, GitLab)
Goal: scalability, security and resilience.
Conclusion
CI/CD is the standard for modern software development today. While established tools such as Azure DevOps or GitLab CI model complex pipelines, platforms like Dokploy or Coolify offer a fast route to containerized deployments. Large projects rely on Kubernetes and GitOps, while small and mid-sized ones benefit from simple automation with modern deployment tools.