Five Best Practices for Applying DevOps in Real Projects

DevOps and continuous delivery are essential concepts for delivering valuable software to users, and they require serious attention to the DevOps mindset.

The author, a book writer on continuous delivery, presents five best practices for applying DevOps in real projects.

1. Test Automation

Automated testing enables safe releases without manual regression testing, but many organizations suffer from slow, low‑quality, expensive, and unreliable tests that hinder test case understandability and overall quality. A thorough automation strategy that tests every system behavior is recommended, allowing humans to focus on complex decision‑making.

2. Deployment Automation

Deployments should be achievable with a single button, ensuring repeatability and reliability. Understanding, declaring, and controlling environment variables and software dependencies is crucial, as is automating infrastructure and deployment tasks.

3. Trunk‑Based Development

Merging code changes to the main branch at least once daily improves throughput, stability, satisfaction, and reduces fatigue. Short‑lived branches (e.g., one‑day lifespan) and limiting active branches to three are key to high performance.

4. Security Left‑Shift

Embedding security tests and verification early in the deployment pipeline shortens feedback loops, allowing faster learning and more reliable releases. Security, compliance, scalability, and resilience should be considered alongside other release attributes.

5. Loose‑Coupled Architecture

Designing systems as independent, deployable modules enables changes to one part without testing the entire system, providing fast, efficient, high‑quality feedback. Alternatively, building, testing, and deploying everything together can be viable with sufficient pipeline investment.

These practices together form a comprehensive approach to achieving high‑performance, high‑quality software development through DevOps.