52 lines
2.0 KiB
Markdown
52 lines
2.0 KiB
Markdown
# Continuous Integration
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## Definition
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Continuous Integration (CI) is a DevOps practice where developers frequently merge their code changes into a shared repository, triggering automated builds and tests to detect integration issues early.
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## Key Characteristics
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### Across DevOps Maturity Levels
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| Maturity | CI Practice Level |
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|----------|-------------------|
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| Phase 1 | None — manual integration, siloed development |
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| Phase 2 | Introduction — version control for code and configurations |
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| Phase 3 | Automated builds and tests integrated into the development process |
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| Phase 4 | CI pipeline with automated quality gates, performance and load testing |
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| Phase 5 | Zero-touch CI pipeline with real-time data for decision making |
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### Core CI Elements
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- Automated builds triggered on every code commit
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- Automated unit, integration, and end-to-end tests
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- Static code analysis and security scans
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- Fast, reliable build pipelines
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- Immediate feedback to developers
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## Role in DevOps Maturity
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CI is a foundational DevOps practice. Organizations cannot advance to higher DevOps maturity without robust CI. At Phase 3+, CI is combined with continuous delivery (CD) to form CI/CD pipelines.
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Key progression:
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1. **Phase 2**: Version control introduction, superficial automation
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2. **Phase 3**: Most builds automated, security scans in the pipeline
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3. **Phase 4**: Immutable infrastructure managed through CI pipelines
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4. **Phase 5**: Zero human intervention — all code changes pass through automated pipeline
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## Metrics
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- Build success rate
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- Build frequency
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- Mean time to build
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- Code coverage percentage
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- Test pass rate
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- Time to first failure detection
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## Sources
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- [[sources/devops-maturity-model-from-traditional-it-to-advanced-devops.md]]
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- [[sources/cloud-devop-maturity-guideline.md]]
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## Related Concepts
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- [[concepts/CI-CD-Pipeline]]
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- [[concepts/Continuous-Deployment]]
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- [[concepts/DevOps-Maturity]]
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- [[concepts/Infrastructure-as-Code]]
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- [[concepts/DevSecOps]]
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