DevOps stands for Development and Operations, which refers to the combination of software development and IT operations. This originated from the practice of Agile methodologies in development teams and allows for faster development, eliminating areas of fricition.

Areas and Characteristics

Agile workflow
- Simplicity and Automation are key to a strong development team
Use of CI/CD systems for fast feedback loops
Monitoring
- Use of product-wide logging and metrics for improvement of operations
Infrastructure as Code (IaC)
- Use of Infrastructure as a Service (IaaS) Platforms and configuration files
Microservices
Policy as Code (PaC)
Monitoring

Implementation

During development, follow Software Development Practices
Implement CI/CD
- Originates from XP
- Work in small batches and units. Not the fastest for large features, but it ensures testing well.

Tips

Development Practices

Reorganize the teams to be cross-functional, removing silos and flattening heirarchies to allow for innovation.
Foster a DevOps work culture, where lines between developer and operation jobs are blurred.
Get acquainted with Software Development Practices like DDD, TDD and BDD
Practice test-driven development to always keep the code deployable
- Maintain an automated test suite.
- Build monitoring, logging and fault tolerance by design
- In Behaviour Driven Development, tests are a byproduct of systematic thinking
- Keep the boy scout mentality - always leave the code better than you found it
Work in small features
- Feature branches should live no longer than a day
- For longer features, use feature flags
Transition to Microservices when it gives more performance than monoliths

Feedback loop

When master is broken in CI, drop everything and fix it. Keep a "no broken windows" policy

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