What Does Cloud-Native Mean?
Cloud-native isn't just "running in the cloud." It's a set of principles for building applications that fully leverage cloud computing — elastic scaling, resilience, observability, and automation. It's about designing systems that embrace the distributed nature of modern infrastructure.
The Twelve-Factor App
The twelve-factor methodology provides a framework for building SaaS applications that are portable, scalable, and maintainable. Key principles include:
- Store config in environment variables, not code
- Treat backing services as attached resources
- Strictly separate build and run stages
- Export services via port binding
- Scale out via the process model
Infrastructure as Code
Define your infrastructure in version-controlled code using tools like Terraform, Pulumi, or AWS CDK. This ensures reproducibility, enables code review for infrastructure changes, and eliminates configuration drift.
Observability
In distributed systems, you can't just SSH into a server and tail logs. Invest in the three pillars of observability: structured logging, distributed tracing, and metrics. Tools like Grafana, Prometheus, and OpenTelemetry make this accessible.