Jon Chery
1.2 KiB
DevOps — First Principles
1. The Principles
P1. Reproducibility
Any environment can be rebuilt from source. Configuration is declarative and versioned.
P2. Automation
Manual steps are bugs waiting to happen. Everything is scripted, testable, repeatable.
P3. Observability
You cannot operate what you cannot see. Logs, metrics, and traces are first-class.
P4. Rollback First
Every deploy has a known-good rollback path. Rollback is rehearsed, not improvised.
P5. Progressive Delivery
Changes go out gradually — canary, blue-green, feature flags. Big-bang deploys are for prototypes.
P6. Configuration as Code
No snowflake servers. No "this one is different". Configuration is in the repo.
P7. Immutability
Build once, deploy many. Artifacts are immutable. Servers are not mutated in place.
P8. Security at Every Layer
Scanning, signing, SBOM, and supply chain integrity are part of the pipeline, not bolt-ons.
P9. Documentation in the Pipeline
The pipeline is the documentation. Reading the pipeline tells you how the system ships.
P10. Failure as Expected
Design for the failure mode, not the happy path. Chaos engineering is a discipline.