Shift-Right

Định nghĩa

Test in production — observe real users, run experiments live.

Practices shift-right

• Feature flag rollout — gradual exposure (1% → 5% → 50% → 100%).
• Canary deployment — new version to 1 server, monitor.
• A/B testing — variant comparison.
• Chaos engineering — inject failure intentionally (Netflix Chaos Monkey).
• Synthetic monitoring — bot run critical user journey 24/7.
• Real user monitoring (RUM) — track actual user behavior.
• Error tracking — Sentry, Crashlytics capture exception.
• Distributed tracing — Jaeger, Honeycomb trace request flow.

Shift-right + shift-left = "test everywhere"

• Shift-left catch bug pre-prod.
• Shift-right catch bug prod-fast and recover.
• Loop: prod feedback → improve test → catch earlier.

SRE collaboration

QA + SRE/DevOps share on-call. Incidents → post-mortem → test added.

Production-safe testing

• Read-only: synthetic monitoring, RUM.
• Write but recoverable: test transaction marked as test (skip in reports).
• Destructive: chaos engineering chỉ trong "game day" scheduled.

VN context

Banking, payment app phải có shift-right vì regulatory không cho phép down dài. SBV expect MTTR < 1h.

Tools VN team dùng

• Sentry (error tracking).
• DataDog / NewRelic (APM).
• Grafana + Prometheus (metric).
• PagerDuty / Opsgenie (incident).