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HomeDesigning and Implementing Microsoft DevOps Solutions (AZ-400)Deployment resiliency — quick notes
Quick Notes87 words

Deployment resiliency — quick notes

Deployment resiliency — quick notes

NeedMechanism
Detect real-world failurepostRouteTraffic health checks
Automatic reversalon: failure steps
Fast manual reversalSlot swap back, or feature flag off
Limit exposure firstCanary / rolling
Prevent concurrent deploysExclusive lock check

Key pairing: postRouteTraffic is what makes on: failure meaningful — it measures health under real traffic.

Trap: non-idempotent deployment scripts. Retries mean a step may run twice.

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