Question
What is a canary deployment?
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Answer
Release to a small subset of users/servers first. Monitor health metrics. If successful, gradually expand to all users. Rollback if issues detected.
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All Release Strategy & SRE Flashcards
Q: What is a canary deployment?
A: Release to a small subset of users/servers first. Monitor health metrics. If successful, gradually expand to all users. Rollback if issues detected.
Q: What are the four DORA metrics?
A: Deployment Frequency, Lead Time for Changes, Mean Time to Recovery (MTTR), and Change Failure Rate. They measure DevOps performance.
Q: What is an error budget?
A: The amount of unreliability allowed before SLO is breached. If error budget is consumed, the team prioritizes reliability over features.
Q: When should you use feature flags?
A: To decouple deployment from release, enable A/B testing, provide kill switches for features, and implement progressive rollouts without redeployment.
Q: What is a blameless postmortem?
A: An incident review focused on systemic causes rather than individual blame. Identifies improvements to processes, tooling, and monitoring.