Blue/green versus canary deployments
WHAT IT TESTS: deployment-strategy fluency. OUTLINE: blue/green flips all traffic between two full environments; canary shifts a small slice gradually while watching metrics. RED FLAG: confusing the two or ignoring cost, rollback, and observability trade-offs.
WHAT IT TESTS: whether you understand release risk control. ANSWER OUTLINE: blue/green keeps two identical environments and switches all traffic at once, giving instant rollback but double infrastructure; canary routes a small percentage to the new version, expands as metrics stay healthy, limiting blast radius but needing strong observability and traffic-splitting support. In PaaS, weigh cost of duplicate environments, rollback speed, and the monitoring required to judge a canary.
Read the original → interview
- #deployments
- #blue-green
- #canary
- #paas
- #release-strategy
Get five bites like this every day.
Tezvyn delivers a daily feed of 60-second tech bites with quizzes to lock in what you learn.