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GCP PCA · Question 44 · Technical Processes
Your team wants to deploy a new version of a critical application. They want to minimize risk by routing only 5% of user traffic to the new version initially, monitoring it for errors, and then gradually increasing the traffic to 100%. If errors occur, they want to instantly route all traffic back to the old version. Which TWO deployment strategies support this requirement? (Select TWO)
Your team wants to deploy a new version of a critical application. They want to minimize risk by routing only 5% of user traffic to the new version initially, monitoring it for errors, and then gradually increasing the traffic to 100%. If errors occur, they want to instantly route all traffic back to the old version. Which TWO deployment strategies support this requirement? (Select TWO)
Answer options:
A.
Rolling update
B.
Canary deployment
C.
Blue/Green deployment with traffic splitting
D.
In-place deployment
E.
A/B testing
How to approach this question
Identify deployment strategies that utilize traffic routing to mitigate risk.
Full Answer
Canary deployment, Blue/Green deployment with traffic splitting
Canary deployments route a small subset of traffic to a new version to monitor for issues. Blue/Green deployments (when combined with traffic splitting via a Load Balancer or Istio) allow you to spin up the new version alongside the old, route 5% of traffic to it, and instantly revert the router to 100% old if things go wrong.
Common mistakes
Selecting A/B testing (E). While it uses traffic splitting, its purpose is business analytics, not deployment risk mitigation.
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