Google Professional Cloud Network Engineer Question 447
Single answerGoogle Cloud PlatformYou are managing an e-commerce platform hosted on Google Cloud. The platform uses an Application Load Balancer to serve traffic globally. The development team wants to gradually roll out a new version of their backend service to 20% of the traffic while keeping the remaining 80% on the current version. How can you achieve this using the Application Load Balancer?
- A
Configure a traffic splitting rule in the backend service settings, allocating 20% of traffic to one backend service and 80% to another.
- B
Create two separate Application Load Balancers: one for the new version and one for the current version, and manually distribute traffic between them.
- C
Use URL maps to redirect 20% of requests to a different backend service with the new version.
- D
Set up traffic mirroring to replicate 20% of traffic to the new backend service for testing.
Show answer and explanation
Correct answer: A
Explanation
Traffic splitting is a feature of the Application Load Balancer in Google Cloud that allows you to distribute a specific percentage of live traffic to different backend services. This is particularly useful for canary deployments or gradual rollouts. Other options, such as using URL maps or traffic mirroring, serve different purposes and are not appropriate for this scenario.
- A. Correct.
Correct: Traffic splitting in the backend service settings allows you to allocate specific percentages of traffic to different backend services, making it suitable for gradual rollouts.
- B. Incorrect.
Incorrect: Creating two separate Application Load Balancers and manually distributing traffic is inefficient and not recommended for traffic splitting. Google Cloud provides built-in capabilities for this.
- C. Incorrect.
Incorrect: URL maps are used for routing traffic based on URL patterns or host headers, not for traffic splitting.
- D. Incorrect.
Incorrect: Traffic mirroring replicates traffic to another service for analysis or testing but does not serve the purpose of splitting live user traffic.