Google Professional Cloud Network Engineer Question 445
Single answerGoogle Cloud PlatformYou are deploying a new version of your application on Google Cloud and want to perform a gradual rollout to test the new changes with only 20% of user traffic initially. You are using an Application Load Balancer to manage your application traffic. How can you configure traffic splitting to achieve this?
- A
Configure a URL map to split traffic between two backend services, assigning 80% of traffic to the existing backend service and 20% to the new backend service.
- B
Enable Cloud CDN and use caching rules to route 20% of traffic to the new backend service.
- C
Set up traffic mirroring to duplicate 20% of the traffic to the new backend service while keeping the original backend service active.
- D
Use a firewall rule to limit traffic to 20% for the new backend service.
Show answer and explanation
Correct answer: A
Explanation
To gradually roll out a new version of an application using Google Cloud's Application Load Balancer, traffic splitting can be configured by using a URL map to distribute traffic between backend services. By assigning percentages to each backend service in the URL map, you can control how much traffic is directed to the new version without impacting all users at once. Other options, such as Cloud CDN and traffic mirroring, do not provide traffic splitting functionality.
- A. Correct.
This is correct. Traffic splitting with an Application Load Balancer can be achieved by configuring a URL map to distribute traffic between backend services based on percentages.
- B. Incorrect.
This is incorrect. Cloud CDN is used for caching content and does not support traffic splitting between backend services.
- C. Incorrect.
This is incorrect. Traffic mirroring duplicates traffic for testing or monitoring, but it does not split traffic between backend services.
- D. Incorrect.
This is incorrect. Firewall rules manage network access and cannot control traffic percentages for specific backend services.