Exam Professional Cloud Developer topic 1 question 86 discussion

The best answer is D. During each instance launch, configure an instance custom-metadata key named ‘environment’ whose value is the environment the instance serves. Use your deployment tool to query the instance metadata, and configure the application based on the ‘environment’ value. Here's why: Simplicity and Efficiency: This approach is the most straightforward and efficient. It leverages existing Compute Engine features (custom metadata) and avoids the need for additional scripts or deployment tools. Centralized Configuration: Custom metadata is associated with the instance itself, making it a centralized and reliable source of environment information. Flexibility: Your deployment tool can easily query the instance metadata during deployment, allowing you to dynamically configure the application based on the environment.

https://cloud.google.com/compute/docs/metadata/setting-custom-metadata#set-custom-project-wide-metadata

Option B is correct we usually put this details in Environment variable.

Option A, configuring a startup script using the gcloud command to determine the project name, is not a feasible solution because it requires additional steps to be taken during instance launch. Option C, deploying a deployment tool on an instance in each project and using a deployment job to retrieve the appropriate configuration file, is not a feasible solution because it requires additional steps to be taken during instance launch and involves the use of a separate deployment tool. Option D, configuring an instance custom-metadata key named "environment" during each instance launch, is not a feasible solution because it requires additional steps to be taken during instance launch.

B is the answer. https://cloud.google.com/compute/docs/metadata/setting-custom-metadata#set-custom

https://cloud.google.com/compute/docs/metadata/querying-metadata

B is correct

Vote B

Answer should be B

D, 'environment' is not in one of the default key https://cloud.google.com/compute/docs/metadata/default-metadata-values

For Answer D : Question says minimize steps and adding metadata to each instance seems longer route ?

I vote B