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GCP Associate Cloud Engineer Practice Question

Your team is deploying a container on Cloud Run that must publish messages to Pub/Sub. The container code runs unattended and must authenticate without embedding user credentials. Central security mandates that the identity used can be tracked in IAM, rotates automatically, and can be limited to only the Pub/Sub Publisher role. Which identity design best meets these requirements when the container calls the Pub/Sub API?

  • Create a separate Gmail account for the application, enable 2-step verification, generate an OAuth token, and store the token as a secret in Cloud Run.

  • Create a dedicated service account, grant it the Pub/Sub Publisher role, and set it as the runtime service account for the Cloud Run service.

  • Let the Cloud Run service inherit the personal Google account of the engineer who deploys it, since that user already has Editor permissions.

  • Grant the Pub/Sub Publisher role to a Google Group of developers and configure the container to authenticate using the group's email address at runtime.

GCP Associate Cloud Engineer
Configuring access and security
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