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GCP Associate Cloud Engineer Practice Question

Your team is migrating a GKE workload from service-account key files to Workload Identity. You have:

  • Enabled Workload Identity on the cluster.
  • Created the Google service account data-reader@PROJECT_ID.iam.gserviceaccount.com.
  • Annotated the Kubernetes service account default/ksa-reader with iam.gke.io/gcp-service-account=data-reader@PROJECT_ID.iam.gserviceaccount.com.

After redeploying, pods still receive "403 Permission denied" when calling Cloud Storage. What additional step is required so the pods can successfully authenticate as the Google service account?

  • Create a JSON key for the Google service account and mount it into the pods as a secret.

  • Grant the Kubernetes service account the Storage Object Viewer role on the target Cloud Storage bucket.

  • Add an IAM policy binding that grants the roles/iam.workloadIdentityUser role on the Google service account to default/ksa-reader.

  • Enable the IAM Credentials API in the project that hosts the cluster.

GCP Associate Cloud Engineer
Configuring access and security
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