GCS bucket region detection from Ansible (from a GCP host)

gcs_region_tasks.yaml

- name: Since we don't have a region for GCP, get the token from the metadata service
  ansible.builtin.uri:
    url: "http://169.254.169.254/computeMetadata/v1/instance/service-accounts/default/token"
    headers:
      Metadata-Flavor: Google
      Accept: "application/json"
    return_content: yes
  register: gcp_token

- name: Fetch the region for the bucket from the GCS API
  ansible.builtin.uri:
    url: "https://storage.googleapis.com/storage/v1/b/{{ backup_gcs_bucket }}?alt=json&fields=metageneration%2ClocationType%2CstorageClass%2Clocation&projection=full"
    headers:
      Authorization: "Bearer {{ gcp_token.json.access_token }}"
      Accept: "application/json"
    return_content: yes
  register: gcs_bucket_info

- name: Get the region from the GCS bucket info
  ansible.builtin.set_fact:
    backup_s3_region: "{{ gcs_bucket_info.json.location }}"