kubespray/inventory/sample/group_vars/all/gcp.yml

## GCP compute Persistent Disk CSI Driver credentials and parameters
## See docs/gcp-pd-csi.md for information about the implementation

## Specify the path to the file containing the service account credentials
# gcp_pd_csi_sa_cred_file: "/my/safe/credentials/directory/cloud-sa.json"

## To enable GCP Persistent Disk CSI driver, uncomment below
# gcp_pd_csi_enabled: true
# gcp_pd_csi_controller_replicas: 1
# gcp_pd_csi_driver_image_tag: "v0.7.0-gke.0"