kubespray/roles/kubernetes-apps/persistent_volumes/aws-ebs-csi/defaults/main.yml

---
# To restrict which AZ the volume should be provisioned in
# set this value to true and set the list of relevant AZs
# For it to work, the flag aws_ebs_csi_enable_volume_scheduling
# in AWS EBS Driver must be true
restrict_az_provisioning: false
aws_ebs_availability_zones:
  - eu-west-3c