def get_head_node_root_volume_tags(cluster, os):
    "Return the given cluster's head node's root volume's tags."
    head_node_instance_id = get_head_node_instance_id(cluster)
    root_volume_id = get_root_volume_id(head_node_instance_id, cluster.region, os)
    return get_tags_for_volume(root_volume_id, cluster.region)
Return the given cluster's head node's root volume's tags.
def get_head_node_root_volume_tags(cluster, os):
    
    head_node_instance_id = get_head_node_instance_id(cluster)
    root_volume_id = get_root_volume_id(head_node_instance_id, cluster.region, os)
    return get_tags_for_volume(root_volume_id, cluster.region)