docs: def _tag_ebs(self, conn, role):
          """ set tags, carrying the cluster name, instance role and instance id for the EBS storage """
          tags = {'Name': 'spilo_' + self.cluster_name, 'Role': role, 'Instance': self.instance_id}
          volumes = conn.get_all_volumes(filters={'attachment.instance-id': self.instance_id})
          conn.create_tags([v.id for v in volumes], tags)