List<DnsRecordSpec> ipv4 = Lists.newArrayList();
List<DnsRecordSpec> ipv6 = Lists.newArrayList();
for (LbaasServerData server : repository.getServers(project).list()) {
String ip = server.getIp();
DnsRecordSpec record = new DnsRecordSpec();
record.address = ip;
InetAddress address = InetAddresses.forString(ip);
if (address instanceof Inet6Address) {
ipv6.add(record);