public CuratorFramework buildZk(List<String> dnsNames) throws OpsException {
String connectionString = Joiner.on(",").join(dnsNames);
Builder builder = CuratorFrameworkFactory.builder();
builder.connectString(connectionString);
TimeSpan retryInterval = TimeSpan.FIVE_SECONDS;
RetryPolicy retryPolicy = new RetryOneTime((int) retryInterval.getTotalMilliseconds());
builder.retryPolicy(retryPolicy);
CuratorFramework curatorFramework;