code: public static void createGobblinHelixCluster(
        String zkConnectionString,
        String clusterName,
        boolean overwrite) {
      ClusterSetup clusterSetup = new ClusterSetup(zkConnectionString);
      // Create the cluster and overwrite if it already exists
      clusterSetup.addCluster(clusterName, overwrite);
      // Helix 0.6.x requires a configuration property to have the form key=value.
      String autoJoinConfig = ZKHelixManager.ALLOW_PARTICIPANT_AUTO_JOIN + "=true";
      clusterSetup.setConfig(HelixConfigScope.ConfigScopeProperty.CLUSTER, clusterName, autoJoinConfig);
    }
docs: Create a Helix cluster for the Gobblin Cluster application.
  
  @param zkConnectionString the ZooKeeper connection string
  @param clusterName the Helix cluster name
  @param overwrite true to overwrite exiting cluster, false to reuse existing cluster