private void maybeAddCluster() {
    for (Map.Entry<String, HelixAdmin> entry : adminForDc.entrySet()) {
      // Add a cluster entry in every DC
      String dcName = entry.getKey();
      HelixAdmin admin = entry.getValue();
      if (!isClusterPresent(dcName)) {
        info("Adding cluster {} in {}", clusterName, dcName);
        admin.addCluster(clusterName);
        info("Adding state model {} to cluster {}", stateModelDef, clusterName);
        admin.addStateModelDef(clusterName, stateModelDef, getStateModelDefinition(stateModelDef));
      }
    }
  }
Initialize a map of dataCenter to HelixAdmin based on the given zk Connect Strings.
ambry-clustermap/src/main/java/com/github/ambry/clustermap/HelixBootstrapUpgradeUtil.java