apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/server/service/ServerClusterOpenApiService.java/ServerClusterOpenApiService/createCluster
class ServerClusterOpenApiService:  @Override
  public OpenClusterDTO createCluster(String env, OpenClusterDTO openClusterDTO) {
    ClusterDTO toCreate = OpenApiBeanUtils.transformToClusterDTO(openClusterDTO);
    ClusterDTO createdClusterDTO = clusterService.createCluster(Env.valueOf(env), toCreate);
    return OpenApiBeanUtils.transformFromClusterDTO(createdClusterDTO);
  }