https://blog.wongcw.com/2019/03/07/ni-distributed-system-manager-2018%ef%bc%88%e5%90%ab%ef%bc%9a%e8%a8%bb%e5%86%8a%e6%a9%9f%e5%ba%8f%e5%88%97%e8%99%9f%ef%bc%89/