nfs build
https://www.cnblogs.com/lms0755/p/9211585.html
https://www.jianshu.com/p/e47cccbb3ae5
https://help.aliyun.com/knowledge_detail/125389.html#task-1130493
https://www.cnblogs.com/yueminghai/p/6473758.html
nfs monitor
https://blog.csdn.net/daocaoren1543169565/article/details/81013559
https://blog.csdn.net/onlyforcloud/article/details/48625841
mount configuration on the nfs
https://blog.csdn.net/lihuaichen/article/details/81077554
https://www.iteye.com/blog/icarusli-1181120