在k8s中搭建nfs服务器，用于持久化

https://my.oschina.net/u/2306127/blog/1833285?from=groupmessage

nfs的使用：https://blog.csdn.net/weixin_36171533/article/details/82627920

http://redisdoc.com/topic/cluster-tutorial.html#id10

https://www.cnblogs.com/mxf97826/p/8687664.html