nfs正常挂载后，新加了一块阿里oss磁盘，报如下错误
mount.nfs: access denied by server while mounting 10...**:/app/im_attach/
解决办法，在nfs客户端vim /etc/exports添加fsid=0
/app/im_attach *(fsid=0,insecure,rw,sync,insecure,no_subtree_check,no_root_squash)
执行exportfs -r，在进行挂载即可解决
