1、使用ack 创建nas pvc 报错，如下:

mount -t nfs -o xxxxxx.......:/ /mnt 
mount: wrong fs type , bad option, bad superblock on xxxx missing codepage or helper program, or other error need a /sbin/mount. <type> helper program)

In some cases useful is found in syslog - try dmesg | tail or so . 

2、手动在ack 上挂载卷也报同样错误，后经排查是因为nfs-utils未安装

rpm -qa |grep nfs-utils
yum install nfs-utils -y 

3、nas挂载根据官方文档一般推荐使用v3