mount.nfs: requested NFS version or transport protocol is not supported

错误信息说明需求的nfs版本或传输协议不支持，意思是服务器端的nfs版本和客户端的nfs版本不同，百度发现网上都说该错误是内核配置有问题引发的，说是内核配置没有启用nfs导致。但是始终没有找到网上所说的修改内核配置的方法。

服务端

[root@nfs01 ~]# nfsstat -s   查看版本信息
Server rpc stats:
calls      badcalls   badclnt    badauth    xdrcall
8          48         0          48         0       

Server nfs v4:
null         compound     
8       100% 0         0% 

Server nfs v4 operations:
op0-unused   op1-unused   op2-future   access       close        commit       
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
create       delegpurge   delegreturn  getattr      getfh        link         
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
lock         lockt        locku        lookup       lookup_root  nverify      
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
open         openattr     open_conf    open_dgrd    putfh        putpubfh     
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
putrootfh    read         readdir      readlink     remove       rename       
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
renew        restorefh    savefh       secinfo      setattr      setcltid     
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
setcltidconf verify       write        rellockowner bc_ctl       bind_conn    
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
exchange_id  create_ses   destroy_ses  free_stateid getdirdeleg  getdevinfo   
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
getdevlist   layoutcommit layoutget    layoutreturn secinfononam sequence     
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
set_ssv      test_stateid want_deleg   destroy_clid reclaim_comp 
0         0% 0         0% 0         0% 0         0% 0         0% 

[root@nfs01 ~]# 
[root@nfs01 ~]# 
[root@nfs01 ~]# cat /etc/exports
/data  172.16.1.8(rw)
[root@nfs01 ~]# ll -d /data/
drwxr-xr-x 2 nfsnobody nobody 6 Jan 10 04:00 /data/
[root@nfs01 ~]# id nfsnobody
uid=65534(nfsnobody) gid=65534(nfsnobody) groups=65534(nfsnobody)
[root@nfs01 ~]# rpm -qa nfs-utils
nfs-utils-1.3.0-0.65.el7.x86_64

客户端

[root@localhost ~]# mount -t nfs 172.16.1.31:/data  /mnt
mount.nfs: requested NFS version or transport protocol is not supported
[root@localhost ~]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        47G  1.4G   46G   3% /
devtmpfs                devtmpfs  475M     0  475M   0% /dev
tmpfs                   tmpfs     487M     0  487M   0% /dev/shm
tmpfs                   tmpfs     487M  7.6M  479M   2% /run
tmpfs                   tmpfs     487M     0  487M   0% /sys/fs/cgroup
/dev/sda1               xfs      1014M  133M  882M  14% /boot
tmpfs                   tmpfs      98M     0   98M   0% /run/user/0
[root@localhost ~]# 
[root@localhost ~]# 
[root@localhost ~]# nfsstat -s   查看版本信息
Error: No Server Stats (/proc/net/rpc/nfsd: No such file or directory). 
[root@localhost ~]# nfsstat -c
Client rpc stats:
calls      retrans    authrefrsh
24         32         24      

Client nfs v4:
null         read         write        commit       open         open_conf    
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
open_noat    open_dgrd    close        setattr      fsinfo       renew        
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
setclntid    confirm      lock         lockt        locku        access       
12       75% 0         0% 0         0% 0         0% 0         0% 0         0% 
getattr      lookup       lookup_root  remove       rename       link         
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
symlink      create       pathconf     statfs       readlink     readdir      
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
server_caps  delegreturn  getacl       setacl       fs_locations rel_lkowner  
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
secinfo      exchange_id  create_ses   destroy_ses  sequence     get_lease_t  
0         0% 0         0% 4        25% 0         0% 0         0% 0         0% 
reclaim_comp layoutget    getdevinfo   layoutcommit layoutreturn getdevlist   
0         0% 0         0% 0         0% 0         0% 0         0% 0         0% 
(null)       
0         0% 

[root@localhost ~]# mount -t nfs 172.16.1.31:/data  /mnt
mount.nfs: requested NFS version or transport protocol is not supported

[root@localhost ~]# rpm -qa nfs-utils
nfs-utils-1.3.0-0.65.el7.x86_64

最后对比软件包都是一样的，报错还是说传输协议版本不对应。