挂载nfs提示：mount.nfs: access denied by server while mounting...

出现此类错误原因大致为：

权限问题
防火墙机制问题
共享配置文件问题

搭建好nfs服务后，在client端进行挂载时，提示：

[root@web1 media]# mount -t nfs 192.168.0.124:/server/tools/repo /media/centos/
mount.nfs: access denied by server while mounting 192.168.0.124:/server/tools/repo

查看了一下client端是否被占用了：

[root@web1 media]# mount -t nfs 192.168.0.124:/server/tools/repo /media/centos/
mount.nfs: access denied by server while mounting 192.168.0.124:/server/tools/repo
[root@web1 media]# mount
/dev/sda3 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw,rootcontext="system_u:object_r:tmpfs_t:s0")
/dev/sda1 on /boot type ext4 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)

发现并没有，然并卵。

接着就上server端查看/etc/exports配置文件：

[root@fenfa scripts]# cat /etc/exports
exporting 192.168.0.*:/server/tools/repo
exporting 192.168.0.*:/data

把192.168.0.24的/server/tools/repo共享给同一个网段的所有服务器，把IP格式规范为192.168.0.0/24或192.168.0.0/255.255.255.0

[root@fenfa scripts]# vim /etc/exports
[root@fenfa scripts]# exportfs -rv
exporting 192.168.0.0/24:/server/tools/repo
exporting 192.168.0.0/24:/data
[root@fenfa scripts]# showmount -e 127.0.0.1
Export list for 127.0.0.1:
/server/tools/repo 192.168.0.0/24
/data              192.168.0.0/24

我们再从client端上从新挂载：

[root@web1 media]# mount -t nfs 192.168.0.124:/server/tools/repo /media/centos/
[root@web1 media]# df -h
Filesystem                        Size  Used Avail Use% Mounted on
/dev/sda3                          19G  1.8G   16G  11% /
tmpfs                             491M     0  491M   0% /dev/shm
/dev/sda1                         194M   29M  155M  16% /boot
192.168.0.124:/server/tools/repo   19G  6.7G   11G  39% /media/centos

is ok!

如果卸载的时候提示： umount:/mnt:device is busy；解决方法：需要退出挂载目录再进行卸载，或者是否NFS server宕机了

[root@web1 nginx-1.6.3]# umount -t nfs 192.168.0.124:/server/tools/rep /media/centos/
umount: 192.168.0.124:/server/tools/rep: not found
umount.nfs: /media/centos: device is busy
[root@web1 nginx-1.6.3]# umount -t nfs 192.168.0.124:/server/tools/rep /media/centos/
[root@web1 nginx-1.6.3]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3        19G  1.9G   16G  11% /
tmpfs           491M     0  491M   0% /dev/shm
/dev/sda1       194M   29M  155M  16% /boot

需要强制卸载：mount –lf /mnt

此命令也可以：fuser –km /mnt 不建议用

转载于:https://www.cnblogs.com/su-root/p/11355486.html

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