linux NFS

由于改了内核配置，以为是配置造成的问题；还原旧配置，还是NFS不能。在HOST端重启NFS服务器：

ywf@ubuntu:~$ sudo /etc/init.d/nfs-kernel-server restart

* Stopping NFS kernel daemon                                            [ OK ]

 * Unexporting directories for NFS kernel daemon...                      [ OK ]

 * Not starting NFS kernel daemon: no support in current kernel.

 

于是，就想是不是升级惹的祸。仔细看看，nfs-kernel-server由1.1.2变成1.2.0了。

GOOGLE到了https://bugs.launchpad.NET/ubuntu/+source/Linux/+bug/444458

原因很清楚：如果没有将NFS服务器作为模块运行，它就退出。解决的办法很简单，注释：

ywf@ubuntu:~$ sudo gedit /etc/init.d/nfs-kernel-server

66          # See if our running kernel supports the NFS kernel server

67          #if [ -f /proc/kallsyms ] && ! grep -qE 'init_nf(sd|    )' /proc/kallsyms; then

68          #    log_warning_msg "Not starting $DESC: no support in current kernel."

69          #    exit 0

70          #fi

 

启动NFS服务器：

ywf@ubuntu:~$ sudo /etc/init.d/nfs-kernel-server restart

 * Stopping NFS kernel daemon                                            [ OK ]

 * Unexporting directories for NFS kernel daemon...                         [ OK ]

* Exporting directories for NFS kernel daemon...                            [ OK ]

 * Starting NFS kernel daemon                                            [ OK ]

 

挂载测试下，OK：

ywf@ubuntu:~$ sudo mount -t nfs 192.168.74.130:/home/ywf/workdir/filesys/ /mnt

 

如果还是挂载失败，修改exports：

ywf@ubuntu:~$ sudo gedit /etc/exports

/home/ywf/workdir/filesys *(rw,sync,no_root_squash)