Exercises with NFSv4

NFSv4 exports exist in a single pseudo filesystem, , where the real directories are mounted with the --bind option.

Create the export filesytem on the NFS server (the node machine):

mkdir /export
mkdir /export/users

Create and mount the real users directory with /export/users :

mkdir /home/NFSv4
mount --bind /home/NFSv4 /export/users

To survive a reboot, the mount can be added into /etc/fstab

/home/NFSv4    /export/users   none    bind  0  0

In /etc/default/nfs-kernel-server we set:

NEED_SVCGSSD=no

In /etc/default/nfs-common on both the server and the client

NEED_IDMAPD=yes
NEED_GSSD=no

Restart /etc/init.d/nfs-common on both the server and the client:

/etc/init.d/nfs-common restart

Export the directories on the server: in /etc/exports, put

/export desktop01(rw,fsid=0,insecure,no_subtree_check,async)
/export/users desktop01(rw,nohide,insecure,no_subtree_check,async)

You can keep /home/exports desktop01(rw) for NFSv3 in /etc/exports.

/etc/init.d/nfs-kernel-server restart

On the client, create a mounting point and mount the directory from the NFSv4 server:

mkdir /home/NFSv4
mount -t nfs4  node01:/ /home/NFSv4

See mounted directories

df -h

Check the file system types

mount

On the server (node), add two directories, /usr/share/doc and /var/log, to the shared file system name space:

mkdir /export/DOC
mount --bind /usr/share/doc /export/DOC
mkdir /export/LOG
mount --bind /var/log /export/LOG

Modify /etc/exports by adding the export entries for these directories:

/export/DOC desktop01(ro,nohide,insecure,no_subtree_check,async)
/export/LOG desktop01(ro,nohide,insecure,no_subtree_check,async)

Re-export the filesystems by running command exportfs as follows:

exportfs -ra

On the client (desktop), re-mount the NFS file system:

mount  -o remount  /home/NFSv4

See the content of /home/NFSv4

ls /home/NFSv4
ls /home/NFSv4/LOG
ls /home/NFSv4/DOC