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Setting Up An NFS Server And Client On CentOS 5.5 - Page 2

4 Mounting The NFS Shares On The Client

client:

First we create the directories where we want to mount the NFS shares, e.g.:

mkdir -p /mnt/nfs/home
 mkdir -p /mnt/nfs/var/nfs

Afterwards, we can mount them as follows:

mount 192.168.0.100:/home /mnt/nfs/home
 mount 192.168.0.100:/var/nfs /mnt/nfs/var/nfs

You should now see the two NFS shares in the outputs of

df -h
[root@client ~]# df -h
 Filesystem            Size  Used Avail Use% Mounted on
 /dev/mapper/VolGroup00-LogVol00
                        28G  2.2G   25G   8% /
 /dev/sda1              99M   13M   82M  14% /boot
 tmpfs                 250M     0  250M   0% /dev/shm
 192.168.0.100:/home    28G  2.6G   25G  10% /mnt/nfs/home
 192.168.0.100:/var/nfs
                        28G  2.6G   25G  10% /mnt/nfs/var/nfs
 [root@client ~]#

and

mount
[root@client ~]# mount
 /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
 proc on /proc type proc (rw)
 sysfs on /sys type sysfs (rw)
 devpts on /dev/pts type devpts (rw,gid=5,mode=620)
 /dev/sda1 on /boot type ext3 (rw)
 tmpfs on /dev/shm type tmpfs (rw)
 none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
 sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
 192.168.0.100:/home on /mnt/nfs/home type nfs (rw,addr=192.168.0.100)
 192.168.0.100:/var/nfs on /mnt/nfs/var/nfs type nfs (rw,addr=192.168.0.100)
 [root@client ~]#

 

5 Testing

On the client, you can now try to create test files on the NFS shares:

client:

touch /mnt/nfs/home/test.txt
 touch /mnt/nfs/var/nfs/test.txt

Now go to the server and check if you can see both test files:

server:

ls -l /home/
[root@server ~]# ls -l /home/
 total 55540
 -rw-r--r-- 1 root         root                0 Sep 16 17:30 test.txt
 [root@server ~]#
ls -l /var/nfs
[root@server ~]# ls -l /var/nfs
 total 0
 -rw-r--r-- 1 65534 65534 0 Sep 16 17:30 test.txt
 [root@server ~]#

(Please note the different ownerships of the test files: the /home NFS share gets accessed as root, therefore /home/test.txt is owned by root; the /var/nfs share gets accessed as nobody/65534, therefore /var/nfs/test.txt is owned by 65534.)

 

6 Mounting NFS Shares At Boot Time

Instead of mounting the NFS shares manually on the client, you could modify /etc/fstab so that the NFS shares get mounted automatically when the client boots.

client:

Open /etc/fstab and append the following lines:

vi /etc/fstab
[...]
192.168.0.100:/home  /mnt/nfs/home   nfs      rw,sync,hard,intr  0     0
192.168.0.100:/var/nfs  /mnt/nfs/var/nfs   nfs      rw,sync,hard,intr  0     0

Instead of rw,sync,hard,intr you can use different mount options. To learn more about available options, take a look at

man nfs

To test if your modified /etc/fstab is working, reboot the client:

reboot

After the reboot, you should find the two NFS shares in the outputs of

df -h
[root@client ~]# df -h
 Filesystem            Size  Used Avail Use% Mounted on
 /dev/mapper/VolGroup00-LogVol00
                        28G  2.2G   25G   8% /
 /dev/sda1              99M   13M   82M  14% /boot
 tmpfs                 250M     0  250M   0% /dev/shm
 192.168.0.100:/home    28G  2.6G   25G  10% /mnt/nfs/home
 192.168.0.100:/var/nfs
                        28G  2.6G   25G  10% /mnt/nfs/var/nfs
 [root@client ~]#

and

mount
[root@client ~]# mount
 /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw)
 proc on /proc type proc (rw)
 sysfs on /sys type sysfs (rw)
 devpts on /dev/pts type devpts (rw,gid=5,mode=620)
 /dev/sda1 on /boot type ext3 (rw)
 tmpfs on /dev/shm type tmpfs (rw)
 none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
 sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
 192.168.0.100:/home on /mnt/nfs/home type nfs (rw,sync,hard,intr,addr=192.168.0.100)
 192.168.0.100:/var/nfs on /mnt/nfs/var/nfs type nfs (rw,sync,hard,intr,addr=192.168.0.100)
 [root@client ~]#

 

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