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Mounting a directory using nfs version4


 
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# 1  
Old 09-06-2009
Mounting a directory using nfs version4

Hi,

I would like to know how can we mount a directory using nfs v4 ?

When I use the below command, I am not sure what nfs version am using to mount the directory.

mount -t <server_name>:<shared_directory> <shared_directory>.

eg:
mount -t 10.50.0.8:/home/arun/mount/share_dir /home/arun/mount/share_dir

If the above command uses anyother nfs version, then can anyone tell me the command to mount a directory using nfs4. OS is RHEL5

Thanks in advance.
# 2  
Old 09-06-2009
Hi,

Is this what you are looking for?
Code:
mount -t nfs4 <server_name>:<shared_directory> <shared_directory>

# 3  
Old 09-10-2009
Hi,

I tried ur command. Unfortunately, it failed with the below error message:

mount.nfs4: Operation not permitted

Do you have any other suggestions ?

Thanks.
# 4  
Old 09-10-2009
It is not as simple as specifying the type in an option to the mount command. NFSv4 only uses TCP and also uses a pseudo-filesystem. Configuration is radically different than previous versions of NFS.

First check to see if you are NFSv4 enabled. Using rpcinfo, you should see a line like the following. If you do not, you are not running NFSv4. You also need to ensure that port is open in your firewall for TCP.
Code:
rpcinfo -p
....
XXXXXXX    4   tcp   2049  nfs
....

You need to ensure the ID to name mapping daemon (idmapd) is running on the server and is configured correctly (idmapd..conf) You also need to do this for you client system.

You also need to ensure that the exports done through one main export point (the pseudofile-system), with all other exports grouped underneath the main export.

Once this is all done, you show check the setup using showmount -e <servername>
If your master mount is /NFS4, you should see something like
Code:
/NFS4                    XXX.XXX.XXX.XXX
/NFS4/shared_directory   XXX.XXX.XXX.XXX

You then mount the main export, not shared_directory.

Do a Internet seach for "RHEL NFSv4 howto" or "Centos NFSv4" and you will find lots of information.
# 5  
Old 09-10-2009
Hi Murphy, Thanks for the help.

The server is NFSv4 enabled and the firewall is disabled. However, I could not get what you meant by this (am relatively newbie)

>>>>>
You need to ensure the ID to name mapping daemon (idmapd) is running on the server and is configured correctly (idmapd..conf) You also need to do this
>>>>>

Googling some NFSv4 How to pages, I did the below (and it did not throw me any error). Not sure what I did was correct.

On NFS ServerSmilieexample directories have been quoted below)

Code:
1. Edited /etc/exports by adding "/home/aruns/test 10.50.0.52 (rw,fsid=0,sync)"
2. Did "exportfs -r"

On Client side:

Code:
1. mount -t nfs4 10.50.0.52:/ /home/aruns/test

It got mounted successfully. But am half minded whether this is the correct process.

Would u like to help ??

Thanks.
# 6  
Old 09-11-2009
Quote:
Would u like to help ??
Read the following: NFSv4 setup for Fedora/Redhat/Centos
# 7  
Old 09-12-2009
Thanks a lot Murphy.

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