Mounting nfs failing

ernieball · 10-25-2014, 08:03 PM

Hi.

I'm trying to mount an nfs share on a client directory, but I get this error:

Quote:

# mount server.ip:/directory /home/user/dir
mount.nfs: access denied by server while mounting server.ip:/directory

I suspect I need to state username and password for auth to server, but I haven't found how to give it.

How can I mount with login/why do I get this error?

thanks a lot for all help

Ztcoracat · 10-25-2014, 11:25 PM

Hi:

I'm surprised that a Authentication Request window isn't opening and asking for your username and password. Check and see if the Web Server Authentication is "enabled".
http://docs.oracle.com/cd/E19728-01/...th.html#config

-:-Make sure that your nfs is up and running properly on the server-:-

I looked up the error your having.
This thread might help-
http://www.linuxquestions.org/questi...unting-934161/

http://www.linuxquestions.org/questi...-mount-921984/

In order to mount there has to be a 'mount point'-

Code:

#mount -t nfs server ip/location/to/dir    /mount/point

http://docs.oracle.com/cd/E19253-01/...423/index.html

Hope that helps-

grubby · 10-26-2014, 04:55 AM

Sounds to me your exports file is not properly configured.

Can you post your /etc/exports file? It should be on that server.ip host.

ernieball · 10-26-2014, 07:55 AM

Hi.

Yes. On server, which is actually a NAS running a nfs server as well..:

Quote:

$ cat /etc/exports
/nfs/Public *(ro,all_squash,sync,insecure,anonuid=65534,anongid=65534)
/nfs/Download *(ro,all_squash,sync,insecure,anonuid=65534,anongid=65534)
/nfs/nas *(rw,all_squash,sync,insecure,anonuid=65534,anongid=65534)

Quote:

showmount -e localhost
Export list for localhost:
/DataVolume/nas *
/DataVolume/Public *
/DataVolume/Download *

On clientside

Quote:

# showmount -e 10.15.11.100
Export list for 10.15.11.100:
/DataVolume/nas *
/DataVolume/Public *
/DataVolume/Download *

So i guess the service is running, but when I try to mount from client, I get this:

Quote:

# mount -t nfs -v 10.15.11.100:/DataVolume/nas /home/user/nfs/
mount.nfs: timeout set for Sun Oct 26 13:53:30 2014
mount.nfs: trying text-based options 'vers=4,addr=10.15.11.100,clientaddr=10.15.15.10'
mount.nfs: mount(2): Permission denied
mount.nfs: access denied by server while mounting 10.15.11.100:/DataVolume/nas

# ls -l /home/user/
drwxrwxrwx 2 user user 4096 Oct 26 01:58 nfs

Why am I denied?

grubby · 10-26-2014, 08:21 AM

I don't understand exactly how the /nfs/nas gets shown as /DataVolume/nas in the showmount. thats not what I usually see in nfs exports, but perhaps is a version 4 thing, which i'm not too familiar with.

I see it's trying to mount as version 4 NFS in your error output.
Could you try:

mount -t nfs -o vers=3 -v 10.15.11.100:/DataVolume/nas /home/user/nfs/

to force it to use version 3 and see what happens?

also, just for troubleshooting purposes you could try:

mount -t nfs -v 10.15.11.100:/nfs/nas /home/user/nfs/

or maybe try a different mountpoint (create a simple empty dir in / and try mounting it on that)

ernieball · 10-26-2014, 09:12 AM

Quote:

# mount -t nfs -v -o vers=3 10.15.11.100:/DataVolume/nas /home/user/nfs/
mount.nfs: timeout set for Sun Oct 26 15:11:02 2014
mount.nfs: trying text-based options 'vers=3,addr=10.15.11.100'
mount.nfs: prog 100003, trying vers=3, prot=6
mount.nfs: trying 10.15.11.100 prog 100003 vers 3 prot TCP port 2049
mount.nfs: prog 100005, trying vers=3, prot=17
mount.nfs: trying 10.15.11.100 prog 100005 vers 3 prot UDP port 929
10.15.11.100:/DataVolume/nas on /home/user/nfs type nfs (rw,vers=3)

This worked fine. The NAS is mounted and I can ls /home/user/nfs on client

So it was a version issue the probably :P

Thanks a lot for your help !

Ztcoracat · 10-26-2014, 09:46 AM

Quote:

Originally Posted by grubby

I don't understand exactly how the /nfs/nas gets shown as /DataVolume/nas in the showmount. thats not what I usually see in nfs exports, but perhaps is a version 4 thing, which i'm not too familiar with.

I see it's trying to mount as version 4 NFS in your error output.
Could you try:

mount -t nfs -o vers=3 -v 10.15.11.100:/DataVolume/nas /home/user/nfs/

to force it to use version 3 and see what happens?

also, just for troubleshooting purposes you could try:

mount -t nfs -v 10.15.11.100:/nfs/nas /home/user/nfs/

or maybe try a different mountpoint (create a simple empty dir in / and try mounting it on that)

Thanks!-

grubby · 10-26-2014, 12:26 PM

Your welcome

Most likely, the NFS server on your SAN only support NFSv3, while some recent linux distribution versions switched their defaults to v4.