NFS - Filesystem sharing problem

[B V B Kumar]

Dear All,

I shared /emsrad file system in my NFS server with the following steps.

1. edited the /etc/exports file and added the following entry.
/emsrad rw
2. exportfs -a
3. check the following parameters in /etc/rc.config.d/nfsconf file
NFS_SERVER=1
NUM_NFSD=16
NUM_NFSIUD=16
PCNFS_SERVER=0
START_MOUNTD=1
4. stoped and started the nfs.core and nfs.server services.

showmount command is not showing shared filesystem.
Can anybody help me out on this issue.

Thanks
Kumar

[Ramesh S]

Hi

"showmount" without any option will list all clients that have remotely mounted a filesystem from host.

In order to know the export filesystem,


# showmount -e or
# exportfs

And also in /etc/exports should be,

-
Ex:/emsrad -rw


Best Regards,
Ramesh S

[B V B Kumar]

Hi Ramesh,

Output of showmount -e is

#showmount -e
export list for tcsdevmd:
/emsrad rw

That means filesystem is exported.

Thanks
Kumar

[B V B Kumar]

Hi,

When i am trying to mount from client. It is giving permissions denied.

root@tcsdevmd:/> mount tcsdevems://emsrad /nfsclient
Permission denied.

Thanks
Kumar

[B V B Kumar]

Can anybody help on this issue please

Thanks
Kumar

[Dennis Handly]

>It is giving permissions denied.
root@tcsdevmd:/> mount tcsdevems://emsrad /nfsclient
Permission denied.

I don't think it is this obvious but you don't need that "//". Just:
# mount tcsdevems:/emsrad /nfsclient
I assume /nfsclient exists and is local?

If it isn't the "//", what does /etc/xtab show on the server?

[B V B Kumar]

Thanks Dennis for reply.

Sorry there is a correction.

#mount tcsdevems:/emsrad /nfsclient
permission denied.


Thanks
Kumar

[Dennis Handly]

>Sorry there is a correction.

And the answers to the other two questions?

[B V B Kumar]

Hi,

/nfsclient is mount point created on NFS client system.

contents of the /etc/xtab is

# cat /etc/xtab
/emsrad -access=rw


Thanks
Kumar

[Safarali]

HI Kumar
nfs client is activated in your client server
if not configure nfs client
if yes
try
1. ping your client from server and client vice versa
ping your client with host name

provide me the out of nslookup of client and server

Regards
Safar

[Dennis Handly]

>/nfsclient is mount point created on NFS client system.
>contents of the /etc/xtab is
/emsrad -access=rw

These two look fine.

Can you do a dummy mount of /emsrad back on the server somewhere else?

[Peter Nikitka]

Hi,

you need to add a minus-sign before the option specification in /etc/exports:
/emsrad -rw=

If you don't have access restrictions, drop the option, use just
/emsrad

Your syntax will give access to a host named 'rw', IMHO.

mfG Peter

[Sajjad Sahir]

In the case of nfs exports it's a best idead to practice to synchronize uid and gids client and server, then when you export something you don't have problem with permissions.

[Dave Olker]

Hi Kumar,

> # cat /etc/xtab
> /emsrad -access=rw

This is your problem. The syntax you're using means "only allow the NFS client named 'rw' to access the filesystem". What I think you were trying to do is allow any NFS clients access to the filesystem. In that case you would not need the "rw" after the directory in your /etc/exports file. It would just be:

# cat /etc/exports
/emsrad

If you make this change and then un-export and re-export the filesystem it should allow any client to mount the filesystem.

Regards,

Dave

[B V B Kumar]

Hi dave,

Thanks for reply.
I /etc/exports file and modified with /emsrad. After this i am able to mount in client but i am not able to create files.

error as follows:
#touch file1
touch: file1 cannot create

and if i am trying create from vi editor it is giving "Read-only filesystem"

Thanks
Kumar

[Safarali]

Hi Kumar

Your file system does not have proper permission reexport it as follows

in /etc/export file

/file system rw=hostname or (all)

Regards
safar

[Peter Nikitka]

Hi,

using a root account across NFS-mountpoints requires additional settings.
Best NOT use root but an ordinary user with proper access rights.
Look at
ls -la /nfsclient

mfG Peter

[B V B Kumar]

Hi all,

I found the problem.
I am trying with root account. by default root is diabled. For getting root access we need to add the following entry in exports file.

/emsrad -root=tcsdevmd

Thanks to all for providing help