[SOLVED] NFS Client Unable to Mount the NFS Share

devUnix · 10-30-2013, 11:44 AM

Hi!

I am setting up an NFS Server...

Mounting the file system on the server itself for verification...

Code:

[root@nj1 ~]# mount /dev/VolGroup01/mdeapp /var/mdeapp/fund_upload/
[root@nj1 ~]# ls -l /var/mdeapp/fund_upload/
total 16
drwx------. 2 root root 16384 Oct 30 15:04 lost+found

cat /etc/exports:

Code:

/var/mdeapp/fund_upload nj2(rw,sync) nj3(rw,sync)

Code:

[root@nj1 ~]# exportfs
/var/mdeapp/fund_upload
                nj2.my.blah
/var/mdeapp/fund_upload
                nj3.my.blah

Now when I try to mount the above directory on the NFS client nj2 or nj3, I get the following error:

Code:

[root@nj2 ~]# mount nj1:/var/mdeapp/fund_upload /mnt
mount: wrong fs type, bad option, bad superblock on nj4mdedvapp006:/var/mdeapp/fund_upload,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type> helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

I checked on the NFS Server the following (per the documentation here: http://www.tldp.org/HOWTO/NFS-HOWTO/server.html):

Code:

[root@nj1 ~]# rpcinfo -p
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100011    1   udp    875  rquotad
    100011    2   udp    875  rquotad
    100011    1   tcp    875  rquotad
    100011    2   tcp    875  rquotad
    100005    1   udp  53126  mountd
    100005    1   tcp  54682  mountd
    100005    2   udp  54635  mountd
    100005    2   tcp  35661  mountd
    100005    3   udp  37585  mountd
    100005    3   tcp  40359  mountd
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    2   tcp   2049  nfs_acl
    100227    3   tcp   2049  nfs_acl
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs
    100227    2   udp   2049  nfs_acl
    100227    3   udp   2049  nfs_acl
    100021    1   udp  53802  nlockmgr
    100021    3   udp  53802  nlockmgr
    100021    4   udp  53802  nlockmgr
    100021    1   tcp  39972  nlockmgr
    100021    3   tcp  39972  nlockmgr
    100021    4   tcp  39972  nlockmgr
[root@nj1 ~]#

I do not see "status" in the output above.

I do not see rpc.lockd and rpc.statd as services or inside /etc/init.d/

If I try to install rpc.statd then yum reports it is already there as part of nfs-utils which I have installed.

I have installed rpcbind on both the clients and the server.

What is missing here?

I have already restarted rpcbind and nfs services several times but nothing has helped me so far.

voleg · 10-30-2013, 12:14 PM

"wrong fs type" usually mean missing drivers (modules) for this type of FS.

Code:

$ lsmod | grep nfs
nfs                   419345  1
lockd                  73534  1 nfs
fscache                53874  1 nfs
auth_rpcgss            44917  1 nfs
nfs_acl                 2647  1 nfs
sunrpc                261235  8 nfs,lockd,auth_rpcgss,nfs_acl

Other option is NFS version. Check you speaking same version, I suggest you version 3.

toothandnail · 10-30-2013, 03:55 PM

The command you used does not include filesystem type. I would be using something like this:

Code:

mount -t nfs nj1:/var/mdeapp/fund_upload /mnt -o vers=3

I also force NFS version 3 because I've recently had problems with very slow mounts of version 4.

I'd also not be using /mnt bare - I would create a specific mount directory under /mnt.

Paul.

kbscores · 10-30-2013, 04:58 PM

Which version of linux (client and server)?

devUnix · 10-31-2013, 04:58 AM

NFS Modules:

Code:

# lsmod | grep nfs
nfsd                  305863  11
exportfs                4236  1 nfsd
nfs                   402752  0
lockd                  74270  2 nfsd,nfs
fscache                46859  1 nfs
nfs_acl                 2647  2 nfsd,nfs
auth_rpcgss            44895  2 nfsd,nfs
sunrpc                263516  18 nfsd,nfs,lockd,nfs_acl,auth_rpcgss

Server and Client Versions of Red Hat:

Code:

[root@nj1 ~]# uname -r
2.6.32-279.el6.x86_64

[root@nj2 ~]# uname -r
2.6.32-279.el6.x86_64

Mounting again:

Code:

[root@nj2 ~]# mount -t nfs nj1:/var/mdeapp/fund_upload /try-mount
mount: wrong fs type, bad option, bad superblock on nj4mdedvapp006:/var/mdeapp/fund_upload,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type> helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

[root@nj2 ~]# mount -t nfs nj1:/var/mdeapp/fund_upload /try-mount -o vers=3
mount: wrong fs type, bad option, bad superblock on nj4mdedvapp006:/var/mdeapp/fund_upload,
       missing codepage or helper program, or other error
       (for several filesystems (e.g. nfs, cifs) you might
       need a /sbin/mount.<type> helper program)
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

[root@nj2 ~]#

Log:

Code:

[root@nj2 ~]# dmesg | tail
NOHZ: local_softirq_pending 100
NOHZ: local_softirq_pending 100
RPC: Registered named UNIX socket transport module.
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
FS-Cache: Loaded
Registering the id_resolver key type
SELinux: initialized (dev rpc_pipefs, type rpc_pipefs), uses genfs_contexts
FS-Cache: Netfs 'nfs' registered for caching
[root@nj2 ~]#

amit.kanade1983 · 10-31-2013, 08:17 AM

Can u run fsck on your filesystem to check for any errors if at all.

devUnix · 10-31-2013, 09:03 AM

Well, I installed nfs-utils on the clients as well. This resolved the problem.

voleg · 10-31-2013, 02:12 PM

Cool !!!

This is really prerequisite

additionalInformation · 09-12-2019, 11:53 AM

On my Debian 9 (as NFS-client) box I had to install a packet, too:

Code:

sudo apt-get install nfs-common