NFS hangs on mount

azurianarcher · 07-23-2013, 02:28 PM

I am trying to mount a directory using NFS. The directory is on a separate partition and I am sharing its mount point.

When I try to mount the shared directory on a client (even if that client is the same machine as the server), the mount command hangs (seemingly) forever (I have let it run for 6 hours before stopping it).

The disk containing the shared data does have a lot of data (about 4TB) on it, but I don't think the server should have to examine all that data to mount it remotely.

Is there anything I can do to make this work?

I am on Fedora 17 x64

My /etc/exports:

Code:

/media/Data/Media      127.0.0.1(ro,nohide)

Note that I am using 127.0.0.1 temporarily for testing.
Also note that the drive is mounted at /media/Data and Media is a subdirectory on that drive.

Let me know what extra information I can provide (I don't know much about NFS).

linosaurusroot · 07-24-2013, 05:54 AM

What do you get from these commands on the server?

Code:

showmount -e
showmount -a
rpcinfo -p

azurianarcher · 07-24-2013, 08:37 AM

This is what I get (note that this is before any mount commands have been issued after starting the server fresh, selinux is in permissive mode and the firewall is turned off)

EDIT: I also tried with selinux disabled and nothing changed

Code:

% showmount -e                                                                                              
Export list for sarah25.home:
/media/Data/Media 127.0.0.1
 % showmount -a    
All mount points on sarah25.home:
 % 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
    100024    1   udp  59650  status
    100024    1   tcp  50026  status
    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   4002  nlockmgr
    100021    3   udp   4002  nlockmgr
    100021    4   udp   4002  nlockmgr
    100021    1   tcp   4002  nlockmgr
    100021    3   tcp   4002  nlockmgr
    100021    4   tcp   4002  nlockmgr
    100005    1   udp  20048  mountd
    100005    1   tcp  20048  mountd
    100005    2   udp  20048  mountd
    100005    2   tcp  20048  mountd
    100005    3   udp  20048  mountd
    100005    3   tcp  20048  mountd
    100011    1   udp    875  rquotad
    100011    2   udp    875  rquotad
    100011    1   tcp    875  rquotad
    100011    2   tcp    875  rquotad

gdizzle · 07-30-2013, 01:27 AM

Change:

Code:

/media/Data/Media      127.0.0.1(ro,nohide)

To this:

Code:

/media/Data/Media      *(ro,nohide)

As a test your mounting your local loopback there are known problems:

http://h10025.www1.hp.com/ewfrf/wc/d...name=c02073470

azurianarcher · 08-04-2013, 07:20 PM

Ok I tried what you said (changing /etc/exports and using a different machine) and I get the same problem. The client is Linux Mint 15 x64 and the mount hangs indefinitely.

I also tried exporting my home directory, so my /etc/exports now reads

Code:

/media/Data/Media      *(ro,nohide)
/home/mehrlich		*(ro,nohide)

When I try to mount /home/mehrlich from the client machine, it mounts immediately (note that /home/mehrlich is on my system partition while /media/Data/Media is on the raid array). Now, some of the directories under /home/mehrlich are bound directories to folders under /media/Data. When I try to browse to those folders over nfs (after mounting /home/mehrlich on the client), the folders appear empty. However when I browse to those same folders on the server they are populated as they should be.

Just to be clear I am mounting on the client using

Code:

# Hangs forever
sudo mount -t nfs 192.168.1.54:/media/Data/Media /mnt

# Mounts immediately but bound directories are empty 
sudo mount -t nfs 192.168.1.54:/home/mehrlich /mnt

Thanks for the help and sorry about the late reply

nico34 · 09-15-2013, 05:45 AM

/media/Data/Media *(rw,sync,no_root_squash) #you can change rw to ro if you want
/home/mehrlich *(rw,sync,no_root_squash)

try this on your exports mate, then restart nfs server and retry mounting again on your client

bkcreddy17 · 09-17-2013, 06:54 AM

Why can't you use automounts? This will mount on demand and will stop that hang issue.