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Old 03-25-2014, 01:44 PM   #1
Linux-at-last
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NFS file sharing is working, but mounted partitions are not visible through network.


HI there,

I got NFS working for two kubuntu machines, they can see the shared folders on each other just fine (the shared folder I set is a user folder within the /home diretory in each machine).

I used this tutorial,

http://mostlylinux.wordpress.com/network/nfshowto/


The problem I have is that I can't make a partition mounted to a folder within the shared folder visible to the other computer, only files directly put within the /home/user folder become visible.

For example, there are PC 1 and PC 2 in the network.

PC 1 has shared /home/user1. The contents of this folder are perfectly visible to PC 2.

Then I try to mount /dev/sdc1 to lets say, /home/user1/storage.

On PC 1 I can access the contents of /dev/sdc1 just fine through /home/user1/storage, but on PC 2, through the network, it can see that the storage folder is there but it is recognized as having no files inside.


What is going on here?
 
Old 03-25-2014, 06:34 PM   #2
allend
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Try adding the nohide option to the share definition in /etc/exports

From 'man exports'
Quote:
nohide This option is based on the option of the same name provided in IRIX NFS. Normally, if a server exports two filesystems one of which is mounted on the other, then the client will have to mount both filesystems explicitly to get access to them. If it just mounts the parent, it will see an empty directory at the place where the other filesystem is mounted. That filesystem is "hidden".

Setting the nohide option on a filesystem causes it not to be hidden, and an appropriately authorised client will be able to move from the parent to that filesystem without noticing the change.
 
Old 03-29-2014, 07:51 AM   #3
Linux-at-last
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Quote:
Originally Posted by allend View Post
Try adding the nohide option to the share definition in /etc/exports

From 'man exports'
Hey @allend, thanks for caring enough to post.

Apprently the option nohide won't work just by itself. But it seems there is a way to do what I need:

First, mount points inside the shared directory must be explicitly expressed in /etc/exports in order to become visible to clients and the line should contain the option crossmnt, so etc/exports should look like this:

/home/user1 xxx.xxx.xxx.xxx(nohide,rw,sync,no_subtree_check,crossmnt)
/home/user1/storage xxx.xxx.xxx.xxx (nohide,rw,sync,no_subtree_check)

xxx.xxx.xxx.xxx being the IP address of the client machine.

The option crossmnt serves to make mount points inside the shared directory visible.

And if I tested correctly, if you express a mount point explicitly in /etc/exports, and the mount point is not inside another mount point, then the crossmnt option is not necessary.

This way the contents of the directory storage becomes visible to the client machines.
 
Old 03-29-2014, 08:34 AM   #4
allend
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Glad you got it working to your satisfaction. Well done!

Thanks for posting your solution as it may help someone else.
 
  


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