[virt-tools-list] NFS filesystem size incorrect on client

[Mike Hall]

Sorry about pestering you guys, let me know if this is not the best list for this type of question.
Anyway, an NFS storage issue ...

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SAN/NAS BOX (NFS Server):
-------------------------

/ filesystem on VolGroup00/LogVol00 = 7.6GB
A 20GB filesystem on vg_vm/lv_vm1 is mounted at /srv/vm1
A 100GB filesystem on vg_vm/lv_data1 is mounted at /srv/data1

Output of 'df -h' (extraneous stuff removed):

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
                      7.6G  1.8G  5.5G  25% /
/dev/mapper/vg_vm-lv_vm1
                       20G  173M   19G   1% /srv/vm1
/dev/mapper/vg_vm-lv_data1
                       99G  188M   94G   1% /srv/data1


/srv/vm1 and /srv/data1 are mounted with 'mount --bind' to /exports/vm1 and /exports/data1, then exported using NFS:

/exports        192.168.1.28(ro,fsid=0)
/exports/vm1    192.168.1.28(rw,no_root_squash,sync)
/exports/data1  192.168.1.28(rw,no_root_squash,sync)


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VM HOST (NFS client):
---------------------

On the NFS client, these shares are mounted to /vm/san as follows:

mount -t nfs4 192.168.1.49:/ /vm/san

[root at vmhost ~]# ls -al /vm/san/
total 32
drwxrwxrwx 4 nfsnobody nfsnobody 4096 Sep  2 12:12 .
drwxr-xr-x 7 root      root      4096 Sep  2 12:31 ..
drwxr-xr-x 2 nfsnobody nfsnobody 4096 Sep  2 12:59 data1
drwxr-xr-x 2 nfsnobody nfsnobody 4096 Sep  2 12:12 vm1

I can write to these directories so all seems good.

However, 'df -h' on the client side shows (extraneous stuff removed):

Filesystem            Size  Used Avail Use% Mounted on
192.168.1.49:/        7.6G  1.8G  5.5G  25% /vm/san


In other words, the 20GB + 100GB LVs on the NFS server side are now showing up as 7.6GB in size on the client size ... This is the size of the / filesystem on the server side.

Virt-manager of course complains when I try to create a 15GB image file in /vm/sam/vm1, it thinks the entire /vm/san filesystem has only 5.5 GB free.

What am I doing wrong here? I'm guessing my NFS setup is incorrect somehow?

Thanks yet again,

Michael Hall
IT Communications Officer
Alice Springs Town Council
mhall at astc.nt.gov.au
(08) 8950 0561