Re: Q: nfs server fails to mount own exported resource, but other client able to mount

[Ron Leach <ronleach@tesco.net>]

Escaped from list (:

On 24/04/2014 09:49, Snow Leopard wrote:
> Hi,
>
> I came across strange "mount" problem on nfs server -- it refuses to
> mount it's own directory while other nfs clients able mount nfs server
> exported directoryjust fine
>
> 1. nfs server
> name: install.myclub.com
> OS: wheeze (Debian)
> ip: 192.168.0.62
> /etc/exports: /export/home 192.163.0.0/24(rw,subtree_check)
> drxwrxwrxw /export/home
>
> 2. client1
> name: meteor.myclub.com
> OS: Valhalla (Red Hat 7.3)
> ip: 192.168.0.1
> mount -t nfs install:myclub.com:/export/home /mnt
> mounts directory without any error
>
> 3. client2
> name: moon.myclub.com
> OS: squeeze (Debian)
> ip: 192.168.0.64
> mount -t nfs install:myclub.com:/export/home /mnt
> mounts directory without any error
>
> 4. client3 (nfs server itself)
> name: install.myclub.com
> OS: wheeze (Debian)
> ip: 192.168.0.62
> mount -t nfs 192.168.0.62:/export/home /mnt
> mounts directory without any error
>
> 5. client4 (nfs server itself)
> name: install.myclub.com
> OS: wheeze (Debian)
> ip: 192.168.0.62
> mount -t nfs install:/export/home /mnt
> mounts fails with an error
>
> mount -v -t nfs install:/export/home /mnt
> mount.nfs: timeout set for Thu Apr 24 01:21:36 2014
> mount.nfs: trying text-based options
> 'vers=4,addr=127.0.1.1,clientaddr=127.0.0.1'
> mount.nfs: mount(2): Permission denied
> mount.nfs: access denied by server while mounting install:/export/home
>
> mount -v -t nfs install.myclub.com:/export/home /mnt
> mount.nfs: timeout set for Thu Apr 24 01:22:50 2014
> mount.nfs: trying text-based options
> 'vers=4,addr=127.0.1.1,clientaddr=127.0.0.1'
> mount.nfs: mount(2): Permission denied
> mount.nfs: access denied by server while mounting
> install.myclub.com:/export/home
>
> The error indicates that when I attempt to mount by using FQDN of nfs
> server -- the name resolves to 127.0.1.1 and client resolves to
> 127.0.0.1 .


I wonder if it is letting you mount as 'nfs' when you supply the IP
address, but is not letting you mount as 'nfs' when you try to address
the device locally (which doesn't surprise me).

While I don't use mount, I do use fstab to mount the device containing
our nfs export, locally

/dev/md5 /mnt/point ext4 rw,auto,users,exec

(and a mount command can be similarly constructed).

Isn't the 'right' way to mount local filesystems directly as 'ext4' or
whatever, and only mount as 'nfs' if the filesystem has to be accessed
at another IP address?

regards, Ron