Re: NFSv4 fsid=0 export still necessary?

[Steve Dickson <SteveD@redhat.com>]

On 12/07/2011 11:32 AM, J. Bruce Fields wrote:
> On Wed, Dec 07, 2011 at 11:30:38AM -0500, Steve Dickson wrote:
>>
>>
>> On 12/05/2011 08:10 PM, J. Bruce Fields wrote:
>>> On Sat, Dec 03, 2011 at 11:51:19AM -0500, Steve Dickson wrote:
>>>> No, the fsid=0 export option is no longer necessary to make v4
>>>> exports compatible with v2/v3 exports. When the fsid option
>>>> is not set, the default root is define as "/" which allows
>>>> the v4 clients to mount the same exports as does the v2/v3 clients.
>>>>
>>>> Now if you do not what "/" as your default root, you can
>>>> set fsid to something like fsid=/export. This will
>>>> change to default root to the /export directory which
>>>> means your v4 clients will only be able to access exports
>>>> under the /export directory. 
>>>
>>> I actually have some old patches that allow you to use an alternate root
>>> for all NFS versions; you'd do something like:
>>>
>>> 	/exports	*(ro, root)
>>> 	/exports/foo	*(rw)
>>> 	/exports/bar	*(rw)
>>>
>>> and then a v2, v3, or v4 client would mount server:/foo or server:/bar.
>>>
>>> But that was just a fun project, it wasn't clear to me whether anyone
>>> wanted it particularly.
>>>
>>> Also, that didn't seem like a great user interface.  I'd rather have
>>> something like
>>>
>>> 	rootpath=/exports
>>> 	foo	*(rw)
>>> 	bar	*(rw)
>>>
>>> Actually, as long as we were doing that I'd rather replace /etc/exports
>>> entirely; maybe do something like
>>>
>>> 	[nfsd]
>>> 		rootpath=/exports
>>> 	[export "foo"]
>>> 		clients=*
>>> 		options=rw
>>> 	[exports "bar"]
>>> 		clients=*
>>> 		options=rw
>>>
>>> And also use the same file for other nfsd parameters:
>>>
>>> 	[nfsd]
>>> 		versions=2,3,4,4.1
>>> 		threads=8
>>> 		rootpath=/exports
>>> 	[export "foo"]
>>> 		...
>> I kinda like this idea... In the systemd world, its less
>> error prone to have daemons read their own configuration 
>> files... 
>>
>> Where would this new file live and what would be called?
> 
> I'm not sure.... Where did you end up putting the file for nfs mount
> configuration?

In /etc... /etc/nfsmount.conf... but /etc/default seems to be popular
these days...  

steved.