ZFS + NFS + multiple hosts/mount options ..?

[Lev Serebryakov]

On 30.08.2016 18:31, Willem Jan Withagen wrote:

>>> Is there a way through the zfs set sharenfs="..." property to share
>>> data/somefs readonly to host "dev.lan" _and_ read/write to host 
>>> "duvel.prod.lan" ? Or should I just set sharenfs="off" and use
>>> /etc/exports (I'm using NFS4) ? It seems impossible to have multiple
>>> hosts/options/... when the sharenfs property is used ..
>>  No luck here. I've raised this question multiple times withoput any
>> reaction. Here is (very old) PRs with patch, which implements this:
>>
>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=147881
>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202820
>>
> 
> I'd say, forget about getting any flexible through sharenfs.
  WHY?!

> Did that discussion about 3 years ago, and it boiled down. Don't dare to
  I don't see any good reason to not support this, aside "It will not be
compatible with Illumos". I don't buy this, sorry. Any other reasons?

> change it because the people doing ZFS don't like it.
 There is one BIG problem: deep ZFS hierarchies. If I need to export 100
FSes (100 users' home directories, for example) in one ZFS tree to 4
networks (2xIPv4, 2xIPv6) I need to add 400 (!!!) lines to /etc/exports
by hands. All these lines will be virtually the same, and good luck to
maintain this mess.

 If "sharenfs" supports multiple hosts/networks, I need to set this
property ONCE (on zpool/home, parent of all FSes in question) and IT'S
ALL! And if I need to change same options, I need to change it ONCE and
re-export ZFS.

 Unfortunately, it is NOT enough to export parent FS :(

-- 
// Lev Serebryakov