[Gluster-devel] UID mapping feature

[Amar S. Tumballi]

This was long pending task, and now is complete. But the uid/gid mapping has
a upper limit of 32 mappings per translator instance. Also it provides the
'root-squashing' option like NFS. Hope few people like it.

Code committed to glusterfs--mainline--3.0--patch-323

I have done testing of few straight forward cases. There may be glitches in
some corner cases. Let me know how it works for you.

Regards,
Amar

2007/7/3 Anand Avati <avati at zresearch.com>

> Bruce,
>  Yes, your idea makes sense. Basically the fixed-id translator came in as a
> hack a while back. Another idea would be to make fixed-id lookup PAM and
> work like the NFS uidmapper.
>
> thanks,
> avati
> 2007/6/29, Bruce <bruce at webfarm.co.nz>:
>
>
>> Howdy all,
>>
>> I would like to request a feature which maybe quite easy with the
>> existing fixed-id translator.
>>
>> The theory we have here is that we want to be able to have all our
>> servers use glusterfs (or a system like it) to store files, however at
>> the moment each server has a unique set of users and some even have
>> Control panels users setup other users with which makes migration
>> difficult.
>>
>> Basically the idea is to allow for UID mapping, for example on all
>> servers, users are currently set up with user IDs between 100 and 199
>> (as an example), however the translator would convert these to 200-299
>> for server1, 300-399 for server2, and so on... Hence all the servers
>> have unique User IDs on the storage servers and allow for quotas to be
>> set and avoid security issues.
>>
>> The client config file might look something like this:
>> volume server1-live
>>  type protocol/client
>>  option transport-type tcp/client
>>  option remote-host 192.168.45.208
>>  option remote-subvolume brick
>> end-volume
>>
>> volume server1
>>  type features/fixed-id
>>  option map-uids 100:199 200:299
>>  option map-gids 100:199 200:299
>>  subvolumes server1
>> end-volume
>>
>> volume server2-live
>>  type protocol/client
>>  option transport-type tcp/client
>>  option remote-host 192.168.45.208
>>  option remote-subvolume brick
>>  subvolumes server2
>> end-volume
>>
>> volume server2
>>  type features/fixed-id
>>  option map-uids 100:199 300:399
>>  option map-gids 100:199 300:399
>>  subvolumes server2
>> end-volume
>>
>> and of course a unify on top of this (and maybe afr's under the fixed-id
>> types)
>>
>>
>> I am hoping that because this should be an easy add with the fixed-id
>> stuff that it will make it into a pre-release.
>>
>> Cheers,
>> --
>> Bruce Parker
>> Engineering Team Leader
>>
>> DDI  +64 6 757 2881
>>
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>> Zealand  I  Telephone +64 6 757 2881  I  Facsimile +64 6 757 2883
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>>
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>>
>
>
> --
> Anand V. Avati
>
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-- 
Amar Tumballi
Gluster/GlusterFS Hacker
[bulde on #gluster/irc.gnu.org]
http://www.zresearch.com - Commoditizing Super Storage!