12:18 p.m.
On 01/28/2014 03:37 AM, Sumit Bose wrote:
On Tue, Jan 28, 2014 at 12:36:09AM +0000, Nordgren, Bryce L -FS
wrote:
> Can sssd allocate uid/gid out of a pool unique to each domain? The mapping need not
be complex: "last_allocated+1" should suffice.
SSSD supports a simple mapping based on the RIDs of the users and
groups. You can find details in the sssd-ad man page in the 'ID MAPPING'
section. Does this scheme work for you?
HTH
bye,
Sumit
> I'm motivated to ask the following question because I "supplement" our
official active directory with accounts for external partners/collaborators. Numeric
uid/gid fields could well collide because there's no coordination, nor is there likely
to be. In the long term, we'd like to fix that, and we'd like to convince our
powers-that-be that joining one or more larger "identity federations" is in
their best interest. But that puts us right back where we started, as uid/gids across
several large, mostly disconnected organizations are not going to be coordinated.
>
> So: What reasons still exist to insist on coordination? Are we ready to make the leap
to coordinating the set of text-based-principals which are valid within a domain?
>
> File sharing via NFS with "sec=sys" is just about the only obstruction I
can think of. Otherwise, uid/gids are local to each machine, and it is sufficient to allow
each machine to perform its own unique mapping from "valid username" to uid.
>
> So if I either prohibit NFS entirely or insist on "sec=krb5", could I have
a gaggle of linux boxes which individually allocate uids and gids as they encounter valid
Kerberos credentials?
>
> Sorry for wandering into the abstract there...this seemed an appropriate venue for
determining whether such a scheme was viable.
>
> Bryce
>
>
>
>
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You also may consider bringing FreeIPA to manage you Linux boxed and
provide uid/gid data while users from AD would come via trust or sync.
Have you looked at this avenue?
--
Thank you,
Dmitri Pal
Sr. Engineering Manager for IdM portfolio
Red Hat Inc.
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