Re: virtualizing local users

From: Ralf Hildebrandt (no email)
Date: Tue Jul 02 2002 - 05:08:57 EDT


On Tue, Jul 02, 2002 at 04:03:07AM -0500, Phil Howard wrote:

> If each map is for a specific domain, why search them all? Why not just
> search the one map for that domain, using only the username part as the
> key, and stop there?

Because all data could be in all maps. What you want would probably an
LDAP server (search only in the ou=domain or something like that)

> load balancing. I want to be able to easily and quickly move a group of
> domains from one server to another one.

Simply change what points to in your map.

> As a result of this, these maps would have only the user part as the
> key, so even if you wanted to search all the maps for some user at domain,
> you can't actually carry out a reasonable search. If you searching
> for , and there exists an entry for "foo" in the map
> for example.org, is that considered a match?

man 5 virtual
(yes)

> | This will not work because of "chroot" and security issues. Just drive
> | both the VDA and Postfix from a shared "userdb", MySQL or LDAP database.
>
> What directory will it be chroot-ed into?

$queue_directory

> With reiserfs, it is now more practical to use the filesystem as a database.

If you want to lose all data, yes. I get sick when I see the weekly
patches for various flaws. I don't let Reiser anywhere close to a
system which needs to be reliable.

> I haven't ruled out using a db file rebuilt periodically from other data.
> But I probably would go for cdb in that case.

Yup.

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
"Internet is so big, so powerful and pointless that for some people it
is a complete substitute for life."-Andrew Brown
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