[Valvula] sql default limit per domain user in mquota

[Francis Brosnan Blázquez]

Hello Kapetanakis.

Thanks for your interest. I haven't had enough time to look at the
change you propose and the state of mod-mquota, but my initial review
is that the module will require the following work:

- Add support for SQL (currently all quota configuration is done
through /etc/valvula/valvula.conf, <default-sending-quota> tag).

- This means that before adding multi database SQL access, first is
required a general module update to have SQL configurations located at
a MySQL database.

- Because of that, maybe a more generic approach can be implemented at
the very beginning, with a single database. That will improve a lot
usability for a system administrator (having several databases or
tables for the same thing is problematic).

- After that, a general update to mod-mquota must be applied because
current period selection is global (see __mod_mquota_current_period).
That will require rewriting it to make it support domain/user period
storage
(adding, possibly one or two hashes) and then, updating the rest of the
module where this is used (I've seen a couple of places that will
require a bit of work).

- Apart from that, module update **must** support previous
configuration so old installations keep working without any issue, so
users that want MySQL support for this module, and hence user/domain
level selection, can opt-in.

- Once finished, a full regression test is required to ensure it works
with global, domain and user limits, but also to check valgrind is fine
with it.

A bit work :-) 

Please, before investing your time, if you attempt to make this change
for it to be included into valvula's official repo, we will need a CLA.
If you are interested, please, let me know so I can request it.

Best Regards.


El lun, 26-03-2018 a las 14:30 +0300, Kapetanakis Giannis escribió:

> Hi,
> 
> I was wondering if the following change (not yet done) is interesting to your project.
> 
> Right now mod-mquota uses same limits for all domains.
> 
> I think it might be easy to make a change and add separate sql configuration per domain or even per user (in a domain).
> 
> I'm not talking about domain limits (all users) but specific user limits per domain or per user.
> 
> user1 en domain1.com: minute-limit=2, hour-limit=10, global-limit=100, etc
> domain1.com: minute-limit=10, hour-limit=100, global-limit=1000, etc
> domain2.com: minute-limit=20, hour-limit=200, global-limit=2000, etc
> 
> the plugin will check in a specific db table if the following exists:
> 
> a) check for user specific limits: db_sasl_user='user1 en domain1.com' -> return limits
> b) check for global domain limits: db_sasl_user='%GLOBAL%@domain1.com' -> return limits
> c) if nothing is found use default limits from config file
> 
> In advance the db limits can use the same label as in <limit label=/> to differentiate limits per time of day as in config.
> 
> If you agree on this I might find some time to do it since I need it in my setup.
> 
> Regards,
> 
> Giannis
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