[OpenSIPS-Users] [RFC] Default value of db_url in OpenSIPS

Bogdan-Andrei Iancu bogdan at opensips.org
Fri Apr 15 10:40:58 CEST 2011

Hi Henk,

As each module can have its own DB URL, I do not see a problem here - 
you can create separate URL, pointing to the 2 different DBs (real and 
In your case the setup is a bit different as you are using different DBs 
- in what we were discussion is about keeping RW and RO separate mysql 
users for accessing the same DB.


On 04/15/2011 01:03 AM, Henk Hesselink wrote:
> Definitely 1 vote for making the URL explicit.  Principle of least
> surprise and all that.
> I'd also like to vote for keeping the rw/ro split.  We don't use it for
> security but for performance: modules that need to write to the database
> get a rw URL pointing at the real DB, the rest gets a ro URL pointing to
> a caching copy.
> Regards,
> Henk
> On 4/14/11 4:35 PM, Bogdan-Andrei Iancu wrote:
>> On 04/14/2011 05:25 PM, Ovidiu Sas wrote:
>>> On Thu, Apr 14, 2011 at 10:18 AM, Bogdan-Andrei Iancu
>>> <bogdan at opensips.org> wrote:
>>>> On 04/14/2011 03:15 PM, Saúl Ibarra Corretgé wrote:
>>>>> On 14/4/11 1:02 PM, Bogdan-Andrei Iancu wrote:
>>>>>> Hi all,
>>>>>> Following some discussions on the value of db_url, we end up with 
>>>>>> the
>>>>>> idea of chancing the way of definition the db_url in opensips.
>>>>>> The problem with the current approach (having builtin - hidden-
>>>>>> default
>>>>>> values) is confusing as, if you do no explicitly set a db_url, the
>>>>>> modules will try do connect to the default db_url, without you even
>>>>>> knowing that.
>>>>>> So the idea is to remove the builtin default value and to have a new
>>>>>> global parameter in opensips cfg to define the default value for
>>>>>> db_urls.
>>>>>> This will allow:
>>>>>> - to have single default db_url for simple default scripts (as we
>>>>>> have now)
>>>>>> - to see (no mote hidden) the default value for db_url in your cfg
>>>>>> - to change the default db_url without re-compilling
>>>>>> - still be able to individually change the db_urls for each 
>>>>>> module...
>>>>>> Already there are three +votes for this, but I would like to see 
>>>>>> other
>>>>>> opinions on that....pro or against :)
>>>>> +1
>>>>> Would this global db_url be overridable with the per-module one, 
>>>>> or are
>>>>> they mutually exclusive?
>>>> per module (if defined in script) will override the global one (for 
>>>> that
>>>> module).
>>> And if there's no per-module defined and no global defined, then the
>>> init will fail with proper error message, right?
>> If the module really requires a db, then it will fail to start.
>>> Also, we may want to have two global urls:
>>> - one r/w for modules that require writing to the db;
>>> - one r/o for modules that require only reading from db.
>> Does it make sense to keep this separation between RW and RO ?
>> personally I never used it...somehow is non-sense (as security) for a
>> single application to connect in the same time, to the same DB with RW
>> and RO (for different modules).....my 2 cents..
>> Regards,
>> Bogdan

Bogdan-Andrei Iancu
OpenSIPS eBootcamp - 2nd of May 2011
OpenSIPS solutions and "know-how"

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