[OpenSIPS-Users] Dialog module - profile replication not working

[John Quick]

Hello Liviu,

Thanks for responding to my query.

The setup we have is active-active.  The cluster size is 2.
The requirement is to be able to count, and limit, the total number of calls made by each user account.
So if a particular user is allowed to make a total of 15 concurrent calls, this limit needs to be enforced as soon as the total number of calls through *both* servers exceeds 15.

I have no need to replicate dialogs and can most certainly omit the modparam lines that initiate dialog replication.

However, I now wonder if my method of testing is valid?
I was thinking that "opensipsctl fifo profile_get_values concurrent" would show me values for both servers as soon as a call was established on either server.

We might be able to upgrade to v2.3 if it is essential, but we had standardised deployment and server builds using debian packages from the repository "deb http://apt.opensips.org jessie 2.2-releases". Version 2.2 was the most up-to-date stable release when we started this project and it is still a supported version. I can see that a complex backport is not desireable for the developers but please can you help us to at least work around the known issues if possible.

Regards
John Quick
Smartvox Limited


> Hi, John!
>
> First of all, this is a known issue [1] with the 2.2 clusterer, where 
> you cannot use both replication mechanisms of dialog concurrently. This 
> has been fixed in 2.3 and above, and required a significant code 
> refactoring, which is unlikely to get backported soon.
>
> Secondly, what you are trying to do is unlikely to solve your problem 
> even with 2.3+, as the dialog replication mechanism __already__ 
> broadcasts the profiles of each box throughout its cluster. 
> Consequently, reusing the same cluster id to share the profiles between 
> boxes (yet again) will effectively double the value of each profile. If 
> I correctly understand your intention, simply enabling dialog 
> replication (profile included) will solve your problem. Please correct 
> me if I'm wrong.
>
> The documentation could use some improvements in order to reflect the 
> following (I will take care of this):
>
>     * dialog replication allows you to have "hot backups". Profiles are 
>  included. Recommended cluster size: 2
>
>     * profile replication is meant to be used in 
>  active-active-...-active setups, in order to easily achieve whatever 
> platform-wide limitations you may think of. The OpenSIPS cluster size 
> can grow indefinitely here.
> 
> Some food for thought: currently in OpenSIPS 2.3+, although merging the 
> above two concepts will work, the profiles are likely to be counted more 
> than once, and your limits will hit faster. The clusterer needs more 
> love in order to support "profile sharing between highly available 
> clusters".
>
> Best regards,
>
> [1]: https://github.com/OpenSIPS/opensips/issues/938
>
> Liviu Chircu
> OpenSIPS Developer
> http://www.opensips-solutions.com