Re: [OpenSIPS-Users] rtpengine and multiple instances

[olle]

Thanks, sounds like it's time to upgrade 

BR/OLle

-Original Message-
From: Users  On Behalf Of Razvan Crainea
Sent: den 6 oktober 2023 13:13
To: users@lists.opensips.org
Subject: Re: [OpenSIPS-Users] rtpengine and multiple instances

Hi, Olle!

Yes, the offer should be taken by one single node. How it internally 
works is we compute a hash of the callid of the call and based on that hash, 
and we consider that hash a random value to pick one available server. This 
means that as long as the available list does not change, the same server will 
be always picked.
If however the list changes, even the order of the elements in the list change, 
a different node might get chosen. This has been fixed in OpenSIPS 3.2 by the 
rtp_relay module[1].

Setting a 0 weight for a node will do what you said - will be used only in case 
all the other non-0 weighted nodes were tried. All you need to do is to 
provision in the database, or in the script, the weights.

[1] https://opensips.org/docs/modules/3.2.x/rtp_relay.html

Best regards,

Răzvan Crainea
OpenSIPS Core Developer / SIPhub CTO
http://www.opensips-solutions.com / https://www.siphub.com

On 10/6/23 13:10, o...@zaark.com wrote:
> Hi we have seen an issue with rtpengine module in 2.4.
> 
> We ran a setup with two  opensips edge proxies  each having a  local 
> rtpengine running on it.
> 
> When we start using the rtpengines in a cluster, we saw that some 
> commands perhaps in  1-2% of the calls are send to the wrong rtpengine:
> 
> e.g rtpengine_offer() is send to rtpengine instance 1 but
> rtpengine_anser() is send to instant 2 both from same opensips instance.
> 
> I wonder if this is a known issue or what might cause this?
> 
> Our solution for know is to only use the local rtpengine , but I would 
> like the cluster up for redundancy, and this leads to my next question:
> 
> Can you configure with fifo commands so a node is enabled but have 
> weight 0 , and is only used in case the primary node fails?
> 
> BR/Olle
> 
> 
> ___
> Users mailing list
> Users@lists.opensips.org
> http://lists.opensips.org/cgi-bin/mailman/listinfo/users

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Re: [OpenSIPS-Users] rtpengine and multiple instances

[Răzvan Crainea]

Hi, Olle!

Yes, the offer should be taken by one single node. How it 
internally works is we compute a hash of the callid of the call and 
based on that hash, and we consider that hash a random value to pick one 
available server. This means that as long as the available list does not 
change, the same server will be always picked.
If however the list changes, even the order of the elements in the list 
change, a different node might get chosen. This has been fixed in 
OpenSIPS 3.2 by the rtp_relay module[1].


Setting a 0 weight for a node will do what you said - will be used only 
in case all the other non-0 weighted nodes were tried. All you need to 
do is to provision in the database, or in the script, the weights.


[1] https://opensips.org/docs/modules/3.2.x/rtp_relay.html

Best regards,

Răzvan Crainea
OpenSIPS Core Developer / SIPhub CTO
http://www.opensips-solutions.com / https://www.siphub.com

On 10/6/23 13:10, o...@zaark.com wrote:

Hi we have seen an issue with rtpengine module in 2.4.

We ran a setup with two  opensips edge proxies  each having a  local 
rtpengine running on it.


When we start using the rtpengines in a cluster, we saw that some 
commands perhaps in  1-2% of the calls are send to the wrong rtpengine:


e.g rtpengine_offer() is send to rtpengine instance 1 but 
rtpengine_anser() is send to instant 2 both from same opensips instance.


I wonder if this is a known issue or what might cause this?

Our solution for know is to only use the local rtpengine , but I would 
like the cluster up for redundancy, and this leads to my next question:


Can you configure with fifo commands so a node is enabled but have 
weight 0 , and is only used in case the primary node fails?


BR/Olle


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