[OpenSIPS-Users] load_balance not using group id in failure route

[Steven Lam, KeenSystems B.V.]

Hi Răzvan,

Thank you for your answer!
The table was just for illustrating the problem as simple as possible...

What I want to achieve is this: 3 servers for everyday use and 2 servers for fallback, so simple RURI rewriting won't do the trick :-(

Can you tell me what the problem is with resetting the AVPs?

It is good to hear it is not a bug, but this makes me thinking... in this example the resources in all groups are "all". If I change the one from group 2 to "foobar" and then call load_balance in the failure_route like "load_balance("2","foobar")", I get a line telling me resource "foobar" is not found in group 1???

So in a failure_route load_balance does care about the resource and does NOT care about the group number, is this not strange?

Steven

From: users-bounces at lists.opensips.org [mailto:users-bounces at lists.opensips.org] On Behalf Of Razvan Crainea
Sent: dinsdag 3 januari 2012 14:36
To: users at lists.opensips.org
Subject: Re: [OpenSIPS-Users] load_balance not using group id in failure route

Hi, Steven!

This is not wrong, this is the desired behaviour in order to use the failover features.
I see that you have only one destination in group 2. Will this be the final scenario? If yes, then you shouldn't use load balance, but a simple RURI rewriting.
However, if you want to use multiple gateways from failure route, there is a hack you can do, but I don't recommend it. You can reset the lb_mask, lb_id and lb_grp AVPs just before calling the load_balance function.

Regards,


--

Răzvan Crainea

OpenSIPS Developer

On 01/03/2012 02:34 PM, Steven Lam, KeenSystems B.V. wrote:
Is nobody using this? :-(
I really want to know if I'm doing something wrong here...

Steven

From: users-bounces at lists.opensips.org<mailto:users-bounces at lists.opensips.org> [mailto:users-bounces at lists.opensips.org] On Behalf Of Steven Lam, KeenSystems B.V.
Sent: donderdag 29 december 2011 14:48
To: users at lists.opensips.org<mailto:users at lists.opensips.org>
Subject: [OpenSIPS-Users] load_balance not using group id in failure route

Hi all,

Using the load balancer on OpenSIPS 1.7.1 I found that when calling load_balance in a failure_route with a group other than the one on the initial call, the load_balance still uses the "old" group.

For example:

The table looks like this:
+----+----------+------------------+-----------+
| id | group_id | dst_uri          | resources |
+----+----------+------------------+-----------+
|  1 |        1 | sip:192.168.9.22 | all=10    |
|  2 |        1 | sip:192.168.9.27 | all=20    |
|  3 |        2 | sip:192.168.9.18 | all=10    |
+----+----------+------------------+-----------+

Script looks like this:
...
if ( load_balance("1","all") ) {
     xlog("==================> Destination is $du\n");
     t_on_failure("1");
     t_relay();
     exit;
}
...

failure_route[1] {
 lb_disable();
  if ( load_balance("2","all") ) {
    t_on_failure("1");
    xlog("==================> New destination is $du\n");
    t_relay();
  } else {
    t_reply("500","Error");
  }
}

This will result in routing a INVITE to sip:192.168.9.27, when this fails the INVITE will be routed to sip:192.168.9.22 _NOT_ 192.168.9.18. To me this looks wrong.

Is this by design? If so how can I force load_balance to use a uri from group 2 after using one from group 1?

Hope someone can give me some advice on this.

Steven




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