Hi Gunjan,
the ds_select_dst() will just pick the first to be used and prepares the
rest of the available destination (this function does not do any SIP
signaling, it just get the available destinations from the indicated
set). The function returns false only if there is no available (know to
be available) destination in the set.
To have a model, please use the "make menuconfig" to generate a
load-balancer like script using dispatcher - this will give you a hint
on how dispatcher has to be configured for failover.
Regards,
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com
On 23.02.2016 09:29, Gunjan Korlekar wrote:
Hello,
I am new to the dispatcher module on opensips 1.11 and was trying to
understand how failover works in the ds_select_dst function. I tried
searching for answers online but I could not get much clarity.
So, I have a bunch of destinations in my dispatcher table and the
following piece of code in my route function in the config file -
if ( !ds_select_dst("1", "4") ) {
xlog("L_INFO", "ds_select_dst error");
send_reply("500","Unable to route");
}
I have ds_probing_mode set in my config file so it always knows what
destinations are active.
Can you please help in clarifying the following -
Will the ds_select_dst() return a 'False' only after it has tried all
the destinations in the dispatcher table or just the one that gets
selected in the round-robin?
If above is not true and the destination selected by ds_select_dst
turns out to be non reachable, will the above call return False for
the destination that it picks? In such a case can you guide me as to
what I can do so that it selects the next available destination in the
dispatcher list?
What is the default value of 'max_results' in the ds_select_dst()
signature and does it affect failover selection?
Thanks in advance!
--
Thanks,
Gunjan
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