To your failure_route used for dispatcher rollover, add:
if(t_check_status(“407|401”))
exit;
This will allow the 401/407 challenge to be fed back to the original caller.
— Alex
> On Mar 13, 2023, at 8:27 PM, Jawaid Bazyar <[email protected]> wrote:
>
> Hi Alex,
>
> I did try round-robin, but it has a different issue, which is that calls from
> a handset through the Kamailio to say asterisk1, trigger authentication
> challenge, then when the auth comes back from the client, Kam decides that's
> a failure, goes into the failover logic, and it round robins the client's
> auth to the -other- asterisk asterisk2, which then rejects the auth attempt
> as having a stale nonce (which is right, since it came from the other
> asterisk).
>
> I haven't yet figured out how to keep affinity for the same asterisk except
> by routing based on CallID.
>
> I guess the other option would be to tell Dispatcher that 401 Auth is not a
> 'failure'. If I can figure that out, then I can try with round robin.
>
> Jawaid
>
> --
>
>
> On 3/13/23, 6:09 PM, "Alex Balashov" <[email protected]
> <mailto:[email protected]>> wrote:
>
>
> I wonder if the distribution algorithm you have chosen behaves differently in
> this regard. Have you tried plain round-robin (i.e. #4)?
>
>
>> On Mar 13, 2023, at 6:59 PM, Jawaid Bazyar <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Hi,
>>
>> Maybe it would be easier to explain my expectations on how it's supposed to
>> work, and then you can tell me where I'm making a wrong assumption __
>>
>> So, load balancers like haproxy etc perform "health checks" on the service
>> being balanced. In this case, I have it setup for Kamailio to send OPTIONS
>> and I do in fact see those packets and 200 OK responses. And if haproxy sees
>> a host is down, it immediately stops trying to send client requests to that
>> host.
>>
>> In this case, after 10 successful OPTIONS pings, Kamailio marks the
>> destination as AP and everything is fine, Kamailio correctly returns the
>> destination in ds_select_dst.
>>
>> I have the settings below, so that if the service misses 5 OPTIONS checks,
>> Kamailio should mark that destination as "inactive".
>> But, it should keep probing it, so Kamailio can detect when the destination
>> comes back up. So as I understand it, that's the status "IP".
>>
>> And, Kamailio should stop including that destination in the responses from
>> ds_select_dst().
>>
>> And all of that is behaving as expected, EXCEPT that last bit -
>> ds_select_dst continues to include the IP (inactive) destination in
>> responses.
>>
>> I added
>>
>> ds_mark_dst("ip");
>>
>> in the event of a 500 or branch failure response, but I don't understand why
>> this is needed, because the destination is already in "IP" mode.
>>
>> So seemingly Kamailio knows the destination is inactive, but ds_select_dst
>> isn't acting on it unless I manually mark the target also.
>>
>> Perhaps I am overlooking an option?
>>
>> Regards,
>>
>> Jawaid
>>
>>
>> On 3/13/23, 9:51 AM, "Henning Westerholt" <[email protected]
>> <mailto:[email protected]> <mailto:[email protected] <mailto:[email protected]>>>
>> wrote:
>>
>>
>> Hello,
>>
>>
>> probing means in this context sending OPTIONS pings, yes.
>>
>>
>> In mode 1 you can disable the probing by setting flag 4 to the destination
>> in the dispatcher file, according to the docs.
>>
>>
>> Cheers,
>>
>>
>> Henning
>>
>>
>> -----Original Message-----
>> From: Henning Westerholt <[email protected] <mailto:[email protected]>
>> <mailto:[email protected] <mailto:[email protected]>>>
>> Sent: Montag, 13. März 2023 15:55
>> To: Kamailio (SER) - Users Mailing List <[email protected]
>> <mailto:[email protected]> <mailto:[email protected]
>> <mailto:[email protected]>>>
>> Subject: [SR-Users] Re: Dispatcher behavior
>>
>>
>> Hello,
>>
>>
>> not sure what the "auto-probing" mode is, but you can configure the
>> dispatcher OPTIONS ping behaviour with that parameter:
>>
>>
>> https://kamailio.org/docs/modules/5.5.x/modules/dispatcher.html#dispatcher.p.ds_probing_mode
>>
>> <https://kamailio.org/docs/modules/5.5.x/modules/dispatcher.html#dispatcher.p.ds_probing_mode>
>>
>> <https://kamailio.org/docs/modules/5.5.x/modules/dispatcher.html#dispatcher.p.ds_probing_mode>
>>
>> <https://kamailio.org/docs/modules/5.5.x/modules/dispatcher.html#dispatcher.p.ds_probing_mode>>
>>
>>
>> Cheers,
>>
>>
>> Henning
>>
>>
>> -----Original Message-----
>> From: Jawaid Bazyar <[email protected] <mailto:[email protected]>
>> <mailto:[email protected] <mailto:[email protected]>>>
>> Sent: Montag, 13. März 2023 14:33
>> To: Kamailio (SER) - Users Mailing List <[email protected]
>> <mailto:[email protected]> <mailto:[email protected]
>> <mailto:[email protected]>>>
>> Subject: [SR-Users] Re: Dispatcher behavior
>>
>>
>> Hi Alex,
>>
>>
>> I don't see "auto-probing" in the documentation.. here is my dispatcher
>> config that I snatched from somewhere on the Internet.
>>
>>
>> modparam("dispatcher", "db_url", "mysql://xxxxxxx/kamailio") #Use DBURL
>> variable for database parameters
>> modparam("dispatcher", "flags", 2) # If flag 2 is set, then the failover
>> support is enabled.
>> modparam("dispatcher", "table_name", "dispatcher")
>> modparam("dispatcher", "ds_ping_interval", 5) #How often to ping
>> destinations to check status
>> modparam("dispatcher", "ds_ping_method", "OPTIONS") #Send SIP Options ping
>> modparam("dispatcher", "ds_probing_threshold", 5) #How many failed pings in
>> a row do we need before we consider it down
>> modparam("dispatcher", "ds_inactive_threshold", 10) #How many sucessful
>> pings in a row do we need before considering it up
>> modparam("dispatcher", "ds_ping_latency_stats", 1) #Enables stats on latency
>> modparam("dispatcher", "ds_probing_mode", 1) #Keeps pinging gateways when
>> state is known (to detect change in state)
>>
>>
>>
>>
>>
>>
>> On 3/12/23, 8:28 PM, "Alex Balashov" <[email protected]
>> <mailto:[email protected]> <mailto:[email protected]
>> <mailto:[email protected]>> <mailto:[email protected]
>> <mailto:[email protected]> <mailto:[email protected]
>> <mailto:[email protected]>>>> wrote:
>>
>>
>>
>>
>> Unless you have auto-probing enabled, yes.
>>
>>
>>
>>
>>> On Mar 12, 2023, at 9:14 PM, Jawaid Bazyar <[email protected]
>>> <mailto:[email protected]> <mailto:[email protected]
>>> <mailto:[email protected]>> <mailto:[email protected]
>>> <mailto:[email protected]> <mailto:[email protected]
>>> <mailto:[email protected]>>>> wrote:
>>>
>>> Hi, is this expected behavior?
>>> I have two target hosts in a dispatcher set, 10.20.20.118 (prio 5) and
>>> 10.20.20.252 (prio 10).
>>> When I have 10.20.20.252 turned off, dispatcher still tries to send packets
>>> to that host, even when the status flags are IP.
>>> root@vs-rs01:/etc/kamailio# kamcmd dispatcher.list {
>>> NRSETS: 1
>>> RECORDS: {
>>> SET: {
>>> ID: 1
>>> TARGETS: {
>>> DEST: {
>>> URI: sip:10.20.20.252:5060
>>> FLAGS: IP
>>> PRIORITY: 10
>>> LATENCY: {
>>> AVG: 0.000000
>>> STD: 0.000000
>>> EST: 0.000000
>>> MAX: 0
>>> TIMEOUT: 62
>>> }
>>> }
>>> DEST: {
>>> URI: sip:10.20.20.118:5060
>>> FLAGS: AP
>>> PRIORITY: 5
>>> LATENCY: {
>>> AVG: 3.876000
>>> STD: 2.965000
>>> EST: 5.058000
>>> MAX: 14
>>> TIMEOUT: 0
>>> }
>>> }
>>> }
>>> }
>>> }
>>> }
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>>
>>
>>
>>
>>
>>
>>
>> --
>> Alex Balashov
>> Principal Consultant
>> Evariste Systems LLC
>> Web: https://evaristesys.com <https://evaristesys.com>
>> <https://evaristesys.com> <https://evaristesys.com>>
>> <https://evaristesys.com> <https://evaristesys.com>>
>> <https://evaristesys.com>> <https://evaristesys.com&gt;>>
>> Tel: +1-706-510-6800
>>
>>
>>
>>
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>
> --
> Alex Balashov
> Principal Consultant
> Evariste Systems LLC
> Web: https://evaristesys.com <https://evaristesys.com>
> Tel: +1-706-510-6800
>
>
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> To unsubscribe send an email to [email protected]
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Principal Consultant
Evariste Systems LLC
Web: https://evaristesys.com
Tel: +1-706-510-6800
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