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 <baz...@gmail.com> 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" <h...@gilawa.com
> <mailto:h...@gilawa.com>> 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 <h...@gilawa.com <mailto:h...@gilawa.com>>
> Sent: Montag, 13. März 2023 15:55
> To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org
> <mailto:sr-users@lists.kamailio.org>>
> 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>
>
>
> Cheers,
>
>
> Henning
>
>
> -----Original Message-----
> From: Jawaid Bazyar <baz...@gmail.com <mailto:baz...@gmail.com>>
> Sent: Montag, 13. März 2023 14:33
> To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org
> <mailto:sr-users@lists.kamailio.org>>
> 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" <abalas...@evaristesys.com
> <mailto:abalas...@evaristesys.com> <mailto:abalas...@evaristesys.com
> <mailto:abalas...@evaristesys.com>>> wrote:
>
>
>
>
> Unless you have auto-probing enabled, yes.
>
>
>
>
>> On Mar 12, 2023, at 9:14 PM, Jawaid Bazyar <baz...@gmail.com
>> <mailto:baz...@gmail.com> <mailto:baz...@gmail.com
>> <mailto:baz...@gmail.com>>> 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>>
> Tel: +1-706-510-6800
>
>
>
>
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--
Alex Balashov
Principal Consultant
Evariste Systems LLC
Web: https://evaristesys.com
Tel: +1-706-510-6800
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