[SR-Users] Dispatcher question
Joel Serrano
joel at textplus.com
Sat Sep 1 21:02:08 CEST 2018
If it brings the failed it’s because when it was marked as disabled that
node was already in the list, so it will fail and hit the failure route
again and move to next node.
The next call of ds_select_dst (in request route) will populate a list
without disabled nodes, etc.
To summarize:
- In request route call ds_select_dst()
- if it fails, in failed_route call ds_mark_dst() and then ds_next_dst()
Example:
...to keep it easy to understand, let's pretend that dispatcher doesn't
load balance and just failsover, let's say you have a ds group of nodes A,
B and C...
- INVITE 1 received. ds_select_dst() (the list contains A, B, C). $du=A
- INVITE 2 received. ds_select_dst() (the list contains A, B, C). $du=A
- A dies.
- INVITE 1 in failure route, A is maked as disabled, ds_next_dst() (updated
list contains B and C). $du=B
- INVITE 3 received, ds_select_dst() (the list contains B, C). $du=B
- INVITE 2 in failure route, A is already marked as disabled, ds_next_dst()
(updated list contains B and C). $du=B
- ...people talk via server B because A failed...
So really you would only send calls that populated the dispather list
before dying, after that the next calls wouldn't even try to hit that
server.
Can you give some more details on what kind of failover you are trying to
achieve?
Joel.
On Sat, Sep 1, 2018 at 11:06 Igor Olhovskiy <igorolhovskiy at gmail.com> wrote:
> Hi!
> I’ve used
> ds_select_dst() and ds_next_dst() one after another in failure route.
> If use in request/failure it’s working ok.
>
> But again, during the failover in my environment dispatcher list can
> change. And I don’t want to rely on ds_next_dst() cause it can bring me
> absent node.
> So, I’ve been thinking of use xavp variable to get data from it, but still
> can’t get it to work.
>
> Regards, Igor
> On Sep 1, 2018, 4:33 PM +0200, Joel Serrano <joel at textplus.com>, wrote:
>
> I think you are confused between:
>
> ds_select_dst() = get a node from the dispatcher group based on weight and
> priority. Use in request_route.
>
> ds_next_dst() = get the next node from the list previously created with
> ds_select_dst(). Use this in failure_route.
>
> Give it a try and let us know.
>
> On Sat, Sep 1, 2018 at 00:27 Igor Olhovskiy <igorolhovskiy at gmail.com>
> wrote:
>
>> Is there any way to select not first destination from ds_select_dst()?
>> Could not find any way to do this...
>>
>> Regards, Igor
>> On Sep 1, 2018, 12:13 AM +0200, Joel Serrano <joel at textplus.com>, wrote:
>>
>> Sorry, hit sent too soon.
>>
>> I meant ds_next_dst() or ds_next_domain():
>>
>> https://kamailio.org/docs/modules/5.1.x/modules/
>> dispatcher.html#idp44172212
>>
>> On Fri, Aug 31, 2018 at 3:06 PM, Joel Serrano <joel at textplus.com> wrote:
>>
>>> Try with ds_select_next() in failure_route[]
>>>
>>> On Fri, Aug 31, 2018 at 06:17 Igor Olhovskiy <igorolhovskiy at gmail.com>
>>> wrote:
>>>
>>>> Tried other way round
>>>> All of this is happening in FAILURE ROUTE.
>>>>
>>>> ds_mark_dst("d");
>>>> ds_select_dst("1", "0")
>>>>
>>>> But ds_select_dst still selecting for me gateway already marked with
>>>> "d" on previous step. Seems, it applying states after packet sent. And any
>>>> other way I can select new dst from set?
>>>>
>>>> Idea why I'm using ds_select_dst in FAILURE_ROUTE and not
>>>> ds_next_dst() that during failover timer dispatcher list could change (yes,
>>>> it could be extensive process) and I want to use most fresh version.
>>>>
>>>> 2018-08-31 13:05 GMT+02:00 Igor Olhovskiy <igorolhovskiy at gmail.com>:
>>>>
>>>>> Made a pv_xavp_print() afrer ds_select_dst
>>>>>
>>>>> Seems both destinations are there.
>>>>>
>>>>>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc835288 (level=0)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dsctx_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 1427193258
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc834ed8>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc834ed8 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: cnt
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7279890
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc834ed8 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dispacher_dst_list_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 508490514
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc834d78>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc834d78 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: grp
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7056653
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: uri
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 8122237
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:558]: xavp_print_list_content():
>>>>> XAVP value: sip:172.28.0.12:5060
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc834d78 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dispacher_dst_list_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 508490514
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc834f80>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc834f80 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: grp
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7056653
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: uri
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 8122237
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:558]: xavp_print_list_content():
>>>>> XAVP value: sip:172.28.0.19:5060
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc834f80 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dsctx_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 1427193258
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc833db0>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc833db0 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: cnt
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7279890
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc833db0 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dispacher_dst_list_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 508490514
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc833b80>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc833b80 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: grp
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7056653
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: uri
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 8122237
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:558]: xavp_print_list_content():
>>>>> XAVP value: sip:172.28.0.19:5060
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc833b80 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dispacher_dst_list_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 508490514
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc833960>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc833960 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: grp
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7056653
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: uri
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 8122237
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:558]: xavp_print_list_content():
>>>>> XAVP value: sip:172.28.0.12:5060
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc833960 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dsctx_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 1427193258
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc835670>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc835670 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: cnt
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7279890
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc835670 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: _dispacher_dst_list_
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 508490514
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 6
>>>>> 13(23) INFO: <core> [core/xavp.c:571]: xavp_print_list_content():
>>>>> XAVP value: <xavp:0x7f8bfc833580>
>>>>> 13(23) INFO: <core> [core/xavp.c:543]: xavp_print_list_content():
>>>>> +++++ start XAVP list: 0x7f8bfc833580 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: grp
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 7056653
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 1
>>>>> 13(23) INFO: <core> [core/xavp.c:555]: xavp_print_list_content():
>>>>> XAVP value: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:547]: xavp_print_list_content():
>>>>> *** XAVP name: uri
>>>>> 13(23) INFO: <core> [core/xavp.c:548]: xavp_print_list_content():
>>>>> XAVP id: 8122237
>>>>> 13(23) INFO: <core> [core/xavp.c:549]: xavp_print_list_content():
>>>>> XAVP value type: 2
>>>>> 13(23) INFO: <core> [core/xavp.c:558]: xavp_print_list_content():
>>>>> XAVP value: sip:172.28.0.46:5060
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc833580 (level=1)
>>>>> 13(23) INFO: <core> [core/xavp.c:583]: xavp_print_list_content():
>>>>> ----- end XAVP list: 0x7f8bfc835288 (level=0)
>>>>> …
>>>>> call ds_next_dst() here
>>>>> …
>>>>> 13(23) WARNING: dispatcher [dispatch.c:2285]: ds_update_dst(): no xavp
>>>>> uri field in next destination record
>>>>>
>>>>> 2018-08-31 12:33 GMT+02:00 Daniel Tryba <d.tryba at pocos.nl>:
>>>>>
>>>>>> On Fri, Aug 31, 2018 at 12:11:53PM +0200, Igor Olhovskiy wrote:
>>>>>> > Can I somehow dump xavp_dst var to check if ds_select_dst is
>>>>>> correct?
>>>>>>
>>>>>> You could use pv_xavp_print():
>>>>>> https://www.kamailio.org/docs/modules/5.1.x/modules/pv.html#
>>>>>> pv.f.pv_xavp_print
>>>>>>
>>>>>> If there is a better way I'd like to know myself.
>>>>>>
>>>>>> _______________________________________________
>>>>>> Kamailio (SER) - Users Mailing List
>>>>>> sr-users at lists.kamailio.org
>>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Best regards,
>>>>> Igor
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Best regards,
>>>> Igor
>>>> _______________________________________________
>>>> Kamailio (SER) - Users Mailing List
>>>> sr-users at lists.kamailio.org
>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
> _______________________________________________
> Kamailio (SER) - Users Mailing List
> sr-users at lists.kamailio.org
> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.kamailio.org/pipermail/sr-users/attachments/20180901/f05de7da/attachment.html>
More information about the sr-users
mailing list