[SR-Users] Kill child process created by app_python module

[Marat Gareev]

Hello again,

Any advice will be appreciated.

Thanks

чт, 15 сент. 2022 г. в 18:10, Marat Gareev <maratkin94 at gmail.com>:

> Hello Daniel,
>
> Probably, the process is not killed, because the child processes of the
> python module are not included in the kamailio children list.
>
> How can I register an event route in KEMI script?
> Doc
> <https://kamailio.org/docs/tutorials/devel/kamailio-kemi-framework/kemi/#python-kemi-interpreter>
> says:
>
>> event route callback - the name of the Python function to be executed
>> instead of module specific event_route blocks is provided via
>> event_callback parameter of that module
>
> but evrexec
> <https://www.kamailio.org/docs/modules/devel/modules/evrexec.html>
> doesn't have an event_callback parameter.
>
> I tried to set up exec parameter (_update is Python function)
> modparam("evrexec", "exec", "name=_update;workers=1;")
> and got warning
> WARNING: evrexec [evrexec_mod.c:180]: evrexec_process(): empty event
> route block [_update]
>
>
> ср, 14 сент. 2022 г. в 16:21, Daniel-Constantin Mierla <miconda at gmail.com
> >:
>
>> Hello,
>>
>> not sure I got right what is the issue and what would be a solution for
>> it, but maybe you can leverage evrexec to create a child process and by
>> that keep it in kamailio children list.
>>
>> Cheers,
>> Daniel
>> On 13.09.22 19:15, Marat Gareev wrote:
>>
>> Hello!
>>
>> I'm trying to use app_python module to perform periodic actions.
>>
>> This is a simple python code
>> def _update():
>> while True:
>> _action()
>> time.sleep(60)
>> class noop_handler:
>> def child_init(self, rank):
>> return 0
>> def ksr_request_route(self, msg):
>> return 1
>> def mod_init():
>> # signal.signal(signal.SIGTERM, signal.default_int_handler)
>> proc = multiprocessing.Process(target=_update)
>> # proc.daemon = True
>> proc.start()
>> ksr.notice('Forked process {} to update\n'.format(proc.pid))
>> return noop_handler()
>>
>> After killing kamailio processes with SIGTERM signal (killall kamailio)
>> I see zombie process.
>> And if I try to process the signal in daemon mode (see the comments in
>> the snippet above), I get critical errors in the logs and still see
>> processes:
>> 0(37001) NOTICE: <core> [core/kemi.c:124]: sr_kemi_core_notice(): Forked
>> process 37002 to update
>> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop(): recvfrom
>> :[4] Interrupted system call
>> Process Process-1:
>> Traceback (most recent call last):
>> File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in
>> _bootstrap
>> self.run()
>> File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
>> self._target(*self._args, **self._kwargs)
>> File "/tmp/script.py", line 155, in _update
>> time.sleep(period)
>> KeyboardInterrupt
>> 0(37001) ALERT: <core> [main.c:774]: handle_sigs(): child process 37002
>> exited normally, status=1
>> 0(37001) INFO: <core> [main.c:802]: handle_sigs(): terminating due to
>> SIGCHLD
>> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop(): recvfrom
>> :[4] Interrupted system call
>> 8(37014) CRITICAL: <core> [core/pass_fd.c:277]: receive_fd(): EOF on 4
>> 1(37003) ERROR: <core> [core/udp_server.c:464]: udp_rcv_loop(): recvfrom
>> :[4] Interrupted system call
>>
>> So, how I can kill child process by SIGTERM signal?
>>
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>> --
>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>>
>>
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