Hello again,

Any advice will be appreciated.

Thanks

чт, 15 сент. 2022 г. в 18:10, Marat Gareev maratkin94@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@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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Hello,

thanks for recommending module *evrexec*.

The problem was solved in the following way

KEMI script: class kamailio: def update(self, msg): while True: _action() time.sleep(60)

def mod_init(): return kamailio()

Kamailio script: loadmodule "evrexec" modparam("evrexec", "exec", "name=evrexec:update;workers=1;")

...

event_route[evrexec:update] { if (!python_exec("update")) { xlog("L_CRITICAL", "Couldn't start update process\n"); } }

thus the process is registered in kamailio and works correctly.

чт, 27 окт. 2022 г. в 11:21, Henning Westerholt hw@gilawa.com:

Hello,

not a KEMI python expert, but what you are trying to do (adding a process to Kamailio and then also maintaining it during run-time) could be probably better done from the C module level.

You can look to the several modules that starts their own children worker processes to get an idea how to do it.

Cheers,

Henning

--

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Kamailio services – https://gilawa.com

*From:* sr-users sr-users-bounces@lists.kamailio.org *On Behalf Of *Marat Gareev *Sent:* Wednesday, October 26, 2022 12:19 PM *To:* miconda@gmail.com *Cc:* Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org *Subject:* Re: [SR-Users] Kill child process created by app_python module

Hello again,

Any advice will be appreciated.

Thanks

чт, 15 сент. 2022 г. в 18:10, Marat Gareev maratkin94@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@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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• sr-users@lists.kamailio.org

Important: keep the mailing list in the recipients, do not reply only to the sender!

Edit mailing list options or unsubscribe:

• https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

--

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www.twitter.com/miconda -- www.linkedin.com/in/miconda