Kamailio and Asterisk in K8s

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H Yavari

3 Mar 2021 3 Mar '21

7:04 p.m.

Hi to all, I am going to run multiple Asterisk instances (Pods) in my Kubernetes cluster. I have a stateless Kamailio sip proxy also. We know that K8s can't handle port range for its services, So we have to use host network for Asterisk deployment. But in this mode, Asterisk pods can't connect to other pods through local IPs and you have to add a second network interface to your pods. One solution is using something like Multus that provides multi-home pods. But it has some issue in host-mode! Also, Using media proxy like RTPEngine in front of Asterisk instances doesn't make a change. You have to run RTPEngine in the host mode or just run it on a VM with multiple NIC.What is the practical solution for this scenario? Thank you. BRHossein

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Julien Klingenmeyer

4 Mar 4 Mar

5:16 p.m.

Hi Hossein,

What do you mean by ‘some issue in host-mode’? We use both Kamailio and RTPEngine in Kubernetes clusters with Multus CNI to manage both private and public interfaces and we have not encountered any issues so far with this configuration.

Kind regards Julien

De : sr-users sr-users-bounces@lists.kamailio.org au nom de H Yavari hyavari@rocketmail.com Répondre à : "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Date : mercredi 3 mars 2021 à 20:05 À : "Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org Objet : [SR-Users] Kamailio and Asterisk in K8s

Hi to all,

I am going to run multiple Asterisk instances (Pods) in my Kubernetes cluster. I have a stateless Kamailio sip proxy also. We know that K8s can't handle port range for its services, So we have to use host network for Asterisk deployment. But in this mode, Asterisk pods can't connect to other pods through local IPs and you have to add a second network interface to your pods. One solution is using something like Multus that provides multi-home pods. But it has some issue in host-mode!

Also, Using media proxy like RTPEngine in front of Asterisk instances doesn't make a change. You have to run RTPEngine in the host mode or just run it on a VM with multiple NIC. What is the practical solution for this scenario?

Thank you.

BR Hossein

David Villasmil

8:59 p.m.

So here's my rtpengine conf:

[rtpengine] interface=internal/[PRIVATE_IP];external/[PRIVATE_IP]![PUBLIC_IP] foreground=true log-stderr=true listen-ng=[PRIVATE_IP]:22222 port-min=23000 port-max=32768 recording-dir=/tmp recording-method=pcap recording-format=eth log-level=6 delete-delay=0

and in Kamailio, you listen on 2 ports, one for the public side, the other for the private:

listen=LISTEN_PRIVATE_PROTO:LISTEN_PRIVATE_IF:LISTEN_PRIVATE_PORT advertise ADVERTISE_IP:ADVERTISE_PORT listen=LISTEN_PRIVATE_PROTO:LISTEN_PRIVATE_IF:5080

This is basically my setup, it should be straightforward.

[image: Screenshot 2021-03-04 at 20.58.47.png] Hope that helps

Regards, David Villasmil email: david.villasmil.work@gmail.com phone: +34669448337

On Thu, Mar 4, 2021 at 5:18 PM Julien Klingenmeyer < julien.klingenmeyer@ovhcloud.com> wrote:

...

Hi Hossein,

What do you mean by ‘some issue in host-mode’?

We use both Kamailio and RTPEngine in Kubernetes clusters with Multus CNI to manage both private and public interfaces and we have not encountered any issues so far with this configuration.

Kind regards

Julien

*De : *sr-users sr-users-bounces@lists.kamailio.org au nom de H Yavari < hyavari@rocketmail.com> *Répondre à : *"Kamailio (SER) - Users Mailing List" < sr-users@lists.kamailio.org> *Date : *mercredi 3 mars 2021 à 20:05 *À : *"Kamailio (SER) - Users Mailing List" sr-users@lists.kamailio.org *Objet : *[SR-Users] Kamailio and Asterisk in K8s

Hi to all,

I am going to run multiple Asterisk instances (Pods) in my Kubernetes cluster. I have a stateless Kamailio sip proxy also. We know that K8s can't handle port range for its services, So we have to use host network for Asterisk deployment. But in this mode, Asterisk pods can't connect to other pods through local IPs and you have to add a second network interface to your pods. One solution is using something like Multus that provides multi-home pods. But it has some issue in host-mode!

Also, Using media proxy like RTPEngine in front of Asterisk instances doesn't make a change. You have to run RTPEngine in the host mode or just run it on a VM with multiple NIC.

What is the practical solution for this scenario?

Thank you.

BR

Hossein _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

H Yavari

5 Mar 5 Mar

5:54 p.m.

Thank you so much David for sharing this.I am on the same architecture. It seems I should spend more time on inserting Multus in GKE and run RTPe in host mode. Regards,Hossein

On Thursday, March 4, 2021, 10:39:12 PM PST, David Villasmil david.villasmil.work@gmail.com wrote:

So here's my rtpengine conf: [rtpengine] interface=internal/[PRIVATE_IP];external/[PRIVATE_IP]![PUBLIC_IP] foreground=true log-stderr=true listen-ng=[PRIVATE_IP]:22222 port-min=23000 port-max=32768 recording-dir=/tmp recording-method=pcap recording-format=eth log-level=6 delete-delay=0

and in Kamailio, you listen on 2 ports, one for the public side, the other for the private: listen=LISTEN_PRIVATE_PROTO:LISTEN_PRIVATE_IF:LISTEN_PRIVATE_PORT advertise ADVERTISE_IP:ADVERTISE_PORT listen=LISTEN_PRIVATE_PROTO:LISTEN_PRIVATE_IF:5080

This is basically my setup, it should be straightforward.

Hope that helps Regards, David Villasmilemail: david.villasmil.work@gmail.comphone: +34669448337

On Thu, Mar 4, 2021 at 5:18 PM Julien Klingenmeyer julien.klingenmeyer@ovhcloud.com wrote:

Hi Hossein,

What do you mean by ‘some issue in host-mode’?

We use both Kamailio and RTPEngine in Kubernetes clusters with Multus CNI to manage both private and public interfaces and we have not encountered any issues so far with this configuration.

Kind regards

Julien

Hi to all,

Also, Using media proxy like RTPEngine in front of Asterisk instances doesn't make a change. You have to run RTPEngine in the host mode or just run it on a VM with multiple NIC.

What is the practical solution for this scenario?

Thank you.

Hossein _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

H Yavari

3:45 a.m.

Hi Julien, Thanks. I have an issue to set host-device in Multus on GKE. Is it possible to share a sample of your configuration? Regards,Hossein On Thursday, March 4, 2021, 09:17:23 AM PST, Julien Klingenmeyer julien.klingenmeyer@ovhcloud.com wrote:

Hi Hossein,

What do you mean by ‘some issue in host-mode’?

We use both Kamailio and RTPEngine in Kubernetes clusters with Multus CNI to manage both private and public interfaces and we have not encountered any issues so far with this configuration.

Kind regards

Julien

Hi to all,

Also, Using media proxy like RTPEngine in front of Asterisk instances doesn't make a change. You have to run RTPEngine in the host mode or just run it on a VM with multiple NIC.

What is the practical solution for this scenario?

Thank you.

Hossein _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

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David Villasmil
H Yavari
Julien Klingenmeyer