<div dir="auto">The problem with kubernetes and freeswitch and the like running inside docker (for example for testing) is the NAT later. You can easily end up with multiple layers of NAT.<div dir="auto"><br></div><div dir="auto">The problem with running these applications on kubernetes is the fact that k8s is designed and built around TCP traffic, not UDP. In addition to exposing only traffic by default to other pods inside the cluster. If you want to give access to to the nodes from outside, you either have to use only TCP traffic in which case a standard Service with a LoadBalancer should work from a raw networking perspective, however this does make issuing re-invites problematic due to all nodes being exposed with a single external IP set (depending on load balancer).</div><div dir="auto">The next problem will be the RTP traffic over UDP, in k8s you cannot expose a range of ports in a pod template, which means you need to expose each port individually in the pod template, the service definitions, etc...</div><div dir="auto">but these can be portmapped with external ports not matching the internal port the pod received traffic on.</div><div dir="auto">You "could" solve this using NodePort type service definition, but then you have a limit of one node can only run one pod, because the ports cannot be used by multiple instances and you'd need to define pod anti affinity rules and other ways of sorting which pods can live on which nodes.</div><div dir="auto"><br></div><div dir="auto">There are many many problems regarding networking with UDP traffic on k8s, before you step into the ipv6 & ipv4 dual stack functionality (which is in alpha as of k8s 1.16, before that you have to choose one up stack to use).</div><div dir="auto"><br></div><div dir="auto">And that doesn't even step into the problems you can find with no-root privilege pods, network security policies, namespaces, RBAC, pod security policies, etc.</div><div dir="auto"><br></div><div dir="auto">The advantages of course are you can easily dynamically scale up/down your capacity as needed using suitable metrics and pod scaling systems (manual or automatic).</div><div dir="auto">You can easily leverage A/B testing with multiple deployments. There are many many benefits.</div><div dir="auto"><br></div><div dir="auto">I would say.. run OpenSIPS/freeswitch/asterisk outside of k8s, run everything else inside since TCP, HTTP and the like is a lot easier to deal with.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 3 May 2020, 01:20 H Yavari via Users, <<a href="mailto:users@lists.opensips.org">users@lists.opensips.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div></div>
<div dir="ltr">Honestly, I see this topic also when people are comparing these for telephony services like AS/FS and etc.</div><div dir="ltr"><br></div><div dir="ltr">My knowledge isn't much deep about LXC. But you can see this battle here also: <br></div><div dir="ltr"><a href="https://community.freepbx.org/t/unofficial-docker-image-of-freepbx-15-asterisk-16-izpbx-project/66357/10" rel="nofollow noreferrer" target="_blank">https://community.freepbx.org/t/unofficial-docker-image-of-freepbx-15-asterisk-16-izpbx-project/66357/10</a></div><div dir="ltr"><br></div><div dir="ltr">Need other's idea about it.</div><div dir="ltr"><br></div><div dir="ltr">Regards,</div><div dir="ltr">HYavari<br></div><div dir="ltr"><br></div><div><br></div>
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On Saturday, May 2, 2020, 5:35:27 PM GMT+4:30, Saint Michael <<a href="mailto:venefax@gmail.com" target="_blank" rel="noreferrer">venefax@gmail.com</a>> wrote:
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<div><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268"><div><div dir="ltr"><div style="font-size:small">The ideal platform to run opensips, asterisk, etc. is LXC containers, not docker. Unless I misunderstand docker, you may only dockerize applications, while in LXC you conteinarize the equivalent of full virtual machines, all apps together as a unit. Performance is identical to docker, for both use the same technology at the kernel level.</div><div style="font-size:small">Please correct me if I am wrong.</div></div><br clear="none"><div><div dir="ltr">On Sat, May 2, 2020 at 8:34 AM David Villasmil <<a shape="rect" href="mailto:david.villasmil.work@gmail.com" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div>They all get their dialplan/config from an API backend. They’re DB agnostic.</div></div><div><br clear="none"><div><div dir="ltr">On Sat, 2 May 2020 at 13:28, H Yavari <<a shape="rect" href="mailto:hyavari@rocketmail.com" rel="nofollow noreferrer" target="_blank">hyavari@rocketmail.com</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div><div></div>
<div dir="ltr">Thank you David,</div><div dir="ltr">Interested to know, you are running a cluster/group of FS with centralized DB, with same functionality?</div><div dir="ltr"><br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Regards,</div><div dir="ltr">HYavari<br clear="none"></div><div dir="ltr"><br clear="none"></div><div><br clear="none"></div>
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On Saturday, May 2, 2020, 4:54:01 PM GMT+4:30, David Villasmil <<a shape="rect" href="mailto:david.villasmil.work@gmail.com" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a>> wrote:
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<div><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011"><div><div><div>Hello,</div><div><br clear="none"></div><div>I have never run into those problems. The people I’ve seen running into them are doing thousands upon thousands of packets por seconds. Hardware is cheap nowadays, I just spread the load.</div><div><br clear="none"></div><div>I wouldn’t dockerize rtpengine, although I know people who do. </div><div><br clear="none"></div><div>In a normal setup probably you won’t run into them, we run freeswitch on containers for production without a hitch (I must stress I was very reluctant to do that a few years ago, but docker has come a long way since then).</div><div><br clear="none"></div><div>David</div></div><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011yqt70632"><div><br clear="none"><div><div dir="ltr">On Sat, 2 May 2020 at 12:42, H Yavari <<a shape="rect" href="mailto:hyavari@rocketmail.com" rel="nofollow noreferrer" target="_blank">hyavari@rocketmail.com</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:Helvetica,Arial,sans-serif;font-size:13px"><div style="font-family:Helvetica,Arial,sans-serif"></div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Thank you David.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">What do you think about networking concerns? you mentioned to them but I didn't get your point.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">RTP restrictions, port proxy, iptables, fail2ban are top ones.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">PS: No matter which telephony platform (Asterisk/FS/OpenSIPS/Kamailio), these concerns are in general.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">PS: We have more challenges with projects like Freepbx.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Regards,</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">HY<br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div>
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On Saturday, May 2, 2020, 3:48:11 PM GMT+4:30, David Villasmil <<a shape="rect" href="mailto:david.villasmil.work@gmail.com" style="font-family:Helvetica,Arial,sans-serif" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a>> wrote:
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<div style="font-family:Helvetica,Arial,sans-serif"><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616" style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">Not sure about OpenSIPS specifically, but I would assume it has been implemented in docker just as much as kamailio and freeSWITCH/Asterisk.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">This is done all over the world. Docker is not an emulator or a virtual machine host. When you run something on docker, its speed is (almost) exactly the same as running it on the host itself, since there’s no OS overhead, it works by separating processes via Cgroups, no by virtualizing or emulating hardware.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">Quote:</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif"><span style="font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(21,21,21)">The Docker technology uses the </span><a shape="rect" href="https://www.redhat.com/en/topics/linux/what-is-the-linux-kernel" style="text-decoration-line:none;text-decoration-style:solid;text-decoration-color:currentcolor;font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(0,102,204)" rel="nofollow noreferrer" target="_blank">Linux kernel</a><span style="font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(21,21,21)"> and features of the kernel, like </span><a shape="rect" href="https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Resource_Management_Guide/ch01.html" style="text-decoration-line:none;text-decoration-style:solid;text-decoration-color:currentcolor;font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(0,102,204)" rel="nofollow noreferrer" target="_blank">Cgroups</a><span style="font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(21,21,21)"> and </span><a shape="rect" href="https://lwn.net/Articles/528078/" style="text-decoration-line:none;text-decoration-style:solid;text-decoration-color:currentcolor;font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(0,102,204)" rel="nofollow noreferrer" target="_blank">namespaces</a><span style="font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(21,21,21)">, to segregate processes so they can run independently. This independence is the intention of containers‐the ability to run multiple processes and apps separately from one another to make better use of your infrastructure while </span><a shape="rect" href="https://www.redhat.com/en/topics/security" style="text-decoration-line:none;text-decoration-style:solid;text-decoration-color:currentcolor;font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(0,102,204)" rel="nofollow noreferrer" target="_blank">retaining the security</a><span style="font-family:RedHatText,Overpass,Overpass,Helvetica,Arial,sans-serif;color:rgb(21,21,21)">you would have with separate systems.</span><br clear="none"></div></div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">So in simple terms, docker simply separates processes.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">There ARE, nonetheless, some problems with dockerizing everything. I have read issues like If the network traffic is way way way too high, you may encounter issues like dropped packets, etc. but this is a problem on the networking side, I.e: the iptables rules. Also the natting related to using docker can be cumbersome, but once you’re over that, it’s home free. </div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">So, as long as you manage your infrastructure well, you shouldn’t have problems.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">In terms of troubleshooting a failing container. All logging should be sent to some log server, and you can do your troubleshooting there. Also, don’t kill a failing container so you can access it (via ssh or attach or exec) and troubleshoot it.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">The pros of using docker/k8s greatly outweighs the cons, in my opinion.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">Hope this help.</div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">David</div><br clear="none"><div style="font-family:Helvetica,Arial,sans-serif"><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">On Sat, 2 May 2020 at 11:33, H Yavari via Users <<a shape="rect" href="mailto:users@lists.opensips.org" style="font-family:Helvetica,Arial,sans-serif" rel="nofollow noreferrer" target="_blank">users@lists.opensips.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"></div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Thank you Johan,</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">When your infrastructure goes to run with k8s or other same platforms, it's hard to make some exceptions.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Also softwares like opensips that are working just with DB, can run very smoothly. <br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Although I haven't seen any problem yet after moving it to containers, but I am interested in hearing from others and developers team.</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Regards,</div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">HY<br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div><div style="font-family:Helvetica,Arial,sans-serif">--------<br clear="none"></div>
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On Saturday, May 2, 2020, 12:51:51 PM GMT+4:30, johan <<a shape="rect" href="mailto:johan@democon.be" style="font-family:Helvetica,Arial,sans-serif" rel="nofollow noreferrer" target="_blank">johan@democon.be</a>> wrote:
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<div style="font-family:Helvetica,Arial,sans-serif"><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616m_3211529236503319823ydpa5d46026yiv4517330760" style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">
<p style="font-family:Helvetica,Arial,sans-serif">First of all, I am not aware of a production kubernetes cluster.
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<p style="font-family:Helvetica,Arial,sans-serif">Using containers has advantages : fast install, easy to move.
The annoying thing is that if it goes wrong, it is not easy to
troubleshoot. Secondly, you add an extra abstraction layer,
abstraction (most of the time) reduces speed and decreases
capacity. <br clear="none">
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<p style="font-family:Helvetica,Arial,sans-serif">In short : it all depends on the size of your system. In ip4 I
don't see the advantage. What could be a nice scalable system, is
to deploy on ip6 with anycast. <br clear="none">
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<p style="font-family:Helvetica,Arial,sans-serif">Just my thoughts ... <br clear="none">
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<div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616m_3211529236503319823ydpa5d46026yiv4517330760yqt12388" style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">On 2/05/2020 07:49, H Yavari via Users
wrote:<br clear="none">
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</blockquote></div></div><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616m_3211529236503319823ydpa5d46026yiv4517330760yqt28477" style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">
<div style="font-family:Helvetica,Arial,sans-serif">Hi to all,</div>
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<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">As you know docker and K8s,
are growing quickly. So we dockerized Asterisk and OpenSIPS
also.<br clear="none">
</div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">But I see some community
members are against it. They have some reasons like NAT, RTP
ports and performance.</div>
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</div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Do you agree with them ? <br clear="none">
</div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Is there any successful large
scale OpenSIPS cluster based on K8s ?</div>
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<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Thanks for sharing your
experiences.</div>
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<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">Regards,</div>
<div dir="ltr" style="font-family:Helvetica,Arial,sans-serif">HY<br clear="none">
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</div></blockquote></div></div><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616yqtfd94967" style="font-family:Helvetica,Arial,sans-serif">-- <br clear="none"></div><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><div dir="ltr" style="font-family:Helvetica,Arial,sans-serif"><div id="m_1204100867538621846ydpdcf8fc76yiv0752428268gmail-m_4702935700137486111m_-2457236702113300905ydpae5b371fyiv3017920011m_-2598378691510798310ydpb69ea7dayiv2354514616yqtfd34880" style="font-family:Helvetica,Arial,sans-serif"><div style="font-family:Helvetica,Arial,sans-serif">Regards,</div></div><div style="font-family:Helvetica,Arial,sans-serif"><br clear="none"></div>David Villasmil<div style="font-family:Helvetica,Arial,sans-serif">email: <a shape="rect" href="mailto:david.villasmil.work@gmail.com" style="font-family:Helvetica,Arial,sans-serif" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a></div><div style="font-family:Helvetica,Arial,sans-serif">phone: +34669448337</div></div></div></div></div></div>
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</div></div></blockquote></div></div></div>-- <br clear="none"><div dir="ltr"><div dir="ltr"><div>Regards,</div><div><br clear="none"></div>David Villasmil<div>email: <a shape="rect" href="mailto:david.villasmil.work@gmail.com" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a></div><div>phone: +34669448337</div></div></div></div></div></div>
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</div></div></blockquote></div></div>-- <br clear="none"><div dir="ltr"><div dir="ltr"><div>Regards,</div><div><br clear="none"></div>David Villasmil<div>email: <a shape="rect" href="mailto:david.villasmil.work@gmail.com" rel="nofollow noreferrer" target="_blank">david.villasmil.work@gmail.com</a></div><div>phone: +34669448337</div></div></div>
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