<p dir="ltr">As cluster solution I use kazoo cluster with kamailio - after 6 mouth of usage I can say it perfect solution.</p>
<p dir="ltr">Also updates DNS record can be implemented via custom corosync resource agent script. Write this script is task of two or tree days. This solution is not require external servers.</p>
<br><div class="gmail_quote"><div dir="ltr">On Fri, Feb 12, 2016, 14:50 Stanislav Sinyagin <<a href="mailto:ssinyagin@gmail.com">ssinyagin@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>as Sergey has proposed, there could be a DNS service which monitors the availability of your VoIP servers and changes the DNS entries if a server goes down. The TTL for individual SRV records could be set to few seconds.<br><br></div>But that means again that all users are using the same server, so it's not really a distributed model as Emrah challenged in the original mail.<br><br></div>Probably this new project will help in building a distributed cluster, but it needs a detailed study: <a href="https://ipfs.io/" target="_blank">https://ipfs.io/</a><br><br><br><br><br><div><div><br></div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 12, 2016 at 10:09 AM, Andrew Cassidy <span dir="ltr"><<a href="mailto:andrew@cassidywebservices.co.uk" target="_blank">andrew@cassidywebservices.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">It's not instant, but I've used OVH failover IP's to do that sort of thing. Heartbeat over ipsec tunnel, use pacemaker with a custom script that does the OVH API call to move the IP address.<div><br></div><div>Sadly it's not that quick, takes about 2 minutes.</div></div><div class="gmail_extra"><div><div><br><div class="gmail_quote">On 12 February 2016 at 07:40, Stanislav Sinyagin <span dir="ltr"><<a href="mailto:ssinyagin@gmail.com" target="_blank">ssinyagin@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">there is an issue with anycast routing though: when you bring up a new<br>
server, some running sessions will be dropped, because their IP<br>
packets would be routed to a different host. So, it needs a careful<br>
design. Maybe place only the SIP proxy on an anycast address, and run<br>
the calls from unique local addresses.<br>
<br>
<br>
Multiple DNS SRV records with different priorities are also possible,<br>
but you can't direct the users to the nearest location within the same<br>
domain. Also a bunch of SIP clients needs to be tested and you need to<br>
answer the questions, like:<br>
<br>
-- what is the timeout if the primary server is unavailable?<br>
-- if the primary host goes down during the call, how soon can the<br>
client re-dial?<br>
-- what happens if the primary server comes up again?<br>
<div><div><br>
<br>
<br>
<br>
<br>
<br>
On Thu, Feb 11, 2016 at 8:00 PM, Stanislav Sinyagin <<a href="mailto:ssinyagin@gmail.com" target="_blank">ssinyagin@gmail.com</a>> wrote:<br>
> hi Emrah and all,<br>
><br>
> it's the first time I actually searched for it, but there are hosting<br>
> offers with anycast IP routing. It means, you have multiple servers in<br>
> various locations, and they share the same service IP address. The<br>
> clients connect to the nearest server, which is determined by standard<br>
> BGP routing. You are still limited to a single global hosting<br>
> provider, but you benefit from its redundant network and geographical<br>
> distribution.<br>
><br>
> In case of anycast addressing, incoming connections will be served<br>
> easily. But the outgoing connections are rather tricky: you will need<br>
> to bring the outbound call to the physical server where the user has<br>
> registered, and initiate the connection from its anycast address. So,<br>
> you can share and replicate the registration database, but you need to<br>
> send the outbound call to the server which accepted the registration.<br>
> I guess you should be able to retrieve this information from the<br>
> registration database. This needs to be looked in details.<br>
><br>
> Google for anycast server hosting, and there are at least 3 providers<br>
> offering virtual hosts, and OVH is offering physical hosts as well. I<br>
> guess there are more providers with similar offerings.<br>
><br>
><br>
> Without anycast, you would need to use redundant registrars sharing<br>
> the same service IP address -- for example, Digitalocean offers such<br>
> service within any single datacenter.<br>
><br>
> Having multiple registrars with different IP addresses is also<br>
> possible, but then you depend on the way how each particular SIP<br>
> client handles multiple IP addresses after resolving the domain name.<br>
> Some of them may get stuck to a single address, even if it's not<br>
> responding.<br>
><br>
><br>
> cheers,<br>
> stanislav<br>
><br>
> On Thu, Feb 11, 2016 at 5:53 PM, Emrah <<a href="mailto:lists@kavun.ch" target="_blank">lists@kavun.ch</a>> wrote:<br>
>> Hi list,<br>
>> I’m writing to gather your thoughts and suggestions on how to have a high availability FS setup on different networks.<br>
>><br>
>> I am trying to achieve the following:<br>
>> - Load balance FreeSWITCH instances on 2 or more servers, possibly in different countries.<br>
>> - Shared user directory and dialplan, but I’m not sure if shared registrations would make sense.<br>
>> - If a server goes down, the phone should register on the alternative servers. Obviously we can’t keep calls up.<br>
>><br>
>> I’m obviously not the first one out there doing this. I’m trying to learn from those who’ve come up with reliable solutions.<br>
>><br>
>> I’ve tried sharing a registration table among multiple FS instances. But it was a beginners mistake. Even with the right path to reach the client, only the invites sent from the server used by the phone would be processed.<br>
>> If my phone registers on server A, then server A shares the info with server B, server B knows how to contact the phone but it won’t be able to. Supposedly because of NAT issues.<br>
>><br>
>> I am aiming for fully independent FS instances that can back each other up and be used independently. I am guessing this would require some sort of SBC or external registrar server with a Kamailio or Repro.<br>
>><br>
>> Anyway just trying to spark the conversation around this subject and hopefully we can come up with a formula that can help many with their FS deployments. My provider’s network just went all down in IPv4 and HA behind the same provider proved to be useless.<br>
>><br>
>> Best,<br>
>> E<br>
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<b style="color:rgb(51,135,171);text-decoration:none;font-family:sans-serif"><a href="mailto:info@cassidywebservices.co.uk" style="color:rgb(51,135,171);text-decoration:none;font-family:sans-serif" target="_blank">F</a> </b>03300 100 961</div><div><b style="text-decoration:none;font-family:sans-serif"><a href="mailto:info@cassidywebservices.co.uk" style="color:rgb(51,135,171);text-decoration:none;font-family:sans-serif" target="_blank">E</a> </b><a href="mailto:andrew@cassidywebservices.co.uk" target="_blank">andrew@cassidywebservices.co.uk</a></div><div><b style="text-decoration:none;font-family:sans-serif"><a href="mailto:info@cassidywebservices.co.uk" style="color:rgb(51,135,171);text-decoration:none;font-family:sans-serif" target="_blank">W</a> </b><a href="http://www.cassidywebservices.co.uk" target="_blank">www.cassidywebservices.co.uk</a></div></div></div></div></div></div>
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