[Freeswitch-users] High availability on different networks

[Vik Killa]

What about DNS SRV?

On Thu, Feb 11, 2016 at 2:00 PM, Stanislav Sinyagin <ssinyagin at gmail.com>
wrote:

> hi Emrah and all,
>
> it's the first time I actually searched for it, but there are hosting
> offers with anycast IP routing. It means, you have multiple servers in
> various locations, and they share the same service IP address. The
> clients connect to the nearest server, which is determined by standard
> BGP routing. You are still limited to a single global hosting
> provider, but you benefit from its redundant network and geographical
> distribution.
>
> In case of anycast addressing, incoming connections will be served
> easily. But the outgoing connections are rather tricky: you will need
> to bring the outbound call to the physical server where the user has
> registered, and initiate the connection from its anycast address. So,
> you can share and replicate the registration database, but you need to
> send the outbound call to the server which accepted the registration.
> I guess you should be able to retrieve this information from the
> registration database. This needs to be looked in details.
>
> Google for anycast server hosting, and there are at least 3 providers
> offering virtual hosts, and OVH is offering physical hosts as well. I
> guess there are more providers with similar offerings.
>
>
> Without anycast, you would need to use redundant registrars sharing
> the same service IP address -- for example, Digitalocean offers such
> service within any single datacenter.
>
> Having multiple registrars with different IP addresses is also
> possible, but then you depend on the way how each particular SIP
> client handles multiple IP addresses after resolving the domain name.
> Some of them may get stuck to a single address, even if it's not
> responding.
>
>
> cheers,
> stanislav
>
> On Thu, Feb 11, 2016 at 5:53 PM, Emrah <lists at kavun.ch> wrote:
> > Hi list,
> > I’m writing to gather your thoughts and suggestions on how to have a
> high availability FS setup on different networks.
> >
> > I am trying to achieve the following:
> >  - Load balance FreeSWITCH instances on 2 or more servers, possibly in
> different countries.
> > - Shared user directory and dialplan, but I’m not sure if shared
> registrations would make sense.
> > - If a server goes down, the phone should register on the alternative
> servers. Obviously we can’t keep calls up.
> >
> > 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.
> >
> > 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.
> > 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.
> >
> > 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.
> >
> > 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.
> >
> > Best,
> > E
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>
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