[asterisk-users] High Availability with Asterisk

Paul Belanger paul.belanger at polybeacon.com
Fri Mar 7 10:31:21 CST 2014

On Thu, Mar 6, 2014 at 3:33 PM, Markus <universe at truemetal.org> wrote:
> Hi Thorolf,
> Am 06.03.2014 16:21, schrieb Thorolf Godawa:
>> Using (para-)virtualization with Xen could be an other option, on
>> systems with low load this works reliable, but what happens on systems
>> with high load? Are there any issues known about problems with the
>> realtime, packet loss etc. because it runs in a VM?
> hmm, all my Asterisk'es run in (KVM) VMs, no issues there. But how is this
> related to high availability? I think it's not. :)
> I think the way to go for high availability (and scalability) is Kamailio!
> In a redundant setup, running on 2 separate physical machines (maybe in a
> VM, doesn't matter). Then you make them failsafe using whatever tool(s)
> available. Then you can set up 1, 2, 10 or 100 Asterisk "behind" Kamailio
> and any of them could fail (but 1 :-) ) and you will still be online.
> If you want to further develop the high availability thought, then you could
> use CephFS which will give you self-healing, 100% available storage over
> multiple physical storage servers. There you could store your Asterisk
> config files, or your MySQL database used by all the Asterisk servers, for
> CDRs, SIP registrations etc. It's kinda slow, but I think fast enough for
> Asterisk / MySQL. :)
> And, to scale and to make the Asterisk nodes redundant (redundancy is not
> really needed anymore, since Kamailio takes care of that, but basically then
> you get also VM/physical redundancy), you could look into OpenNebula which
> provides a nice auto-scaling feature already out of the box. If there's load
> on your Asterisk VMs, OpenNebula will detect this and spawn new Asterisk VMs
> (probably on different physical servers, otherwise it doesn't make that much
> sense performance-wise) which will automagically receive requests/calls from
> Kamailio. If the load goes down, the VM can be automagically stopped again
> to free resources for other VMs/applications. OpenNebula is less popular
> than OpenStack, which seems to be the first choice for Cloud-stuff today,
> but what I liked about OpenNebula is that it provides the auto-scaling
> feature already in the customer-facing web-frontend out-of-the-box, unlike
> OpenStack. So you could offer your customers a self-managed, redundant
> Asterisk cloud or something like that. :)
> In theory, this combination should give you a 100% redundant, auto-healing,
> auto-scaling VoIP setup. :)
+1 to this post.  A lot of good information here.

Paul Belanger | PolyBeacon, Inc.
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Github: https://github.com/pabelanger | Twitter: https://twitter.com/pabelanger

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