[Asterisk-Users] Fail over solutions

[Zoa]

Could you explain me some more how i could use dual controllers ? Is
this done with special harddisks ? What hardware do i need to do this ?


/Z.


trixter http://www.0xdecafbad.com wrote:

>One thing that could be done is to have a disk array for voicemail and
>all with dual controllers.  Then plug that into each of two servers.
>Bind the IP components to a IP that is transportable between machines.
>When one fails ifconfig the failover machine to use that IP (could be a
>virtual interface).
>
>Veritas HA works similiarly that way.  Via a serial cable there are
>'global atomic broadcasts' basically a ping.  If the ping fails to occur
>the machine marked backup assumes the IP for all services of the
>primary.  Because it has access to the same disks it can mount them and
>carry on like nothing happened.
>
>Veritas seperates services from the machine.  If you have say a web
>server, mail, and SIP you would have each one on a seperate IP so that
>if any one single service fails that one and only that one can be moved
>to the backup server.  With asterisk this may be overkill.
>
>MAC addresses are the only other problem.  Veritas accomplishes this by
>MAC spoofing.  Cisco PIX do as well.  You might, depending on specific
>ethernet driver, be able to  ifconfig eth0 headdr 00:00:de:ca:fb:ad.
>
>Just a thought.
>
>
>On Wed, 2005-04-27 at 08:33 +0100, Jason Williams wrote:
>
>
>>On 4/26/05, snacktime <snacktime at gmail.com> wrote:
>>
>>
>>>On 4/26/05, Sean Kennedy <skennedy at tpno-co.org> wrote:
>>>
>>>
>>>>Hi folks,
>>>>
>>>>I'm curious;  What does everyone do for failover?  I have two servers,
>>>>same os/compilation.  I designate one the master, the other the slave,
>>>>and I rsync the config files once an hour and trigger a restart when
>>>>convenient command on the console.  These two servers are setup in the
>>>>dns in a round robin fashion.
>>>>
>>>>What is everyone else doing?
>>>>
>>>>
>>>That's kind of a loaded question...  Do you plan on expanding?  What
>>>is your budget?  What are your uptime requirements?  Are you serving
>>>customers or is this just for internal use?
>>>
>>>
>>The biggest problem with that solution is voicemail it could get left
>>on one server and not be on the other for one hour.
>>
>>Jason
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