High Availability of a web server on a distributed cloud

[Fernando Duran]

>________________________________
> From: Dave Cramer <davecramer at gmail.com>
>To: tlug-lxSQFCZeNF4 at public.gmane.org 
>Sent: Monday, January 14, 2013 2:58:55 PM
>Subject: Re: [TLUG]: High Availability of a web server on a distributed cloud
> 
>
>Well I don't want to use a single provider such as amazon. Which makes things more difficult.

More difficult how? if it's because you're more dependent of a particular provider/solution I understand. 


Cheers,

---------------------
Fernando Duran
http://www.fduran.com



>
>
>So the problem is essentially how to duplicate their elastic ip's
>
>
>
>Dave Cramer
>
>
>On Mon, Jan 14, 2013 at 2:51 PM, Fernando Duran <liberosec-FFYn/CNdgSA at public.gmane.org> wrote:
>
>If the application is HTTP a relatively simple solution is to use nginx as a load balancer http://blog.jsdelivr.com/2013/01/nginx-load-balancing-basics.html plus some hearbeat/monitoring to detect/alert when a node goes down.
>>
>>High availability is an excellent area to learn about networking/scripting/trade-off decisions etc but it's very hard to get right, esp. the first time. I think is very worth it using the cloud provider's solutions, like Amazon's (or Rackspace's) load balancers and autoscaling.
>>
>>---------------------
>>Fernando Duran
>>http://www.fduran.com
>>
>>
>>>________________________________
>>> From: Dave Cramer <davecramer at gmail.com>
>>>To: tlug-lxSQFCZeNF4 at public.gmane.org
>>>Sent: Monday, January 14, 2013 8:57:39 AM
>>>Subject: [TLUG]: High Availability of a web server on a distributed cloud
>>
>>>
>>>
>>>It is relatively simple to distribute an application to a number of servers and use haproxy to switch ip's. What I can't figure out is how to switch make sure that the IP that points to ha-proxy can be moved easily if that machine fails ?
>>>
>>>
>>>DNS round robin doesn't exactly work. I have a very limited understanding of BGP is it possible to do without BGP ?
>>>
>>>
>>>
>>>Dave Cramer
>>>
>>> 
>>
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