On 18/06/2013, at 1:46 PM, Jon Eisenstein <j...@animoto.com> wrote:

> 
> On Jun 17, 2013, at 11:31 PM, Andrew Beekhof <and...@beekhof.net> wrote:
> 
>> 
>> On 18/06/2013, at 7:19 AM, Jon Eisenstein <j...@animoto.com> wrote:
>> 
>>> tl;dr summary: On EC2, we can't reuse IP addresses, and we need a reliable, 
>>> scriptable procedure for replacing a dead (guaranteed no longer running) 
>>> server with another one without needing to take the remaining cluster 
>>> members down.
>> 
>> This is almost certainly the wrong approach.
>> Have you tried their Virtual Private Network feature?  This allows for the 
>> use of predictable IPs.
> 
> We've previously decided against it due to the performance impact of IPSec 
> and the complications involved in managing the network routing against the 
> rest of our stack. It's something that we're investigating more, but the 
> timeline's a bit longer than our HA need here.

Ok.

First question - what version of corosync? 1 or 2?  Is cman in use?  Which 
distro?
I think 2 is the most likely to be made workable here.

> If VPC becomes the only viable option, we may unfortunately have to abandon 
> the cluster approach altogether for now, which I'm trying to avoid.
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