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From William Oberman <ober...@civicscience.com>
Subject Re: VPC AWS
Date Thu, 05 Jun 2014 13:26:10 GMT
I was making assumptions (sorry!), namely the goal to switching to vpc
was getting "backend resources" (like cassandra) off the public internet.

Will

On Thursday, June 5, 2014, Alain RODRIGUEZ <arodrime@gmail.com> wrote:

> I think you can define VPC subnet to be public (to have public + private
> IPs) or private only.
>
> Any insight regarding snitches ? What snitch do you guys use ?
>
>
> 2014-06-05 15:06 GMT+02:00 William Oberman <oberman@civicscience.com
> <javascript:_e(%7B%7D,'cvml','oberman@civicscience.com');>>:
>
>> I don't think traffic will flow between "classic" ec2 and vpc directly.
>> There is some kind of gateway bridge instance that sits between, acting as
>> a NAT.   I would think that would cause new challenges for:
>> -transitions
>> -clients
>>
>> Sorry this response isn't heavy on content!  I'm curious how this thread
>> goes...
>>
>> Will
>>
>> On Thursday, June 5, 2014, Alain RODRIGUEZ <arodrime@gmail.com
>> <javascript:_e(%7B%7D,'cvml','arodrime@gmail.com');>> wrote:
>>
>>> Hi guys,
>>>
>>> We are going to move from a cluster made of simple Amazon EC2 servers to
>>> a VPC cluster. We are using Cassandra 1.2.11 and I have some questions
>>> regarding this switch and the Cassandra configuration inside a VPC.
>>>
>>> Actually I found no documentation on this topic, but I am quite sure
>>> that some people are already using VPC. If you can point me to any
>>> documentation regarding VPC / Cassandra, it would be very nice of you. We
>>> have only one DC for now, but we need to remain multi DC compatible, since
>>> we will add DC very soon.
>>>
>>> Else, I would like to know if I should keep using EC2MultiRegionSnitch
>>> or change the snitch to anything else.
>>>
>>> What about broadcast/listen ip, seeds...?
>>>
>>> We currently use public ip as for broadcast address and for seeds. We
>>> use private ones for listen address. Machines inside the VPC will only have
>>> private IP AFAIK. Should I keep using a broadcast address ?
>>>
>>>  Is there any other incidence when switching to a VPC ?
>>>
>>> Sorry if the topic was already discussed, I was unable to find any
>>> useful information...
>>>
>>
>>
>> --
>> Will Oberman
>> Civic Science, Inc.
>> 6101 Penn Avenue, Fifth Floor
>> Pittsburgh, PA 15206
>> (M) 412-480-7835
>> (E) oberman@civicscience.com
>> <javascript:_e(%7B%7D,'cvml','oberman@civicscience.com');>
>>
>
>

-- 
Will Oberman
Civic Science, Inc.
6101 Penn Avenue, Fifth Floor
Pittsburgh, PA 15206
(M) 412-480-7835
(E) oberman@civicscience.com

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