[Rdo-list] Simplest Icehouse Implementation Architecture

Eric Berg eberg at rubensteintech.com
Thu May 29 20:04:00 UTC 2014

Thanks as always, Lars.

By "development environment", I mean several things:

1) Developers work on these hosts.  We're a web shop, and one or more 
developers will spin up dev web servers on these hosts
2) Ideally, I'd also want to validate our production cloud environment 
so that when we deploy it in production, we have validated the 

For the time being, however, #2 is a nice-to-have and does not at all 
seem to fit in with the fairly aggressive goal of implementing a new RDO 
deployment in 1-3 days (way over that already as you might well imagine).

So, basically, I want to migrate from the current set of physical hosts 
on which developers now work to a cloud environment which will host no 
more than 25 VMs.

Since we have two fairly well-endowed hosts targeted for use as compute 
hosts, would it be realistic to use one as the controller, while still 
using it as a compute host?

On a related note, what happens if I lose the controller box in this 
two-compute-hosts-one-as-controller-host scenario?  I believe that I'm 
out of business until I can remedy that, and if I wanted to set up the 
two hosts as both compute hosts as well as putting some kind of HA in 
place so that control could pass from one to the other of these boxes, 
would that be possible?  Recommended?

Must the control host be separate in order to do (live) migrations?

Is it a requirement that the control host be separate if I want to 
deploy 2 compute hosts?

And, if I choose the two-host solution, how does the network host 
(through which my understanding is that all network access to the 
instances must pass) play into this?


On 5/29/14, 3:39 PM, Lars Kellogg-Stedman wrote:
> On Thu, May 29, 2014 at 03:31:09PM -0400, Eric Berg wrote:
>> So, are either of the following architectures sufficient for a development
>> environment?
> Depending on your definition of "development environment", a *single*
> host may be sufficient.  It really depends on how many instances you
> expect to support, of what size, and what sort of workloads you'll be
> hosting.
> Having a seperate "control" node makes for nice logical separation of
> roles, which I find helpful in diagnosing problems.
> Having more than one compute node lets you experiment with things like
> instance migration, etc, which may be useful if you eventually plan to
> move to a production configuration.

Eric Berg
Sr. Software Engineer
Rubenstein Technology Group
55 Broad Street, 14th Floor
New York, NY 10004-2501

(212) 518-6400
(212) 518-6467 fax
eberg at rubensteintech.com

More information about the dev mailing list