[Rdo-list] Demo system recommendations

[Kashyap Chamarthy]

On Wed, Jun 25, 2014 at 02:26:02PM -0400, Lars Kellogg-Stedman wrote:
> On Wed, Jun 25, 2014 at 02:01:06PM -0400, Rich Bowen wrote:
> > So, in retrospect, this was a case of poor planning, but I'd like to figure
> > out how to have it not happen again, preferably even if I have to do a demo
> > that is completely off-line.
> 
> Rich,
> 
> It sounds like maybe you had services configured to use an ip address
> that was attached to your external interface that -- predictably --
> changed when booting in a new environment.
> 
> I like to run OpenStack demos inside virtual machines in my laptop.

Yep, I'd second the above comment. I do find it quite convenient to have
an OpenStack setup in virtual machines. I can even upload them to a
remote test machine to reproduce bugs, etc.

> This makes the network configuration completely independent from my
> laptop's external interface.
> 
> I use a MASQUERADE rule on the host to give instances in this
> environment external access.  That is, rather than attaching a
> physical nic to br-ex, I just give br-ex an ip address and then set up
> a masquerade rule for anything FROM that address range to eth0;
> something like:
> 
>     iptables -t nat -A POSTROUTING -s 172.16.0.0/24 -o eth0 -j MASQUERADE

Thanks for this tip, so far I got by w/o adding this rule. 

-- 
/kashyap