[Openstack-operators] VM with a public IP

Matt Joyce matt.joyce at cloudscaling.com
Tue Aug 14 03:44:39 UTC 2012

I'd like to add i am not at all familiar with the quantum stack atm.  You
may want to tag this thread with quantum and ask again.  OpenStack is
slated to integrate quantum in folsom and a workable solution may exist
there.  I do think my last suggestion has some merit and i hope you give it
an honest assessment.

On Aug 13, 2012 8:15 PM, "Narayan Desai" <narayan.desai at gmail.com> wrote:

> On Mon, Aug 13, 2012 at 9:16 PM, Paul Walton <paul.d.walton at gmail.com>
> wrote:
> > I can certainly see the advantage to the current approach when you own
> the
> > network, but there are so many cases where you simply can't modify the
> > existing infrastructure.  In my case, there is simply no reason for me to
> > manage the network.  Up until now, all I have needed was for my VM to
> make a
> > DHCP request, and get a public IP.  However, I really like the idea of
> > OpenStack, and my boss is convinced that we need to be using it.  So,
> unless
> > OpenStack has the ability to do this, then I'm left with having my boss
> > petition the network admins to give us a subnet to use.  Which may take a
> > fair amount of time.
> >
> > I don't like the idea of hacking a solution together, so I guess the real
> > question is, can OpenStack currently do this or not?
> I think that the answer is no, OpenStack can't make use of externally
> controlled (via DHCP) addresses. There isn't a way that I can think of
> that you can make the APIs function properly in that mode.
> That said, you don't need a complete network allocation in order to
> use it either. As long as you have a set of statically assigned
> addresses, you can configure OpenStack to use them. Even if the
> network admins will only give you a few addresses, that will work
> properly. The major issue is the fact that dhcp can change your
> address while an instance has an address allocated to it, so if that
> can't happen, you should be ok.
>  -nld
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