Open Stack

Monty,

The architectural changes to the installation guide for Liberty [1] support
booting VMs on both the public/external/provider and
private/project/self-service networks.

Also, we should consider including similar "hybrid" scenarios in the
networking guide [2] so deployers don't have to choose between these
architectures.

[1] https://review.openstack.org/#/c/221560/
[2] http://docs.openstack.org/networking-guide/deploy.html

Matt

On Tue, Sep 15, 2015 at 9:04 AM, Monty Taylor <mordred at inaugust.com> wrote:

> Hey all!
>
> If any of you have ever gotten drunk with me, you'll know I hate floating
> IPs more than I hate being stabbed in the face with a very angry fish.
>
> However, that doesn't really matter. What should matter is "what is the
> most sane thing we can do for our users"
>
> As you might have seen in the glance thread, I have a bunch of OpenStack
> public cloud accounts. Since I wrote that email this morning, I've added
> more - so we're up to 13.
>
> auro
> citycloud
> datacentred
> dreamhost
> elastx
> entercloudsuite
> hp
> ovh
> rackspace
> runabove
> ultimum
> unitedstack
> vexxhost
>
> Of those public clouds, 5 of them require you to use a floating IP to get
> an outbound address, the others directly attach you to the public network.
> Most of those 8 allow you to create a private network, to boot vms on the
> private network, and ALSO to create a router with a gateway and put
> floating IPs on your private ip'd machines if you choose.
>
> Which brings me to the suggestion I'd like to make.
>
> Instead of having our default in devstack and our default when we talk
> about things be "you boot a VM and you put a floating IP on it" - which
> solves one of the two usage models - how about:
>
> - Cloud has a shared: True, external:routable: True neutron network. I
> don't care what it's called  ext-net, public, whatever. the "shared" part
> is the key, that's the part that lets someone boot a vm on it directly.
>
> - Each person can then make a private network, router, gateway, etc. and
> get floating-ips from the same public network if they prefer that model.
>
> Are there any good reasons to not push to get all of the public networks
> marked as "shared"?
>
> OH - well, one thing - that's that once there are two networks in an
> account you have to specify which one. This is really painful in nova
> clent. Say, for instance, you have a public network called "public" and a
> private network called "private" ...
>
> You can't just say "nova boot --network=public" - nope, you need to say
> "nova boot --nics net-id=$uuid_of_my_public_network"
>
> So I'd suggest 2 more things;
>
> a) an update to python-novaclient to allow a named network to be passed to
> satisfy the "you have more than one network" - the nics argument is still
> useful for more complex things
>
> b) ability to say "vms in my cloud should default to being booted on the
> public network" or "vms in my cloud should default to being booted on a
> network owned by the user"
>
> Thoughts?
>
> Monty
>
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