Open Stack

Hello Frank,

What you are trying to do is one of the best case scenarios that
OpenStack was designed for :)

There's no one simple definitive answer to why you are unable to achieve
your goal, since you could. I'd recommend you to either take a deeper
look in to configuring networking on openstack or if you need to save
some time just use one of the installable openstack deployments like
Mirantis Fuel, Rackspace Private Cloud, Piston Cloud or others
https://wiki.openstack.org/wiki/Get_OpenStack#Commercial_Distributions

Regards,

Marko

Marko SlugaCHS d.o.o.Address: Tehnoloski Park 18 | Ljubljana | SI 1000 | SloveniaTelephone: +386 1 475 95 28 | Mobile: +386 40 84 44 04 | Fax: +386 1 475 95 01email: marko.sluga at chs.si | www: http://www.chsitipo.si

To elektronsko sporocilo je namenjeno zgolj naslovniku(om) in lahko vsebuje zaupne informacije. V primeru da ste pomotoma prejeli to sporocilo oz. ni namenjena vam, ga nimate pravice uporabljati, kopirati ali preposiljati; v tem primeru prav tako ne odpirajte priponk in elektronsko sporocilo nemudoma izbrisite, ter o tem obvestite posiljatelja. Hvala!

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-----Original Message-----
From: Frank Wilson [mailto:fajwilson at gmail.com] 
Sent: Sunday, April 13, 2014 8:17 PM
To: community at lists.openstack.org
Subject: [openstack-community] Internal Software Testing Cloud using
sparehardware

Hi,

I have been trying to get networking working in a 'simple' internal
cloud for a couple of months now and I am beginning to give up.

This internal cloud would be used for software testing distributed
systems. There are no external users, no multi tenancy.

Basically I have 4 spare mounted machines, nothing special.

* Two that don't support hardware virtualisation. These would make good
controllers / LXC compute nodes.
* Two that do support hardware virtualisation. So I was planning to use
KVM here.
* One managed 1Gbps switch (although I've not made use of the managed
features yet)
* One unmanaged 100Mbs switch (I almost want to throw this way)
* Each machine has two network ports, one internal and one external.
* I don't have control over the gateway router in the external LAN that
the machines are connected to

Basically what I'd like to do is have a multi (compute) host cloud that
supports VMs with two interfaces, one public interface with a routable
ip (on the private LAN, but outside the cloud) and one private (only
routable within the cloud). The attractive thing about this setup is
from the point of the view of the software running in the cloud it
mimics the basic setup in public clouds. So if we needed to scale up we
could point our scripts to a different cloud and still take advantage of
low traffic costs on their 'internal' networks.

Its the networking that is the major problem for me. Not really knowing
what networking daemon was necessary, I started out with nova-network.
This almost worked but it was hard to support two guest networks. It
might have worked if it were possible to run two dhcp servers on one
bridge (a limitation of nova-network daemon caused the second dhcp
server to overwrite the config of the first!). Another way it might have
worked would have been if linux bridge let you connect a real port to
two bridges or bridges to one another, but it doesn't.

So then I tried neutron but the guides that I found were vague and had
surprising hardware requirements, like

* Need a managed switch (in addition to OVS!)
* Need an external router (disappointing given that nova network had a
software router on each compute node!)

These requirements seemed to be because of the extra security needed for
multi-tenancy that were not relevant to my use case. But after having
tried many different permutations of settings in neutron I can't see a
way forward.

Is what I am doing impossible?

Frank

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