[Openstack-operators] Help adding my first compute-only node to my cloud controller with vlan networking

Narayan Desai narayan.desai at gmail.com
Tue Aug 28 16:14:06 UTC 2012

On Tue, Aug 28, 2012 at 10:53 AM, Samuel Winchenbach <swinchen at gmail.com> wrote:

<reasonable explanation elided>

> Here are several questions for compute-only node:
> 1.  Is there any manual network configuration that must be done on
> either node (creating br1, vnet0, etc) in order to correctly add the
> compute-only node?

We don't have to do this. Is there any difference in ethernet device
naming between the nodes? We've found that openstack is somewhat
brittle if you have a mixture of interface names across nova-compute

> 2.  Can/should the vlan and public interface be the same device?

We've run both ways without any issue.

> 3.  Sould the routing_source_ip be set to the address of the
> compute-only node, or the cloud-controller ip's (management, private
> or public)?

I *think* this needs to be setup for the host that is running
nova-network only. I might be wrong though.

> 4. Seeing we are using vlan networking, do we need to setup up the
> VLAN in the switch?

Absolutely. You'll need good dot1q tagged connectivity between the
nova-network server and all nodes running nova-compute.

When debugging these issues, i've added an IP address to the bridged
interface on the nova-compute host to test connectivity to the n-net

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