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Is it possible to have compute nodes send traffic through their public interface in a flat network?

asked 2013-09-25 01:47:58 -0600

Kupo gravatar image

Hey all, is it possible in a flat networking setup to have compute nodes send traffic directly out to the public interface (not going through a controller node) as defined here? https://wiki.openstack.org/wiki/UnderstandingFlatNetworking

Trying to avoid a bottleneck at the controller.

Thanks for your help!

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are you using quantum or nova-network?

darragh-oreilly gravatar imagedarragh-oreilly ( 2013-09-25 02:28:52 -0600 )edit

From the ubuntu quickstart guide i installed quantum, however I'm welcome to try others if needed; whatever works!

Kupo gravatar imageKupo ( 2013-09-25 02:45:35 -0600 )edit

The wiki link in your question is specifc to nova-network. You will need to clarify what you mean by a compute-node's public interface.

darragh-oreilly gravatar imagedarragh-oreilly ( 2013-09-25 08:46:28 -0600 )edit

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answered 2013-09-25 02:24:09 -0600

updated 2013-09-25 02:34:52 -0600

It is possible to avoid a bottleneck of the controller node by using multi host networking and deploying nova-network service on each compute node. That means each compute node will act like a gateway to their VMs. More information about high availability options here: http://docs.openstack.org/grizzly/openstack-compute/admin/content/existing-ha-networking-options.html

This doesn't mean that your VMs will communicate through public interface as they will use same bridge for communication with other VMs in cluster. The only difference is avoiding SPOF on controller node.

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I'm trying to avoid DHCP, is it required for this model?

Kupo gravatar imageKupo ( 2013-09-25 02:42:27 -0600 )edit

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Asked: 2013-09-25 01:47:58 -0600

Seen: 224 times

Last updated: Sep 25 '13