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Re: Getting DevStack networking working


If you are running on recent Ubuntu it appears that you basically need MULTI_HOST=True set for guest routing to work. Otherwise vhost_net corrupts the checksums of the dhcp packets, and you're kind of done.

Been trying to narrow this down as far as possible the last couple of days (as I have some environments where this works, and some where it doesn't), but I still don't have a specific narrow work around for it other than turning on MULTI_HOST.


On 06/04/2013 01:52 PM, Christopher Armstrong wrote:
Hi all!

I've been struggling the past couple of days on getting a working
DevStack so I can start contributing to the Heat project. The problems
I've been running into are largely networking related. I've tried a
number of combinations, like using latest git checkouts vs
stable/grizzly for the various projects, and nova-network vs quantum.

The two common behaviors I'm seeing are

1. if I use nova-network, I can't route to the guest VMs at all, with
private or public IP
2. if I use quantum, I can route into the guest VMs, and they can route
to each other, but I can't route out to the Internet (via tthe host

#2 is really close to working, and I wonder if it's just the thing to be
expected. If that's the case, what should I be doing to get the VMs to
be able to route to the outside world? For what it's worth, I followed
the instructions at https://wiki.openstack.org/wiki/QuantumDevstack to
get quantum-on-devstack working. I'm using the single-node setup.

I hope to start contributing a lot to the OpenStack project soon!

IRC: radix
Christopher Armstrong

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Sean Dague

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