Open Stack

On 1/9/2014 4:11 AM, Georgios Dimitrakakis wrote:
> Hello again!
>
> No the br100 was not created automatically unfortunately! There is also
> this bug report: https://bugs.launchpad.net/openstack-manuals/+bug/1241331

I'm not 100% sure but I think in my case it did get created 
automatically when I tried to fire up the cirros instance the 2nd time 
around... However, I may have created the bridge manually at some point 
while fighting with it, I forget.

https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/5/html/Virtualization/sect-Virtualization-Network_Configuration-Bridged_networking_with_libvirt.html

(from "disable network manager" down to "restart networking or reboot")

Also check that vhost_net module is loaded (lsmod).

> Since it wasn't created automatically I am asking if it has to be on
> both nodes (controller + compute) in order for the network to work
> correctly? Furthermore, I would like to know how should it be bridged in
> order to achieve floating (public) IPs?

Compute only: this is the interface VMs use to talk to the world. 
Floating IPs are a separate story really -- but if I uderstand the 
question correctly, your br100 should be bridged to the subnet where 
your floating IPs are.

I.e. if your eth0 is on 1.2.3.0/24 and your eth1 is on 10.0.0.0/24, and 
you want floating IPs in 1.2.3.0/24 range, then you want to bridge br100 
to eth0.

Dima