Creating VM directly on external network.

Thomas Goirand zigo at
Tue May 24 13:03:31 UTC 2022

On 5/24/22 12:50, Russell Stather wrote:
> Hi
> I have a charm based OpenStack setup.  The network topology is as below.
> Creating vms on the internal network and adding floating ips works as 
> expected.
> Adding vms on directly on to the ext_net does not. openstack allows me 
> to do it, but I get host is unreachable when trying to connect.
> Is there some configuration I have missed?
> Thanks

I believe what you're trying to do is an internal shared publicly 
reachable network (with public IPs). This can be done with OpenStack, 
with DHCP and all.

The only annoyance with this kind of setup, is that it can't be mixed 
with a private network with floating IPs, because your VMs would end up 
with 2 default gateways.

I hope this helps,

Thomas Goirand (zigo)

More information about the openstack-discuss mailing list