[Openstack] Adding an extra compute node

Brandon Adams brandon.adams at newwave-technologies.com
Thu Sep 26 14:17:38 UTC 2013

Thanks for responding so quickly. The instances should be attached to the
internal network interface, which I can find on the network/compute node.
It's under the namespace of the router for the project:
*ip netns exec qrouter-4cff1882-1962-4084-9b48-cb1bcd048a4e ifconfig *shows
two interfaces, one for the internal network and one for the external

The problem I think is that this router isn't reachable from my extra
compute node. When I create the router, its namespace does not appear on
the extra node.

And I am using dhcp, the quantum-dhcp-agent is installed on the
network/compute node.


On Thu, Sep 26, 2013 at 9:57 AM, Cristian Falcas <cristi.falcas at gmail.com>wrote:

> layer 3 is created only on the network node. On compute nodes you have
> layer 2 only (openvswitch)
> The gre tunnels should take care of everything magically :).
> Where are the instances attached (that should be tap$id and source
> qbr$id)? Do you use dhcp?
> On Thu, Sep 26, 2013 at 4:40 PM, Brandon Adams
> <brandon.adams at newwave-technologies.com> wrote:
> > Hi all,
> >
> > I'm trying to add a second compute node my dev cluster, I've already got
> one
> > controller node and one network/compute node running perfectly. I've
> > installed all of the necessary packages and everything seems to be
> running
> > smoothly. However, when I create a private network and subnet, they don't
> > seem to be applied to the extra node. That is, I can see the extra
> > interfaces when I run ovs-vsctl show on the network/compute node, but
> not on
> > the dedicated compute node. There are GRE tunnels which I assume connect
> the
> > two nodes across the management network, and instances boot up on the new
> > node. They just can't find the internal network and thus can't be
> reached at
> > all. I'm running Grizzly on Ubuntu, using Quantum OpenVSwitch with GRE
> > tunnels. I've already fixed an error regarding brcompatd running on both
> > nodes,  so I'm wondering what my next step is. Thanks.
> >
> > Brandon
> >
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