My thinking of Nova-network HA

There's simple map in my mind

Note: I forgot to draw a VIP for nova-network hosts public Virtual IP

Two network nodes for OPENSTACK.

The HA solution for nova-network , I focus on a direction of "Router HA".

I found VRRP & GLBP protocols.

But GLBP is private protocol of CISCO......

Three VRRP in nova-network ....

EX.

	Net-Node1	VIP	Net-Node2
NIC0	172.16.1.1	172.16.1.3	172.16.1.2	Public Net
NIC1	10.0.0.1	10.0.0.3	10.0.0.2	Instances Net
NIC2	192.168.1.1	192.168.1.3	192.168.1.2	Mgm Net

NIC1 VRRP for instance network

NIC2 VRRP for Mgm network

NIC0 VRRP for Public network

In normal situation , node1 handle instance traffic , and node2 handle Mgm network

A working flow of running a instance

[API]----->[RabbitMQ]------>[node2 query rabbitMQ]------>[scheduler]------>[compute node]------>[instance DHCP request from node1]------>[instance get metadata from node1 redirect to API server].

Question:

1. Could I set same hostname for two network-nodes? bcz nova check hostname for component's job.

Btw, I'm awaiting for new release of OPENSTACK NOVA. In Diablo release , Compute node will redirect 169.254.169.254 to API server , instead of from nova-network(instance's gateway). If instance can route from a real router will be better . But I think the problem is how to assign public ip for instance is another course. In my consideration, that will be very hard to handle floating_ip.

OR another choice is figure a better HA for nova-network. But it's a role as router in NOVA. That's a technical challenge . In my research , GLBP is a good protocol .