Several Topologies

Topology


1-3 is been tested 

1. Single Node , Network Combine with our corporate network

All nova-component in one host , and the instance network is same as corporate network.

Machine	NICs	Networks
1	1 or 2	1 or 2

2.Multi Compute nodes

Two major parts , one host include most of services with a nova-compute cluster

Machine	NICs	Networks
1 controller	2 or 3	1 to 3
many compute nodes	1 or 2	1 or 2

3.Multiple servers

• All traffic through nova-network host

Machine	NICs	Networks
Nova-network	2 or 3	2 or 3
Nova-API	1	1
Compute nodes	1	1 or 2

• Instance traffic through nova-network , but API service direct connect from corporate network

  Machine	NICs	Networks
  Nova-network	2 or 3	2 or 3
  Nova-API	2	1 or 2
  Compute nodes	1	1 or 2

4. Production

• Production topology from StackOPS

This Topology has a problem , once nova-network dead , All trafic will lost. But it's interesting , I guess instance will be fine while nova-network restart.

I want to figure out a method of instance's gateway....

If we add a way to use router instead of nova-network host as gateway, it will be better .
But instance can not get metadata from api-server which is another problem.