- Issues with rabbit ?
   - flap when rolling out agent / deploying new agent version
       - even crash on big regions
   - network flap / rabbit partition
       - pause-minority 

- Troubleshoot
    - oslo.metrics
    - 

- Journey to get stable
    - Infra POV
        - split rabbit-neutron / rabbit-*
        - scale some clusters to 5 node
        - Upgrade to 3.10+
    - 

- Deep dive
    - oslo.messaging
        - how RPC is implemented 
            - rpc server
        - call / cast
        - topic, fanout, notifications
    - neutron ovs rpc implementation
        - too many queues
        - too many connections