openstack_configfile
/etc/neutron/plugins/ml2/linuxbridge_agent.ini
计算节点连接控制节点时，openstack-nova-compute.service(计算) 和 neutron-linuxbridge-agent.service(网络)需要连接控制节点的RabbitMQ 和keystone服务
/etc/nova/nova.conf
/etc/neutron/neutron.conf
/etc/neutron/plugins/ml2/linuxbridge_agent.ini
