参考了网络上其它朋友的方法。
修改Neutron配置文件，使其支持Qos
修改Neutron.conf
service_plugins = neutron.services.qos.qos_plugin.QoSPlugin
修改plugins/ml2/ml2_conf.ini
[ml2] extension_drivers=qos [agent] extensions=qos
重启neutron服务
systemctl restart neutron-server.service neutron-linuxbridge-agent.service neutron-dhcp-agent.service neutron-metadata-agent.service
创建一个policy
neutron qos-policy-create test
openstack network qos policy create test
添加限速rule
neutron qos-bandwidth-limit-rule-createbw-limiter --max-kbps 700000 --max-burst-kbps 560000
openstack network qos rule create b67368e8-187b-4777-822c-1af3ed59a59e --max-kbps 20480 --max-burst-kbits 30720 --type bandwidth-limit
绑定Port
neutron port-update <port_id> --qos-policy test
openstack port set 32873801-a55c-4656-8147-0dd1b576d75a --qos-policy b67368e8-187b-4777-822c-1af3ed59a59e
绑定Network
neutron net-update <network_id> --qos-policy test