[Neutron] Tap as a service

Hello, Can anyone help me with the setup of Tap as a Service on Openstack with Juju and Maas? I've seen tutorials for installing it on DevStack but nothing for large scale setups. So far I've tried doing a similar process to this: https://zhuanlan.zhihu.com/p/101599786 basically install the apt on the neutron_api lxd and on the compute nodes, with configurations that are done in the above tutorial. Sounds simple enough. But the tap_services and tap_flows stay in Down state. Any ideas??? Also I'm open to another way to do port mirroring if this doesn't work. JB