Yet another personal KB
By default, ser2net uses the tcp accepter. This means that your input will be echo’d back to your terminal. For most use cases, that sucks. Modify it to the telnet accepter, and the issue is gone. For example, use: connection: READ MORE
So, I found out the hard way that track_instance_changes = false in nova.conf does not work. In /usr/lib/python3/dist-packages/oslo_service/periodic_task.py, add if task_name == “_sync_scheduler_instance_info”: return idle_for in the function run_periodic_tasks(), and get shit over with.