@perfecto25 This is due to port 27017 being the IANA-registered port for MongoDB. go.d.plugin has a service discovery component:
- it finds that there is a service listens on 27107.
- it doesn’t check anything else because that is a well-known port.
- it creates a MongoDB data collection job.
Service discovery identification logic is go.d/sd/net_listeners.conf. If you want to change it - change or to and in this line.