How to log debug information into 3rd party log system

I have a grid setup by selenium hub and appium, right now, it is hard to know the root cause of case failure because I have to log into each appium node to check log.
Is appium has machinsim log debugging information into some central place (like through logstash).
I found -log parameter from tutorial to log it into local file, however, that is not what I want.
There is another configuration ‘-webhook’, but I found this page
It says ‘-webhook’ has bug but it will not be fixed.

Is there any way I could log debugging information into logstash?