How to set custom call back server URL?

Question:

Say, you have multiple aliases for your SDC gateway node in your DNS. And, only one of them have proper certificates configured. How to configure this custom alias so that when you run a pipeline in cluster mode, the map tasks are able to post back metrics data using this alias/hostname

Answer:

This is how the callback.server.url is set in the code,

callback.server.url = baseHttpURl + /public-rest/v1/cluster/callbackWithResponse

and baseHttpURl is configurable through sdc.base.http.url in the sdc.properties file. You need to set sdc.base.http.url to your desired value and restart SDC to make the change effective.