Perhaps look at the path setting and what you can do.
A list of glob-based paths that will be crawled and fetched. All patterns supported by Go Glob are also supported here. For example, to fetch all files from a predefined level of subdirectories, the following pattern can be used: /var/log/*/*.log. This fetches all .log files from the subfolders of /var/log
I understand that I can config this way. The question is how to figure out in Kibana later on which line belongs to which log file on filebeat host. That's the reason I assigned different IDs. I hoped it will help later on