Hi @v.popov
Apologies I don't read Cyrllic (I think this is what I got from google translate)
So yes, you can create a custom filebeat index / template, etc... ... BUT here is what I would do ...
1st I would get filebeat working the way you want before you try to dockerize it. Just download the .tar.gz and get steps 2 & 3 working first then dockerize it
2nd I would just get filebeat working without changing the index name, ILM Policy etc... use all the defaults and see if you can load the data...
3rd then I would try to created your custome index, alias ILM alias etc..etc..
You that you are pretty far off on that (and it actually adds little value)
I will need to look up all the proper config for that... on such an old version.
Perhaps look at this thread.
I think this will show what you need to do
It looks like you are using 7.3 which is truly ancient version.
Also lets keep this in one Thread and not use the other one...
Putting ngnix in the middle I will not be able to help with that...
So lets break down the probablem in pieces...