Assign beat.hostname to another field

Elastic Stack Beats
1

Hi all,
Is there a way to assign to some field a value of the beat.hostname field? Not to rename beat.hostname, not to smthg else, only to assign its value to another field like:

- type: log
  enabled: true
  json.keys_under_root: true
  json.add_error_key: true
  fields_under_root: true
  close_removed: true
  fields:
    service: storm
    host: beat.hostname
  paths:
    - /u01/storm/stormlog/workers-artifacts/additional_logs/json*.log

but it does not work.
ELK version 6.2.1
Thanks

2

Could you please share your configuration formatted using </> so if you have config problems I can find them?

3

Of course, edited.

4

Do you have any ideas?

5

Unfortunately, it's not supported by the current fields implementation. fields does not support referencing other fields.