Custom Elasticsearch ILM policy definition

[cimplart]

Hello,

currently a custom ILM policy must be created using the Elasticsearch REST API call after started. It is rather difficult to implement in a docker-compose application.
It would make the devops's life much easier if the default-ilm-policy.json could be replaced by some configuration option.
This is the relevant code snippet from the elasticsearch plugin:

def policy_payload
  policy_path = ::File.expand_path(ILM_POLICY_PATH, ::File.dirname(__FILE__))
  LogStash::Json.load(::IO.read(policy_path))
end

The new feature would allow to set policy_path from a new elasticsearch output option, in a similar way as the ILM template may be set with the template option.

[jacksparrow414]

Any progress on this issue?