fluentd/label/default_output/elasticsearch.yml

classes:
- service.fluentd.agent.output.elasticsearch
- system.fluentd.label.default_output.filter.common
parameters:
  fluentd:
    agent:
      config:
        label:
          default_output:
            match:
              elasticsearch_output:
                host: ${_param:fluentd_elasticsearch_host}
                port: ${_param:fluentd_elasticsearch_port}
                scheme: ${_param:fluentd_elasticsearch_scheme}