metadata/service/agent/output/elasticsearch.yml

classes:
- service.fluentd.agent.single
parameters:
  fluentd:
    agent:
      config:
        label:
          default_output:
            filter:
              add_general_fields:
                tag: "**"
                type: record_transformer
                enable_ruby: true
                record:
                  - name: Type
                    value: log
                  - name: environment_label
                    value: ${_param:cluster_domain}
                  - name: Hostname
                    value: ${fluentd:dollar}{ hostname }
                  - name: Timestamp
                    value: ${fluentd:dollar}{ time.strftime('%Y-%m-%dT%H:%M:%S.%N%z') }
            match:
              elasticsearch_output:
                tag: "**"
                type: elasticsearch
                host: 127.0.0.1
                port: 9200