fluent.conf

<system>
  workers 4
</system>

<source>
  @type  forward
  @id    input1
  @label @mainstream
  port  24224
</source>

# Used for docker health check
<source>
  @type http
  port 8888
  bind 0.0.0.0
</source>

# records sent for health checking won't be forwarded anywhere
<match health**>
  @type null
</match>

<label @mainstream>
  <match frontend**>
    @type kinesis_firehose
    @id   output_kinesis_frontend
    region us-west-2
    delivery_stream_name elasticsearch-delivery-stream
    <buffer>
        flush_interval 1
        chunk_limit_size 1m
        flush_thread_interval 0.1
        flush_thread_burst_interval 0.01
        flush_thread_count 15
        total_limit_size 2GB
    </buffer>
  </match>
  <match backend**>
    @type kinesis_firehose
    @id   output_kinesis_backend
    region us-west-2
    delivery_stream_name s3-delivery-stream
    <buffer>
        flush_interval 1
        chunk_limit_size 1m
        flush_thread_interval 0.1
        flush_thread_burst_interval 0.01
        flush_thread_count 15
        total_limit_size 2GB
    </buffer>
  </match>
</label>