<store>
  @type               s3
  aws_key_id          "#{ENV['AWS_ACCESS_KEY_ID']}"
  aws_sec_key         "#{ENV['AWS_SECRET_ACCESS_KEY']}"
  s3_bucket           "#{ENV['S3_BUCKET']}"
  s3_region           "#{ENV['S3_REGION']}"
  path                "#{ENV['S3_PATH']}/#{ENV['HOSTNAME']}"
  <buffer>
    @type             memory
    # for more config options 
    # see https://docs.fluentd.org/configuration/buffer-section
    timekey           1h
    timekey_wait      5m
  </buffer>
</store>