fluent.conf

## match events whose tag is newrelic.**
<filter newrelic.**>
  @type record_transformer
  enable_ruby true
  auto_typecast true
  <record>
    hostname ${if record['host']; record['host']; elsif tag_parts[1]; "#{tag_parts[1]}.herokuapp.com"; else 'herokuapp.com'; end}
    service ${if record['ident'] && record['pid']; "#{record['ident']}[#{record['pid']}]"; else 'app[web.1]'; end}
    tag ${tag}
    source "heroku"
  </record>
</filter>
## match events whose tag is newrelic.** and send to New Relic
<match newrelic.**>
  @type newrelic
  api_key "#{ENV['NR_API_KEY']}"
  use_ssl true
  <buffer>
    @type file
    path ./buffer/newrelic
    flush_at_shutdown true
    flush_interval 10s
    flush_mode interval
    retry_forever true
  </buffer>
</match>

## match tag=debug.** and dump to console
<match debug.**>
  @type stdout
</match>