$ docker run --rm gettyimages/chronos_exporter --help
Usage of marathon_exporter:
  -marathon.uri string
        URI of Marathon (default "http://marathon.mesos:8080")
  -web.listen-address string
        Address to listen on for web interface and telemetry. (default ":9044")
  -web.telemetry-path string
        Path under which to expose metrics. (default "/metrics")
  -log.format value
        If set use a syslog logger or JSON logging. Example: logger:syslog?appname=bob&local=7 or logger:stdout?json=true. Defaults to stderr.
  -log.level value
        Only log messages with the given severity or above. Valid levels: [debug, info, warn, error, fatal]. (default info)