two questions about mesos module

[liang tang]

1. Cannot find mesos module entry where module will start to run? didn't
find in slave/main.cc or module/mananger.cc

2. Why process in mesos module exits, service cannot be run in Marathon?
In my option, module shouldn't have an influence on service running.

Which code will invoke code about container logger module in
https://github.com/apache/mesos/blob/master/src/slave/container_loggers/lib_logrotate.cpp#L309-L339



mesos::modules::Module<ContainerLogger>
org_apache_mesos_LogrotateContainerLogger(
    MESOS_MODULE_API_VERSION,
    MESOS_VERSION,
    "Apache Mesos",
    "modules@mesos.apache.org",
    "Logrotate Container Logger module.",
    nullptr,
    [](const Parameters& parameters) -> ContainerLogger* {
      // Convert `parameters` into a map.
      std::map<std::string, std::string> values;
      foreach (const Parameter& parameter, parameters.parameter()) {
        values[parameter.key()] = parameter.value();
      }

      // Load and validate flags from the map.
      mesos::internal::logger::Flags flags;
      Try<flags::Warnings> load = flags.load(values);

      if (load.isError()) {
        LOG(ERROR) << "Failed to parse parameters: " << load.error();
        return nullptr;
      }

      // Log any flag warnings.
      foreach (const flags::Warning& warning, load->warnings) {
        LOG(WARNING) << warning.message;
      }

      return new mesos::internal::logger::LogrotateContainerLogger(flags);
    });