Function main

src/launcher/executor.cpp:1366–1468

int main(int argc, char** argv)
{
  mesos::FrameworkID frameworkId;
  mesos::ExecutorID executorId;

  Flags flags;

  // Load flags from command line.
  Try<flags::Warnings> load = flags.load(None(), &argc, &argv);

  if (flags.help) {
    cout << flags.usage() << endl;
    return EXIT_SUCCESS;
  }

  if (load.isError()) {
    cerr << flags.usage(load.error()) << endl;
    return EXIT_FAILURE;
  }

  mesos::internal::logging::initialize(argv[0], true, flags); // Catch signals.

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

  Option<string> value = os::getenv("MESOS_FRAMEWORK_ID");
  if (value.isNone()) {
    EXIT(EXIT_FAILURE)
      << "Expecting 'MESOS_FRAMEWORK_ID' to be set in the environment";
  }
  frameworkId.set_value(value.get());

  value = os::getenv("MESOS_EXECUTOR_ID");
  if (value.isNone()) {
    EXIT(EXIT_FAILURE)
      << "Expecting 'MESOS_EXECUTOR_ID' to be set in the environment";
  }
  executorId.set_value(value.get());

  // Get executor shutdown grace period from the environment.
  //
  // NOTE: We avoided introducing a command executor flag for this
  // because the command executor exits if it sees an unknown flag.
  // This makes it difficult to add or remove command executor flags
  // that are unconditionally set by the agent.
  Duration shutdownGracePeriod = DEFAULT_EXECUTOR_SHUTDOWN_GRACE_PERIOD;
  value = os::getenv("MESOS_EXECUTOR_SHUTDOWN_GRACE_PERIOD");
  if (value.isSome()) {
    Try<Duration> parse = Duration::parse(value.get());
    if (parse.isError()) {
      EXIT(EXIT_FAILURE)
        << "Failed to parse value '" << value.get() << "'"
        << " of 'MESOS_EXECUTOR_SHUTDOWN_GRACE_PERIOD': " << parse.error();
    }

    shutdownGracePeriod = parse.get();