text: // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you under the Apache License, Version 2.0 (the
  // "License"); you may not use this file except in compliance
  // with the License.  You may obtain a copy of the License at
  //
  //   http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing,
  // software distributed under the License is distributed on an
  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  // KIND, either express or implied.  See the License for the
  // specific language governing permissions and limitations
  // under the License.
  
  #include <iostream>
  #include <string>
  
  #include <gflags/gflags_declare.h>
  #include <glog/logging.h>
  
  #include "kudu/gutil/strings/substitute.h"
  #include "kudu/master/master.h"
  #include "kudu/master/master_options.h"
  #include "kudu/util/flags.h"
  #include "kudu/util/init.h"
  #include "kudu/util/logging.h"
  #include "kudu/util/monotime.h"
  #include "kudu/util/status.h"
  #include "kudu/util/version_info.h"
  
  using kudu::master::Master;
  
  DECLARE_string(rpc_bind_addresses);
  DECLARE_int32(webserver_port);
  DECLARE_bool(evict_failed_followers);
  
  namespace kudu {
  namespace master {
  
  static int MasterMain(int argc, char** argv) {
    InitKuduOrDie();
  
    // Reset some default values before parsing gflags.
    FLAGS_rpc_bind_addresses = strings::Substitute("0.0.0.0:$0",
                                                   Master::kDefaultPort);
    FLAGS_webserver_port = Master::kDefaultWebPort;
  
    // A multi-node Master leader should not evict failed Master followers
    // because there is no-one to assign replacement servers in order to maintain
    // the desired replication factor. (It's not turtles all the way down!)
    FLAGS_evict_failed_followers = false;
  
    GFlagsMap default_flags = GetFlagsMap();
  
    ParseCommandLineFlags(&argc, &argv, true);
    if (argc != 1) {
      std::cerr << "usage: " << argv[0] << std::endl;
      return 1;
    }
    std::string nondefault_flags = GetNonDefaultFlags(default_flags);
    InitGoogleLoggingSafe(argv[0]);
  
    LOG(INFO) << "Master server non-default flags:\n"
              << nondefault_flags << '\n'
              << "Master server version:\n"
              << VersionInfo::GetAllVersionInfo();
  
    MasterOptions opts;
    Master server(opts);
    LOG(INFO) << "Initializing master server...";
    CHECK_OK(server.Init());
  
    LOG(INFO) << "Starting Master server...";
    CHECK_OK(server.Start());
  
    LOG(INFO) << "Master server successfully started.";
    while (true) {
      SleepFor(MonoDelta::FromSeconds(60));
    }
  
    return 0;
  }
  
  } // namespace master
  } // namespace kudu
  
  int main(int argc, char** argv) {
    return kudu::master::MasterMain(argc, argv);
  }
  