code: def atlas_node_init(my_hostname, my_portnum, atlasdb_path, zonefile_dir, working_dir):
      
      atlas_state = {}
      atlas_state['peer_crawler'] = AtlasPeerCrawler(my_hostname, my_portnum, atlasdb_path, working_dir)
      atlas_state['health_checker'] = AtlasHealthChecker(my_hostname, my_portnum, atlasdb_path)
      atlas_state['zonefile_crawler'] = AtlasZonefileCrawler(my_hostname, my_portnum, atlasdb_path, zonefile_dir)
      # atlas_state['zonefile_pusher'] = AtlasZonefilePusher(my_hostname, my_portnum, atlasdb_path, zonefile_dir)
  
      return atlas_state
docs: Start up the atlas node.
      Return a bundle of atlas state