code: def validate(config):
      '''
      Validate the beacon configuration
      '''
      if not isinstance(config, list):
          return False, ('Configuration for haproxy beacon must '
                         'be a list.')
      else:
          _config = {}
          list(map(_config.update, config))
  
          if 'backends' not in _config:
              return False, ('Configuration for haproxy beacon '
                             'requires backends.')
          else:
              if not isinstance(_config['backends'], dict):
                  return False, ('Backends for haproxy beacon '
                                 'must be a dictionary.')
              else:
                  for backend in _config['backends']:
                      log.debug('_config %s', _config['backends'][backend])
                      if 'servers' not in _config['backends'][backend]:
                          return False, ('Backends for haproxy beacon '
                                         'require servers.')
                      else:
                          _servers = _config['backends'][backend]['servers']
                          if not isinstance(_servers, list):
                              return False, ('Servers for haproxy beacon '
                                             'must be a list.')
      return True, 'Valid beacon configurationf validate(config):
      '''
      Validate the beacon configuration
      '''
      if not isinstance(config, list):
          return False, ('Configuration for haproxy beacon must '
                         'be a list.')
      else:
          _config = {}
          list(map(_config.update, config))
  
          if 'backends' not in _config:
              return False, ('Configuration for haproxy beacon '
                             'requires backends.')
          else:
              if not isinstance(_config['backends'], dict):
                  return False, ('Backends for haproxy beacon '
                                 'must be a dictionary.')
              else:
                  for backend in _config['backends']:
                      log.debug('_config %s', _config['backends'][backend])
                      if 'servers' not in _config['backends'][backend]:
                          return False, ('Backends for haproxy beacon '
                                         'require servers.')
                      else:
                          _servers = _config['backends'][backend]['servers']
                          if not isinstance(_servers, list):
                              return False, ('Servers for haproxy beacon '
                                             'must be a list.')
      return True, 'Valid beacon configuration'
docs: Validate the beacon configuration