code: def create_failover_dns(self, primary_region='us-east-1'):
          
          dns_record = self.generated.dns()['global']
          zone_ids = get_dns_zone_ids(env=self.env, facing=self.elb_subnet)
  
          elb_dns_aws = find_elb(name=self.app_name, env=self.env, region=self.region)
          elb_dns_zone_id = find_elb_dns_zone_id(name=self.app_name, env=self.env, region=self.region)
  
          if primary_region in elb_dns_aws:
              failover_state = 'PRIMARY'
          else:
              failover_state = 'SECONDARY'
          self.log.info("%s set as %s record", elb_dns_aws, failover_state)
  
          self.log.info('Updating Application Failover URL: %s', dns_record)
  
          dns_kwargs = {
              'dns_name': dns_record,
              'elb_dns_zone_id': elb_dns_zone_id,
              'elb_aws_dns': elb_dns_aws,
              'dns_ttl': self.dns_ttl,
              'failover_state': failover_state,
          }
  
          for zone_id in zone_ids:
              self.log.debug('zone_id: %s', zone_id)
              update_failover_dns_record(self.env, zone_id, **dns_kwargs)
  
          return dns_record
docs: Create dns entries in route53 for multiregion failover setups.
  
          Args:
              primary_region (str): primary AWS region for failover
          Returns:
              Auto-generated DNS name.