dns.py 文件源码

def delete_existing_cname(env, zone_id, dns_name):
    """Delete an existing CNAME record.

    This is used when updating to multi-region for deleting old records. The
    record can not just be upserted since it changes types.

    Args:
        env (str): Deployment environment.
        zone_id (str): Route53 zone id.
        dns_name (str): FQDN of application's dns entry to add/update.
    """
    client = boto3.Session(profile_name=env).client('route53')
    startrecord = None
    newrecord_name = dns_name
    startrecord = find_existing_record(env, zone_id, newrecord_name, check_key='Type', check_value='CNAME')
    if startrecord:
        LOG.info("Deleting old record: %s", newrecord_name)
        _response = client.change_resource_record_sets(
            HostedZoneId=zone_id, ChangeBatch={'Changes': [{
                'Action': 'DELETE',
                'ResourceRecordSet': startrecord
            }]})
        LOG.debug('Response from deleting %s: %s', dns_name, _response)