python script to update external-dns owner value

external-dns-python

import re
import boto3

client = boto3.client('route53')

def update_txt_record(HostzoneID, Name, value):
    try:
        response = client.change_resource_record_sets(
        HostedZoneId=HostzoneID,
        ChangeBatch= {
                        'Comment': 'add %s -> %s' % (Name, value),
                        'Changes': [
                            {
                             'Action': 'UPSERT',
                             'ResourceRecordSet': {
                                 'Name': Name,
                                 'Type': 'TXT',
                                 'TTL': 300,
                                 'ResourceRecords': [{'Value': value}]
                            }
                        }]
        })
    except Exception as e:
        print(e)

def main():
    response = client.list_hosted_zones()
    for x in response['HostedZones']:
        hostzoneID = [x.strip() for x in x['Id'].split('/hostedzone/')]
        recordSets = client.list_resource_record_sets(HostedZoneId=hostzoneID[1])

        for i in recordSets['ResourceRecordSets']:
            if i['Type'] == 'TXT' and i['ResourceRecords'][0]['Value']:
                match = re.search("owner=default", i['ResourceRecords'][0]['Value'])
                if match: 
                    print('Entry {} from hostzone {} has owner=default'.format(i['Name'], hostzoneID[1]))
                    newValue = re.sub('owner=default', 'owner=live-1', i['ResourceRecords'][0]['Value'])
                    update_txt_record(hostzoneID[1], i['Name'], newValue)
        
        print("Done hostzone {}".format(hostzoneID[1]))
        
if __name__ == "__main__":
    main()