Copy over designate-managed DNS zones over from one OpenStack cloud to another

dnssync.py is a utility to copy/sync designate managed DNS zones from one OpenStack Cloud to another.

Usage: dnssync.py --from-cloud=CLOUD1 --to-cloud=CLOUD2 [options] --all|ZONE1 [ZONE2 ...]
Options: --remove|-r remove records in target not found in source
--mail|-m MAIL override email address in SOA records
--quiet|-q don't output statistics
--verbose|-v progress output

dnssync.py looks at all records from ZONE1 (and ZONE2 if specified or all zones with --all) in CLOUD1 and analyzes all records. It then looks at the records in the same zone in CLOUD2, creating the zone if needed. All records are copied over. NS and SOA records are treated specially. For the NS records of the zone itself, it ignores them. (These records are created during zone creation and should point to the nameservers of the zone. The NS records however are remembered, as we'll need them later. The SOA record of the source cloud zone is also analyzed and used for zone creation in the target cloud. If the TTL or EMail there are different than a preexisting setting in the target cloud, the latter is overwritten. (The program also handles the quirk in OTC's SOA record formatting.) The SOA's mail setting may be overwritten by --mail MAIL.

NS records for further zones (subdomains) are analyzed -- if they point to a third party DNS, they are copied over. If they point to the DNS NS of either source or target cloud, they are ignored.

(c) Kurt Garloff [email protected], 2/2024
SPDX-License-Identifier: CC-BY-SA-4.0