export_bind_zone_file diverged from the AXFR path in four ways, each a
bug:
- It iterated nb_zone.records.all(), including inactive records, whereas
the AXFR handler filtered Record.objects.filter(zone=nb_zone,
active=True). Exported zone files could contain stale/withdrawn
records.
- It passed record.ttl straight to rdataset.add(), crashing with a
TypeError when the NetBox DNS Record had no TTL set. The AXFR path
used 'ttl = record.ttl or nb_zone.default_ttl'.
- It had no TXT quoting logic, so TXT values containing spaces or
semicolons were mis-tokenized by dns.rdata.from_text (a ';' was
treated as the start of a comment). The AXFR path quotes and chunks
TXT values for exactly this reason.
- It appended a fresh rdataset to the node for every record instead of
merging records that share a name and type, producing duplicate
rdatasets and malformed zone files.
Extract build_dns_zone(nb_zone) in utils.py containing the corrected,
AXFR-proven record-building logic (active filter, TTL fallback, TXT
quoting/chunking, rdataset merging via rdatasets_dict). Rewrite
export_bind_zone_file to build the zone through build_dns_zone and then
write it. Rewrite request_handler._get_zone_from_nb to look up the
NetBox DNS Zone and delegate to build_dns_zone, keeping only the
DoesNotExist/OperationalError handling that is specific to the query
path.
Both code paths now produce identical zone data.
Sven Luethi
627a3a5712