Simple validation script for Route 53 record-set JSON outputs

r53-export-validation.py

"""Simple validation script for Route 53 record-set JSON outputs

Only validates some record types

aws route53 list-resource-record-sets --hosted-zone-id zone-id-old > old-dns.json
aws route53 list-resource-record-sets --hosted-zone-id zone-id-new > new-dns.json
"""

from __future__ import annotations

import typing as t
import json
from dataclasses import dataclass


@dataclass
class Record:
    name: str
    type_: str
    ttl: str | None
    records: list[dict[str, str]]

    @classmethod
    def from_json(cls, data: dict[str, t.Any]) -> Record:
        if "AliasTarget" in data:
            raise NotImplementedError("no alias target")

        return cls(
            name=data["Name"],
            type_=data["Type"],
            ttl=data.get("TTL", None),
            records=data["ResourceRecords"],
        )

    @classmethod
    def from_record_sets_json(cls, path: str) -> list[Record]:
        with open(path) as fp:
            data = json.load(fp)

        records: list[Record] = []
        for record in data["ResourceRecordSets"]:
            try:
                records.append(cls.from_json(record))
            except NotImplementedError:
                continue

        return records


old = Record.from_record_sets_json("old-dns.json")
new = Record.from_record_sets_json("new-dns.json")

missing_in_old: list[Record] = []

for o in old:
    if o not in new:
        missing_in_old.append(o)

for x in missing_in_old:
    print(x)