65 lines
2.9 KiB
Python
Executable file
65 lines
2.9 KiB
Python
Executable file
#!/usr/bin/env python3
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import pynetbox
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import argparse
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from dns import rdatatype
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from dns import rdataclass
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from dns.rdtypes.ANY.SOA import SOA
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from dns.rdtypes.ANY.NS import NS
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from dns.rdtypes.ANY.CNAME import CNAME
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from dns.rdtypes.IN.A import A
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from dns.zone import Zone
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from pathlib import Path
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from pprint import pprint
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def build_auth_dns_zones(nb: pynetbox.api, nox_dir: Path):
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zones_dir = nox_dir / "data" / "zones"
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zones_dir.mkdir(parents=True,exist_ok=True)
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print(f"Fetching IPAM data to build authorative zonefiles in {zones_dir}")
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print(f"Building zone eh22.intern")
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zonefile_path = zones_dir / "eh22.intern.zone"
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# build zone management stuff (SOA record, NS record)
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zone = Zone(origin="eh22.intern")
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zone.get_rdataset("@", rdtype=rdatatype.SOA, create=True)\
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.add(SOA(rdclass=rdataclass.IN, rdtype=rdatatype.SOA, mname="auth-dns.noc.eh22.intern.", rname="noc.eh22.easterhegg.eu.", serial=1, refresh=7200, retry=3600, expire=3600000, minimum=60))
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zone.get_rdataset("@", rdtype=rdatatype.NS, create=True)\
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.add(NS(rdclass=rdataclass.IN, rdtype=rdatatype.NS, target="10.20.25.3"))
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# iterate over all ip addresses with dns names ending in noc.eh22.intern
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for i_addr in nb.ipam.ip_addresses.filter("eh22.intern"):
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raw_addr = i_addr.address.rsplit("/", maxsplit=1)[0]
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relative_name = i_addr.dns_name.removesuffix(".eh22.intern")
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# add A/AAAA record for the name itself
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if i_addr.family.value == 4:
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zone.get_rdataset(relative_name, rdtype=rdatatype.A, create=True)\
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.add(A(rdclass=rdataclass.IN, rdtype=rdatatype.A, address=raw_addr))
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else:
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raise RuntimeError(f"Got unknown IP family {i_addr.family} ({i_addr.family.value})")
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# add CNAME records for all registered alternative names
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if i_addr.custom_fields["altnames"]:
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for i_altname in i_addr.custom_fields["altnames"].split(","):
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i_altname = i_altname.strip().removesuffix(".eh22.intern")
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zone.get_rdataset(i_altname, rdtype=rdatatype.CNAME, create=True)\
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.add(CNAME(rdclass=rdataclass.IN, rdtype=rdatatype.CNAME, target=relative_name + ".eh22.intern."))
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with open(zonefile_path, mode="w") as f:
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zone.to_file(f, want_comments=True, want_origin=True)
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def main():
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argp = argparse.ArgumentParser(prog="fetch-netbox-data", description="Fetch current IPAM data from netbox")
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argp.add_argument("--base-url", default="https://netbox.eh22.easterhegg.eu", help="URL of the netbox installation")
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argp.add_argument("--token", required=True, help="Netbox API Token")
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argp.add_argument("--nox-dir", required=True, type=Path, help="Path to the nox repository")
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args = argp.parse_args()
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nb = pynetbox.api(args.base_url, token=args.token)
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build_auth_dns_zones(nb, args.nox_dir)
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if __name__ == "__main__":
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main()
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