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use real event ip space

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This commit is contained in:
lilly 2025-03-18 17:50:44 +01:00
parent ed99a3710e
commit 712f0f4a17
Signed by: lilly
SSH key fingerprint: SHA256:y9T5GFw2A20WVklhetIxG1+kcg/Ce0shnQmbu1LQ37g
15 changed files with 222 additions and 167 deletions
packages/fetch-netbox-data
fetch-netbox-data.py

22
packages/fetch-netbox-data/fetch-netbox-data.py
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@ -5,36 +5,46 @@ from dns import rdatatype
from dns import rdataclass
from dns.rdtypes.ANY.SOA import SOA
from dns.rdtypes.ANY.NS import NS
from dns.rdtypes.ANY.CNAME import CNAME
from dns.rdtypes.IN.A import A
from dns.zone import Zone
from pathlib import Path
from pprint import pprint
def build_auth_dns_zones(nb: pynetbox.api, nox_dir: Path):
zones_dir = nox_dir / "data" / "zones"
zones_dir.mkdir(parents=True,exist_ok=True)
print(f"Fetching IPAM data to build authorative zonefiles in {zones_dir}")
print(f"Building zone noc.eh22.intern")
zonefile_path = zones_dir / "noc.eh22.intern.zone"
print(f"Building zone eh22.intern")
zonefile_path = zones_dir / "eh22.intern.zone"
# build zone management stuff (SOA record, NS record)
zone = Zone(origin="noc.eh22.intern")
zone = Zone(origin="eh22.intern")
zone.get_rdataset("@", rdtype=rdatatype.SOA, create=True)\
.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))
zone.get_rdataset("@", rdtype=rdatatype.NS, create=True)\
.add(NS(rdclass=rdataclass.IN, rdtype=rdatatype.NS, target="10.20.25.3"))
# iterate over all ip addresses with dns names ending in noc.eh22.intern
for i_addr in nb.ipam.ip_addresses.filter("noc.eh22.intern"):
for i_addr in nb.ipam.ip_addresses.filter("eh22.intern"):
raw_addr = i_addr.address.rsplit("/", maxsplit=1)[0]
relative_name = i_addr.dns_name.removesuffix(".noc.eh22.intern")
relative_name = i_addr.dns_name.removesuffix(".eh22.intern")
# add A/AAAA record for the name itself
if i_addr.family.value == 4:
zone.get_rdataset(relative_name, rdtype=rdatatype.A, create=True)\
.add(A(rdclass=rdataclass.IN, rdtype=rdatatype.A, address=raw_addr))
else:
raise RuntimeError(f"Got unknown IP family {i_addr.family} ({i_addr.family.value})")
# add CNAME records for all registered alternative names
if i_addr.custom_fields["altnames"]:
for i_altname in i_addr.custom_fields["altnames"].split(","):
i_altname = i_altname.strip().removesuffix(".eh22.intern")
zone.get_rdataset(i_altname, rdtype=rdatatype.CNAME, create=True)\
.add(CNAME(rdclass=rdataclass.IN, rdtype=rdatatype.CNAME, target=relative_name + ".eh22.intern."))
with open(zonefile_path, mode="w") as f:
zone.to_file(f, want_comments=True, want_origin=True)