Daniel Allaire
97670dd27c
scripts/devis_reseau.py decouvre les instances federees (ip-miroir) et emet VLANs + SVIs + ACLs d'isolation inter-tenant, derives des nomenclatures. Plus jamais saisi a la main. Eprouve sur Chezlepro + Technolibre. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
119 lines
4.6 KiB
Python
119 lines
4.6 KiB
Python
#!/usr/bin/env python3
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"""Devis de configuration switch (VLANs + SVIs + ACLs) du réseau convergé.
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DÉRIVÉ des nomenclatures `ip-miroir` de toutes les instances fédérées (dossiers
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frères `../*/plan/nomenclature.yml` ayant `vmid_schema: ip-miroir` + un `index`).
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Rien n'est saisi à la main : le devis reste synchrone avec le plan.
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VLAN = 1000 + index×10 + zone (4 chiffres, unique globalement sur le trunk convergé).
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Sortie : config Cisco IOS-like (à adapter à la plateforme réelle : NX-OS/IOS-XE, HSRP, VRF).
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"""
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from __future__ import annotations
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import argparse
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import ipaddress
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import re
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import sys
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from pathlib import Path
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import yaml
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RACINE = Path(__file__).resolve().parent.parent
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DOSSIER_INSTANCES = RACINE.parent
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def masque(cidr: int) -> str:
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return str(ipaddress.IPv4Network(f"0.0.0.0/{cidr}").netmask)
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def reseau_wildcard(supernet: str) -> tuple[str, str]:
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reseau = ipaddress.IPv4Network(supernet, strict=False)
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return str(reseau.network_address), str(reseau.hostmask)
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def prefixe(nom_dossier: str) -> str:
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base = re.sub(r"^OPS-", "", nom_dossier)
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base = re.sub(r"-lab$", "", base)
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return (re.sub(r"[^A-Za-z0-9]", "", base).upper() or "T")[:4]
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def decouvrir() -> list[tuple[str, str, dict]]:
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tenants = []
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for chemin in sorted(DOSSIER_INSTANCES.glob("*/plan/nomenclature.yml")):
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n = yaml.safe_load(chemin.read_text(encoding="utf-8")) or {}
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if n.get("vmid_schema") == "ip-miroir" and n.get("index") is not None:
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nom = chemin.parent.parent.name
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tenants.append((nom, prefixe(nom), n))
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tenants.sort(key=lambda t: t[2]["index"])
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return tenants
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def vlan_de(index: int, zone: int) -> int:
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return 1000 + index * 10 + zone
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def generer(tenants: list[tuple[str, str, dict]]) -> str:
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out = ["configure terminal", "!"]
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out += [
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"! ============================================================",
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"! DEVIS SWITCH — reseau converge multi-tenant (Set-OPS)",
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"! Genere par scripts/devis_reseau.py depuis les nomenclatures.",
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"! VLAN = 1000 + index*10 + zone (unique globalement sur le trunk).",
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"! ============================================================",
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"!",
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"! ----- 1. VLANs -----",
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]
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for nom, pfx, n in tenants:
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out.append(f"! {nom} (index {n['index']})")
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for zone in sorted(n["categories"]):
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c = n["categories"][zone]
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out.append(f"vlan {vlan_de(n['index'], zone)}")
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out.append(f" name {pfx}-{c['libelle']}")
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out += ["!", "! ----- 2. Interfaces de routage (SVI = passerelle des hotes) -----"]
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for nom, pfx, n in tenants:
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m = masque(int(n.get("cidr_hote", 24)))
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for zone in sorted(n["categories"]):
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c = n["categories"][zone]
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out.append(f"interface Vlan{vlan_de(n['index'], zone)}")
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out.append(f" description {nom}-{c['libelle']}")
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out.append(f" ip address {c['passerelle']} {m}")
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out.append(f" ip access-group {pfx}-ISOLATION in")
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out.append(" no shutdown")
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out += ["!", "! ----- 3. ACL d'isolation tenant (default-deny inter-tenant) -----"]
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for nom, pfx, n in tenants:
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reseau, wild = reseau_wildcard(n["supernet"])
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out.append(f"ip access-list extended {pfx}-ISOLATION")
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out.append(f" remark Intra-tenant {nom} : routage local autorise")
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out.append(f" permit ip {reseau} {wild} {reseau} {wild}")
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for autre_nom, _, autre in tenants:
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if autre_nom == nom:
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continue
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a_reseau, a_wild = reseau_wildcard(autre["supernet"])
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out.append(f" remark Bloquer le tenant {autre_nom}")
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out.append(f" deny ip {reseau} {wild} {a_reseau} {a_wild}")
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out.append(" remark Reste (Internet / inter-tenant controle) -> passerelle OPNsense")
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out.append(f" permit ip {reseau} {wild} any")
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out += ["!", "! ----- 4. Trunk vers Proxmox + inter-switch (a adapter) -----"]
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vlans = ",".join(
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str(vlan_de(n["index"], zone))
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for _, _, n in tenants
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for zone in sorted(n["categories"])
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)
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out.append("interface <PORT-VERS-PROXMOX>")
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out.append(" switchport mode trunk")
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out.append(f" switchport trunk allowed vlan add {vlans}")
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out += ["!", "end", "write memory"]
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return "\n".join(out)
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def main() -> None:
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argparse.ArgumentParser(description=__doc__).parse_args()
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tenants = decouvrir()
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if not tenants:
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print("Aucune instance 'ip-miroir' federee trouvee (../*/plan/nomenclature.yml).",
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file=sys.stderr)
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sys.exit(1)
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print(generer(tenants))
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if __name__ == "__main__":
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main()
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