TerraHome/nixos/kubeadm/scripts/render-inventory-from-tf-output.py

#!/usr/bin/env python3

import json
import os
import re
import sys


def natural_key(name: str):
    m = re.match(r"^([a-zA-Z-]+)-(\d+)$", name)
    if m:
        return (m.group(1), int(m.group(2)))
    return (name, 0)


def map_to_pairs(items: dict[str, str]) -> str:
    ordered = sorted(items.items(), key=lambda kv: natural_key(kv[0]))
    return " ".join(f"{k}={v}" for k, v in ordered)


def require_non_empty_ips(label: str, items: dict[str, str]) -> dict[str, str]:
    cleaned: dict[str, str] = {}
    missing: list[str] = []

    for name, ip in items.items():
        ip_value = (ip or "").strip()
        if not ip_value:
            missing.append(name)
            continue
        cleaned[name] = ip_value

    if missing:
        names = ", ".join(sorted(missing, key=natural_key))
        raise SystemExit(
            f"Missing IPv4 addresses for {label}: {names}. "
            "Terraform outputs are present but empty. "
            "This usually means Proxmox guest IP discovery is unavailable for these VMs yet."
        )

    return cleaned


def main() -> int:
    payload = json.load(sys.stdin)

    cp_map = payload.get("control_plane_vm_ipv4", {}).get("value", {})
    wk_map = payload.get("worker_vm_ipv4", {}).get("value", {})

    if not cp_map or not wk_map:
        raise SystemExit("Missing control_plane_vm_ipv4 or worker_vm_ipv4 in terraform output")

    cp_map = require_non_empty_ips("control planes", cp_map)
    wk_map = require_non_empty_ips("workers", wk_map)

    ssh_user = os.environ.get("KUBEADM_SSH_USER", "").strip() or "micqdf"

    print(f"SSH_USER={ssh_user}")
    print("PRIMARY_CONTROL_PLANE=cp-1")
    print(f"CONTROL_PLANES=\"{map_to_pairs(cp_map)}\"")
    print(f"WORKERS=\"{map_to_pairs(wk_map)}\"")
    return 0


if __name__ == "__main__":
    raise SystemExit(main())