Server‑Monitoring als Widget.

#!/usr/bin/env python3
# Proxmox as an Andon view: nodes and guests, from the cluster's own API.
# Runs on a Proxmox node, where pvesh is. Writes the document to stdout;
# andon_seal.py seals and sends it. The status is decided HERE.
import json, subprocess, sys
from datetime import datetime, timezone

res = json.loads(subprocess.run(
    ["pvesh", "get", "/cluster/resources", "--output-format", "json"],
    check=True, capture_output=True, text=True).stdout)

nodes  = [r for r in res if r["type"] == "node"]
guests = [r for r in res if r["type"] in ("qemu", "lxc") and not r.get("template")]
online  = sum(n["status"] == "online" for n in nodes)
running = sum(g["status"] == "running" for g in guests)

def row(g):
    ram = round(100 * g["mem"] / g["maxmem"]) if g.get("maxmem") else None
    cells = [g.get("name") or str(g["vmid"]), g["node"], round(100 * g.get("cpu", 0)), ram]
    # A stopped guest gets no colour: it may be stopped on purpose.
    return {"cells": cells, "status": "ok"} if g["status"] == "running" else {"cells": cells}

guests.sort(key=lambda g: (g["status"] != "running", g.get("name") or ""))

json.dump({
    "id": "5d0e8b47-2a19-4c63-9f8e-7b1a3c6d2e90",
    "schemaVersion": 1,
    "name": "Proxmox",
    "generatedAt": datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ"),
    "staleAfterSec": 300,
    "tiles": [
        {"id": "t_nodes", "view": "label", "title": "Nodes online", "titleShort": "Nodes",
         "icon": "server.rack", "value": online, "subtext": f"of {len(nodes)}",
         "status": "ok" if online == len(nodes) else "critical"},
        {"id": "t_guests", "view": "label", "title": "Guests running", "titleShort": "Guests",
         "icon": "shippingbox", "value": running, "subtext": f"of {len(guests)}"},
        {"id": "t_list", "view": "table", "title": "Guests", "icon": "list.bullet",
         "columns": [{"title": "Name"}, {"title": "Node"},
                     {"title": "CPU", "unit": "%", "decimals": 0},
                     {"title": "RAM", "unit": "%", "decimals": 0}],
         "rows": [row(g) for g in guests[:20]]},
    ],
}, sys.stdout)