feat: add backup-status service (port 9999, push API for borgmatic)

backup-status/Dockerfile

@@ -0,0 +1,5 @@
+FROM python:3.12-slim
+RUN pip install flask
+WORKDIR /app
+COPY app.py .
+CMD ["python", "app.py"]

backup-status/app.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""
+Backup Status API
+Hosts push after borgmatic backup, n8n polls this endpoint.
+GET  /          → JSON summary of all hosts
+POST /push?host=<name>&status=ok|error&msg=<text>  → update host status
+"""
+from flask import Flask, request, jsonify
+import json, os, time
+
+app = Flask(__name__)
+DATA_FILE = "/data/backup_status.json"
+
+def load():
+    if os.path.exists(DATA_FILE):
+        with open(DATA_FILE) as f:
+            return json.load(f)
+    return {}
+
+def save(data):
+    os.makedirs(os.path.dirname(DATA_FILE), exist_ok=True)
+    with open(DATA_FILE, "w") as f:
+        json.dump(data, f, indent=2)
+
+@app.route("/")
+def status():
+    data = load()
+    now = time.time()
+    result = {}
+    for host, info in data.items():
+        age_h = (now - info.get("ts", 0)) / 3600
+        if age_h > 26:
+            s = "KEIN BACKUP"
+        elif info.get("status") == "error":
+            s = "FEHLER"
+        else:
+            s = "OK"
+        result[host] = {
+            "status": s,
+            "last_backup": info.get("time", "unbekannt"),
+            "msg": info.get("msg", ""),
+            "age_h": round(age_h, 1)
+        }
+    return jsonify(result)
+
+@app.route("/push", methods=["POST", "GET"])
+def push():
+    host = request.args.get("host") or request.form.get("host")
+    status = request.args.get("status", "ok")
+    msg = request.args.get("msg", "")
+    if not host:
+        return jsonify({"error": "host parameter required"}), 400
+    data = load()
+    data[host] = {
+        "status": status,
+        "msg": msg,
+        "ts": time.time(),
+        "time": time.strftime("%Y-%m-%d %H:%M")
+    }
+    save(data)
+    return jsonify({"ok": True, "host": host, "status": status})
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", port=9999)

compose.yaml

@@ -152,3 +152,13 @@ services:
       - '--collector.filesystem.ignored-mount-points=^/(sys|proc|dev|host|etc)($|/)'
     restart: unless-stopped
 
+  backup-status:
+    build: ./backup-status
+    container_name: backup-status
+    restart: always
+    ports:
+      - "9999:9999"
+    volumes:
+      - /app-config/backup_status_data:/data
+    networks:
+      - monitoring_network