Sanitized mirror from private repository - 2026-04-18 11:19:59 UTC

alerting/ntfy-bridge/Dockerfile

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+FROM python:3.11-slim
+WORKDIR /app
+RUN pip install --no-cache-dir flask requests gunicorn
+COPY app.py .
+CMD ["gunicorn", "--bind", "0.0.0.0:5001", "--workers", "2", "app:app"]

alerting/ntfy-bridge/app.py

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+from flask import Flask, request, jsonify
+import requests
+import os
+
+app = Flask(__name__)
+
+NTFY_URL = os.environ.get('NTFY_URL', 'http://NTFY:80')
+NTFY_TOPIC = os.environ.get('NTFY_TOPIC', 'homelab-alerts')
+
+def get_status_icon(severity, status):
+    if status == 'resolved':
+        return 'white_check_mark'
+    if severity == 'critical':
+        return 'rotating_light'
+    return 'warning'
+
+def get_priority(severity, status):
+    if status == 'resolved':
+        return '3'
+    if severity == 'critical':
+        return '5'
+    return '4'
+
+def format_alert(alert):
+    status = alert.get('status', 'firing')
+    labels = alert.get('labels', {})
+    annotations = alert.get('annotations', {})
+
+    alertname = labels.get('alertname', 'Unknown Alert')
+    severity = labels.get('severity', 'warning')
+    instance = labels.get('instance', 'unknown')
+
+    status_text = 'RESOLVED' if status == 'resolved' else 'FIRING'
+    title = f"{alertname} [{status_text}]"
+
+    summary = annotations.get('summary', '')
+    description = annotations.get('description', '')
+
+    body_parts = []
+    if summary:
+        body_parts.append(summary)
+    if description and description != summary:
+        body_parts.append(description)
+    if instance and instance != 'unknown':
+        body_parts.append(f"Host: {instance}")
+
+    body = '\n'.join(body_parts) if body_parts else f"Alert {status_text.lower()} on {instance}"
+
+    return title, body, severity, status
+
+@app.route('/alert', methods=['POST'])
+def handle_alert():
+    try:
+        data = request.json
+        alerts = data.get('alerts', [])
+
+        for alert in alerts:
+            title, body, severity, status = format_alert(alert)
+            priority = get_priority(severity, status)
+            tag = get_status_icon(severity, status)
+
+            response = requests.post(
+                f"{NTFY_URL}/{NTFY_TOPIC}",
+                data=body,
+                headers={
+                    'Title': title,
+                    'Priority': priority,
+                    'Tags': tag
+                }
+            )
+
+            if response.status_code not in [200, 201]:
+                print(f"Failed to send to ntfy: {response.status_code} - {response.text}")
+
+        return jsonify({'status': 'sent', 'count': len(alerts)})
+    except Exception as e:
+        print(f"Error: {e}")
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+@app.route('/health', methods=['GET'])
+def health():
+    return jsonify({'status': 'healthy'})
+
+@app.route('/test', methods=['POST'])
+def test():
+    try:
+        data = request.json or {}
+        message = data.get('message', 'Test notification from ntfy-bridge')
+
+        response = requests.post(
+            f"{NTFY_URL}/{NTFY_TOPIC}",
+            data=message,
+            headers={
+                'Title': 'Test Alert',
+                'Priority': '4',
+                'Tags': 'test_tube'
+            }
+        )
+        return jsonify({'status': 'sent'})
+    except Exception as e:
+        return jsonify({'status': 'error', 'message': str(e)}), 500
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=5001)