monitoring posts to db

Case study 1/monitoring/collect-to-db.py

@@ -0,0 +1,80 @@
+from flask import Flask, request, jsonify
+import sqlite3
+from datetime import datetime
+import os
+
+app = Flask(__name__)
+DB_PATH = "metrics.db"
+
+# Creates the database table if it doesn't exist
+def init_db():
+    with sqlite3.connect(DB_PATH) as conn:
+        conn.execute("""
+            CREATE TABLE IF NOT EXISTS metrics (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                hostname TEXT,
+                os TEXT,
+                cpu_percent REAL,
+                memory_percent REAL,
+                disk_usage REAL,
+                timestamp TEXT
+            )
+        """)
+    print("Database initialized")
+
+# route for sending metrics
+@app.route('/collect', methods=['POST'])
+def collect():
+    data = request.get_json()
+
+    if not data or "hostname" not in data:
+        return jsonify({"error": "Invalid data"}), 400
+
+    timestamp = datetime.now().isoformat()
+
+    with sqlite3.connect(DB_PATH) as conn:
+        conn.execute("""
+            INSERT INTO metrics (hostname, os, cpu_percent, memory_percent, disk_usage, timestamp)
+            VALUES (?, ?, ?, ?, ?, ?)
+        """, (
+            data.get("hostname"),
+            data.get("os"),
+            data.get("cpu_percent"),
+            data.get("memory_percent"),
+            data.get("disk_usage"),
+            timestamp
+        ))
+        conn.commit()
+
+    print(f"[{timestamp}] Data received from {data.get('hostname')}")
+    return jsonify({"status": "stored"}), 200
+
+# for posting metrics which you can view in the browser 
+@app.route('/metrics', methods=['GET'])
+def list_metrics():
+    with sqlite3.connect(DB_PATH) as conn:
+        cursor = conn.execute("""
+            SELECT hostname, os, cpu_percent, memory_percent, disk_usage, timestamp
+            FROM metrics
+            ORDER BY id DESC
+            LIMIT 10
+        """)
+        rows = cursor.fetchall()
+
+    results = [
+        {
+            "hostname": row[0],
+            "os": row[1],
+            "cpu_percent": row[2],
+            "memory_percent": row[3],
+            "disk_usage": row[4],
+            "timestamp": row[5],
+        }
+        for row in rows
+    ]
+    return jsonify(results)
+
+if __name__ == '__main__':
+    if not os.path.exists(DB_PATH):
+        init_db()
+    app.run(host='0.0.0.0', port=5000)

Case study 1/monitoring/send_metrics.py

@@ -4,7 +4,7 @@ import requests
 import socket
 from datetime import datetime
 
-SERVER_URL = "http://localhost:5000/collect"  # change this!
+SERVER_URL = "http://localhost:5000/collect"
 
 def collect_metrics():
     data = {