lab01: Nadezhda Tarubarova

app_python/app.py

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+import os
+import socket
+import platform
+import logging
+from datetime import datetime, timezone
+from flask import Flask, jsonify, request
+
+logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(name)s - %(levelname)s - %(message)s')
+logger = logging.getLogger(__name__)
+
+app = Flask(__name__)
+
+HOST = os.getenv('HOST', '0.0.0.0')
+PORT = int(os.getenv('PORT', 5000))
+START_TIME = datetime.now(timezone.utc)
+
+def get_system_info():
+    return {
+        'hostname': socket.gethostname(),
+        'platform': platform.system(),
+        'platform_version': platform.release(),
+        'architecture': platform.machine(),
+        'cpu_count': os.cpu_count(),
+        'python_version': platform.python_version()
+    }
+
+def get_uptime():
+    delta = datetime.now(timezone.utc) - START_TIME
+    seconds = int(delta.total_seconds())
+    hours, remainder = divmod(seconds, 3600)
+    minutes, _ = divmod(remainder, 60)
+    return {
+        'seconds': seconds,
+        'human': f"{hours} hour{'s' if hours != 1 else ''}, {minutes} minute{'s' if minutes != 1 else ''}"
+    }
+
+@app.route('/', methods=['GET'])
+def index():
+    logger.info(f"Request: {request.method} {request.path} from {request.remote_addr}")
+    uptime = get_uptime()
+    return jsonify({
+        "service": {
+            "name": "devops-info-service",
+            "version": "1.0.0",
+            "description": "DevOps course info service",
+            "framework": "Flask"
+        },
+        "system": get_system_info(),
+        "runtime": {
+            "uptime_seconds": uptime['seconds'],
+            "uptime_human": uptime['human'],
+            "current_time": datetime.now(timezone.utc).isoformat(),
+            "timezone": "UTC"
+        },
+        "request": {
+            "client_ip": request.remote_addr or 'unknown',
+            "user_agent": request.headers.get('User-Agent', 'unknown'),
+            "method": request.method,
+            "path": request.path
+        },
+        "endpoints": [
+            {"path": "/", "method": "GET", "description": "Service information"},
+            {"path": "/health", "method": "GET", "description": "Health check"}
+        ]
+    })
+
+@app.route('/health', methods=['GET'])
+def health():
+    return jsonify({
+        'status': 'healthy',
+        'timestamp': datetime.now(timezone.utc).isoformat(),
+        'uptime_seconds': get_uptime()['seconds']
+    })
+
+@app.errorhandler(404)
+def not_found(error):
+    return jsonify({'error': 'Not Found', 'message': 'Endpoint does not exist'}), 404
+
+@app.errorhandler(500)
+def internal_error(error):
+    return jsonify({'error': 'Internal Server Error', 'message': 'An unexpected error occurred'}), 500
+
+if __name__ == '__main__':
+    logger.info('Application starting...')
+    app.run(host=HOST, port=PORT, debug=False)

app_python/docs/LAB01.md

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+# LAB01 - DevOps Info Service
+
+## Framework Selection
+Flask 3.0.3 - lightweight framework suitable for simple APIs and microservices.
+
+## Best Practices Applied
+1. Structured logging with timestamps
+2. Error handling for 404/500 responses  
+3. Environment variables for configuration
+4. PEP8 compliant code organization
+
+## API Documentation
+GET / - Service and system information
+GET /health - Health check endpoint
+
+text
+
+## Testing Evidence
+![Main endpoint](screenshots/01-main-endpoint.png)
+![Health check](screenshots/02-health-check.png)
+![Terminal output](screenshots/03-formatted-output.png)
+
+## GitHub Community Engagement
+- Starred: inno-devops-labs/DevOps-Core-Course
+- Starred: simple-container-com/api
+- Following: Cre-eD, marat-biriushev, pierrepicaud
+- Following 3 classmates
+
+Stars increase project visibility. Following helps track best practices.
+
+## Challenges & Solutions
+- Windows venv activation via direct python.exe path
+- Client IP shows 127.0.0.1 for localhost correctly

app_python/requirements.txt

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+Flask==3.0.3