Update app.py

2025-12-17 08:51:11 +08:00
commit 2bf72e1feb
5 changed files with 301 additions and 0 deletions
--- a/app.py
+++ b/app.py
@@ -0,0 +1,139 @@
+from flask import Flask, jsonify
+import socket
+import os
+from datetime import datetime
+import random
+
+app = Flask(__name__)
+
+# 从环境变量读取版本号
+VERSION = os.getenv('APP_VERSION', 'v1.0')
+BUGGY = os.getenv('BUGGY', 'false').lower() == 'true'
+
+# 版本主题配置
+THEMES = {
+    'v1.0': {'color': '#4A90E2', 'name': '蓝色经典版', 'features': '基础功能'},
+    'v2.0': {'color': '#50C878', 'name': '绿色升级版', 'features': '新增健康检查、API接口'},
+    'v2.1': {'color': '#50C878', 'name': '绿色稳定版', 'features': '性能优化、Bug修复'},
+    'v3.0-buggy': {'color': '#E74C3C', 'name': '红色测试版', 'features': '⚠️ 此版本存在已知问题'}
+}
+
+@app.route('/')
+def hello():
+    # 模拟 v3.0-buggy 的问题
+    if BUGGY and random.random() < 0.5:
+        return "💥 服务异常：数据库连接失败", 500
+
+    theme = THEMES.get(VERSION, THEMES['v1.0'])
+
+    return f"""
+    <!DOCTYPE html>
+    <html>
+    <head>
+        <title>Docker Swarm 滚动更新演示</title>
+        <meta charset="utf-8">
+        <meta http-equiv="refresh" content="3">
+        <style>
+            body {{
+                font-family: Arial;
+                max-width: 700px;
+                margin: 50px auto;
+                padding: 30px;
+                background: linear-gradient(135deg, {theme['color']}22 0%, {theme['color']}44 100%);
+            }}
+            .header {{
+                background: {theme['color']};
+                color: white;
+                padding: 20px;
+                border-radius: 10px 10px 0 0;
+                text-align: center;
+            }}
+            .info {{
+                background: white;
+                padding: 20px;
+                border-radius: 0 0 10px 10px;
+                box-shadow: 0 4px 6px rgba(0,0,0,0.1);
+            }}
+            .highlight {{
+                color: {theme['color']};
+                font-weight: bold;
+                font-size: 1.2em;
+            }}
+            .version-badge {{
+                display: inline-block;
+                background: {theme['color']};
+                color: white;
+                padding: 5px 15px;
+                border-radius: 20px;
+                font-size: 0.9em;
+                margin-top: 10px;
+            }}
+            table {{
+                width: 100%;
+                border-collapse: collapse;
+                margin-top: 15px;
+            }}
+            td {{
+                padding: 10px;
+                border-bottom: 1px solid #eee;
+            }}
+            td:first-child {{
+                color: #666;
+                width: 40%;
+            }}
+            .auto-refresh {{
+                color: #999;
+                font-size: 0.85em;
+                text-align: center;
+                margin-top: 15px;
+            }}
+        </style>
+    </head>
+    <body>
+        <div class="header">
+            <h1>🚀 {theme['name']}</h1>
+            <div class="version-badge">版本 {VERSION}</div>
+        </div>
+        <div class="info">
+            <table>
+                <tr>
+                    <td>📦 容器主机名</td>
+                    <td class="highlight">{socket.gethostname()}</td>
+                </tr>
+                <tr>
+                    <td>🎓 学号服务</td>
+                    <td class="highlight">s{os.getenv('STUDENT_ID', '00')}</td>
+                </tr>
+                <tr>
+                    <td>⏰ 当前时间</td>
+                    <td class="highlight">{datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</td>
+                </tr>
+                <tr>
+                    <td>✨ 版本特性</td>
+                    <td class="highlight">{theme['features']}</td>
+                </tr>
+            </table>
+            <div class="auto-refresh">🔄 页面每3秒自动刷新，观察容器变化</div>
+        </div>
+    </body>
+    </html>
+    """
+
+@app.route('/api/version')
+def version():
+    return jsonify({
+        'version': VERSION,
+        'hostname': socket.gethostname(),
+        'student_id': os.getenv('STUDENT_ID', '00'),
+        'timestamp': datetime.now().isoformat(),
+        'buggy': BUGGY
+    })
+
+@app.route('/health')
+def health():
+    if BUGGY and random.random() < 0.3:
+        return {'status': 'unhealthy'}, 503
+    return {'status': 'healthy', 'version': VERSION}, 200
+
+if __name__ == '__main__':
+    app.run(host='0.0.0.0', port=80)