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