155 lines
4.4 KiB
Python
155 lines
4.4 KiB
Python
import os
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import random
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import socket
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from datetime import datetime
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from flask import Flask, jsonify
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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": {
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"color": "#50C878",
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"name": "绿色升级版",
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"features": "新增健康检查、API接口",
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},
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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": {
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"color": "#E74C3C",
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"name": "红色测试版",
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"features": "⚠️ 此版本存在已知问题",
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},
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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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{
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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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)
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@app.route("/health")
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def health():
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if BUGGY and random.random() < 0.7:
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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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