{"id":210029,"date":"2025-10-24T04:17:01","date_gmt":"2025-10-23T20:17:01","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210029\/"},"modified":"2025-10-24T04:17:02","modified_gmt":"2025-10-23T20:17:02","slug":"cdn-248","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210029\/","title":{"rendered":"\u5b9e\u65f6\u638c\u63a7CDN\u8282\u70b9\u8d1f\u8f7d\uff1a\u667a\u80fd\u76d1\u63a7\u4e0e\u8c03\u5ea6\u5b9e\u6218"},"content":{"rendered":"<p>\u5728\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u67b6\u6784\u4e2d\uff0c<strong>\u8282\u70b9\u8d1f\u8f7d\u7684\u5b9e\u65f6\u638c\u63a7<\/strong>\u76f4\u63a5\u5173\u7cfb\u5230\u7528\u6237\u4f53\u9a8c\u4e0e\u6210\u672c\u6548\u7387\u3002\u65e0\u8bba\u662f\u9762\u5411\u4e9a\u6d32\u5e02\u573a\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\uff0c\u8fd8\u662f\u5e03\u5c40\u5317\u7f8e\u9009\u62e9\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u7f8e\u56fdVPS\uff0c\u5b9e\u65f6\u76d1\u63a7\u4e0e\u667a\u80fd\u8c03\u5ea6\u80fd\u529b\u90fd\u662f\u4fdd\u969c\u7a33\u5b9a\u6027\u548c\u6027\u80fd\u7684\u6838\u5fc3\u3002\u672c\u7bc7\u6587\u7ae0\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u6df1\u5165\u5256\u6790\u5b9e\u65f6\u76d1\u63a7\u4e0e\u8c03\u5ea6\u7684\u539f\u7406\u3001\u5b9e\u73b0\u7ec6\u8282\u3001\u5e94\u7528\u573a\u666f\u4e0e\u9009\u8d2d\u5efa\u8bae\uff0c\u5e2e\u52a9\u4f60\u6784\u5efa\u9ad8\u53ef\u7528\u3001\u53ef\u89c2\u6d4b\u4e14\u53ef\u6269\u5c55\u7684CDN\u8282\u70b9\u7ba1\u7406\u4f53\u7cfb\u3002<\/p>\n<h2>\u5f15\u8a00\uff1a\u4e3a\u4ec0\u4e48\u9700\u8981\u5b9e\u65f6\u638c\u63a7CDN\u8282\u70b9\u8d1f\u8f7d<\/h2>\n<p>\u968f\u7740\u89c6\u9891\u3001\u6e38\u620f\u3001\u7535\u5b50\u5546\u52a1\u7b49\u4e1a\u52a1\u5bf9\u5ef6\u8fdf\u548c\u5e26\u5bbd\u8981\u6c42\u7684\u63d0\u9ad8\uff0c\u5355\u7eaf\u4f9d\u8d56\u9759\u6001\u914d\u7f6e\u7684CDN\u8282\u70b9\u5df2\u65e0\u6cd5\u6ee1\u8db3\u52a8\u6001\u6d41\u91cf\u6ce2\u52a8\u7684\u9700\u6c42\u3002\u7279\u522b\u662f\u5728\u591a\u533a\u57df\u90e8\u7f72\uff08\u5982\u9999\u6e2fVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u3001\u65b0\u52a0\u5761\u670d\u52a1\u5668\u4ee5\u53ca\u7f8e\u56fdVPS\uff09\u65f6\uff0c\u6d41\u91cf\u6a21\u5f0f\u4f1a\u968f\u65f6\u533a\u3001\u8425\u9500\u6d3b\u52a8\u6216\u7a81\u53d1\u4e8b\u4ef6\u5267\u70c8\u53d8\u5316\u3002<strong>\u5b9e\u65f6\u76d1\u63a7\u80fd\u53ca\u65f6\u63ed\u793a\u74f6\u9888\uff0c\u667a\u80fd\u8c03\u5ea6\u80fd\u5c06\u6d41\u91cf\u5f15\u5bfc\u5230\u6700\u9002\u5408\u7684\u8282\u70b9\uff0c\u4ece\u800c\u964d\u4f4e\u4e22\u5305\u3001\u5ef6\u8fdf\u4e0e\u56de\u6e90\u6210\u672c<\/strong>\u3002<\/p>\n<h2>\u539f\u7406\uff1a\u4ece\u76d1\u63a7\u5230\u8c03\u5ea6\u7684\u95ed\u73af\u4f53\u7cfb<\/h2>\n<h3>\u5173\u952e\u89c2\u6d4b\u6307\u6807<\/h3>\n<ul>\n<li>\u8d44\u6e90\u5c42\u9762\uff1aCPU\u3001\u5185\u5b58\u3001\u78c1\u76d8 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CPU&gt;80%\u3001RPS&gt;\u9608\u503c\u3001\u9519\u8bef\u7387\u4e0a\u5347\uff09\u89e6\u53d1\u9884\u5b9a\u4e49\u52a8\u4f5c\uff08\u4e0b\u7ebf\u8282\u70b9\u3001\u964d\u7ea7\u7f13\u5b58\u7b56\u7565\u3001\u5207\u6362\u540e\u7aef\uff09\u3002<\/li>\n<li>\u667a\u80fd\u4f18\u5316\uff1a\u4f7f\u7528\u8d1f\u8f7d\u9884\u6d4b\uff08\u65f6\u95f4\u5e8f\u5217\u6a21\u578b\u5982 ARIMA\u3001Prophet\uff0c\u6216\u6df1\u5ea6\u5b66\u4e60 LSTM\uff09\u3001\u5f02\u5e38\u68c0\u6d4b\uff08\u57fa\u4e8e z-score\u3001EWMA \u6216 Isolation Forest\uff09\u4ee5\u53ca\u5f3a\u5316\u5b66\u4e60\u5b9e\u73b0\u81ea\u52a8\u5316\u6d41\u91cf\u5206\u914d\u3002<\/li>\n<\/ul>\n<h3>\u63a7\u5236\u6267\u884c\u5c42\uff1a\u8c03\u5ea6\u4e0e\u6d41\u91cf\u7ba1\u63a7<\/h3>\n<p>\u63a7\u5236\u6267\u884c\u5c42\u8d1f\u8d23\u628a\u51b3\u7b56\u4e0b\u53d1\u5230\u8d1f\u8f7d\u5747\u8861\u5668\u3001\u8def\u7531\u5668\u6216 DNS \u5c42\u9762\uff0c\u5e38\u89c1\u624b\u6bb5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>Anycast + BGP\uff1a\u901a\u8fc7 Anycast \u5ba3\u544a\u5c06\u7528\u6237\u5f15\u5bfc\u81f3\u6700\u8fd1\u4e14\u53ef\u7528\u7684 POP\uff0c\u9002\u7528\u4e8e\u8fb9\u7f18\u8282\u70b9\u8f83\u591a\u7684\u5168\u7403 CDN\u3002<\/li>\n<li>\u57fa\u4e8e\u5730\u7406\/ASN \u7684 DNS \u89e3\u6790\uff1a\u901a\u8fc7 GeoDNS \u6216\u6743\u91cd DNS \u8c03\u5ea6\u6d41\u91cf\u3002<\/li>\n<li>\u8fb9\u7f18\u8d1f\u8f7d\u5747\u8861\u5668\uff08Nginx\u3001HAProxy\u3001Envoy\uff09\uff1a\u5b9e\u65f6\u4fee\u6539\u6743\u91cd\u6216\u4e0b\u7ebf\u5b9e\u4f8b\u4ee5\u5b9e\u73b0\u5e73\u6ed1\u6d41\u91cf\u8fc1\u79fb\u3002<\/li>\n<li>HTTP \u91cd\u5b9a\u5411\u4e0e\u6d41\u91cf\u955c\u50cf\uff1a\u77ed\u671f\u5185\u7528\u4e8e\u6d41\u91cf\u65c1\u8def\u6216\u7070\u5ea6\u9a8c\u8bc1\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u73b0\u7ec6\u8282<\/h2>\n<h3>\u573a\u666f\u4e00\uff1a\u7a81\u53d1\u6d41\u91cf\uff08\u79d2\u7ea7\u6216\u5206\u949f\u7ea7\uff09<\/h3>\n<p>\u5b9e\u73b0\u601d\u8def\uff1a<\/p>\n<ul>\n<li>\u5b9e\u65f6\u91c7\u96c6 RPS\u3001\u8fde\u63a5\u6570\u3001\u961f\u5217\u957f\u5ea6\uff1b\u8bbe\u7f6e\u591a\u7ea7\u544a\u8b66\uff08\u9884\u8b66\/\u5173\u952e\uff09\u3002<\/li>\n<li>\u5f53\u5355\u70b9\u9608\u503c\u89e6\u53d1\u65f6\uff0c\u81ea\u52a8\u589e\u52a0\u8be5\u533a\u57df\u8282\u70b9\u6743\u91cd\u81f3\u5176\u4ed6\u8282\u70b9\u7684\u5206\u914d\u6bd4\u91cd\u6216\u89e6\u53d1\u5f39\u6027\u6269\u7f29\u5bb9\uff08\u5728\u79c1\u6709\u4e91\u6216\u516c\u6709\u4e91\u4e0a\u8c03\u7528 API \u542f\u52a8\u65b0\u5b9e\u4f8b\uff09\u3002<\/li>\n<li>\u77ed\u671f\u5185\u901a\u8fc7\u8c03\u6574\u7f13\u5b58\u7b56\u7565\uff08\u5ef6\u957f TTL\u3001\u964d\u4f4e\u56de\u6e90\u9891\u7387\uff09\u7f13\u89e3\u56de\u6e90\u538b\u529b\u3002<\/li>\n<\/ul>\n<p>\u6280\u672f\u7ec6\u8282\u793a\u4f8b\uff1a\u4f7f\u7528 Prometheus Alertmanager \u914d\u5408 Kubernetes Horizontal Pod Autoscaler\uff08HPA\uff09\u6216 OpenStack API\uff0c\u5b9e\u73b0\u57fa\u4e8e\u81ea\u5b9a\u4e49\u6307\u6807\u7684\u5f39\u6027\u6269\u5bb9\u3002<\/p>\n<h3>\u573a\u666f\u4e8c\uff1a\u8282\u70b9\u5065\u5eb7\u9000\u5316\uff08\u7f51\u7edc\u6296\u52a8\u6216\u786c\u4ef6\u5f02\u5e38\uff09<\/h3>\n<p>\u5b9e\u73b0\u601d\u8def\uff1a<\/p>\n<ul>\n<li>\u63a2\u9488\u4e0e\u5065\u5eb7\u68c0\u67e5\uff1a\u91c7\u7528\u4e3b\u52a8\uff08TCP\/HTTP \u63a2\u6d4b\uff09\u4e0e\u88ab\u52a8\uff08\u9519\u8bef\u7387\/RTT \u4e0a\u5347\uff09\u7ed3\u5408\u7684\u65b9\u6cd5\u3002<\/li>\n<li>\u5f15\u5165\u7194\u65ad\u4e0e\u964d\u7ea7\u7b56\u7565\uff1a\u5728\u9519\u8bef\u7387\u9ad8\u6216\u54cd\u5e94\u8d85\u65f6\u573a\u666f\u4e0b\uff0c\u7194\u65ad\u6a21\u5757\u4f1a\u62d2\u7edd\u5c06\u65b0\u4f1a\u8bdd\u5206\u914d\u5230\u8be5\u8282\u70b9\u5e76\u9010\u6b65\u6062\u590d\u6d41\u91cf\u3002<\/li>\n<li>\u56de\u9000\u673a\u5236\uff1a\u5728 Anycast \u573a\u666f\u4e0b\uff0c\u64a4\u56de BGP \u5ba3\u544a\u6216\u8c03\u6574\u8def\u7531\u7b56\u7565\uff1b\u5728 DNS 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\u4ee5\u5b9e\u73b0\u5feb\u901f\u5207\u6362\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e09\uff1a\u591a\u533a\u57df\u6d41\u91cf\u4f18\u5316\uff08\u8de8\u56fd\/\u8de8\u5730\u533a\uff09<\/h3>\n<p>\u5b9e\u73b0\u601d\u8def\uff1a<\/p>\n<ul>\n<li>\u6784\u5efa\u591a\u7ef4\u6307\u6807\uff08\u5730\u57df\u5ef6\u8fdf\u3001\u5e26\u5bbd\u6210\u672c\u3001\u6cd5\u5f8b\u5408\u89c4\uff09\u4f5c\u4e3a\u8c03\u5ea6\u8f93\u5165\u3002<\/li>\n<li>\u5bf9\u4e9a\u6d32\u7528\u6237\u4f18\u5148\u9009\u62e9\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u4ee5\u964d\u4f4e\u5ef6\u8fdf\uff1b\u5bf9\u65e5\u672c\u3001\u97e9\u56fd\u7528\u6237\u4f18\u5148\u9009\u62e9\u65e5\u672c\u670d\u52a1\u5668\u6216\u97e9\u56fd\u670d\u52a1\u5668\u3002<\/li>\n<li>\u7ed3\u5408\u56de\u6e90\u6210\u672c\u4e0e\u5e26\u5bbd\u4ef7\u683c\u6a21\u578b\uff08\u9999\u6e2f\u4e0e\u65b0\u52a0\u5761\u5e26\u5bbd\u5dee\u5f02\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u56de\u6e90\u8d39\u7528\uff09\u667a\u80fd\u5206\u914d\u51b7\u6570\u636e\u4e0e\u70ed\u6570\u636e\u3002<\/li>\n<\/ul>\n<h2>\u4f18\u52bf\u5bf9\u6bd4\uff1a\u4e0d\u540c\u8c03\u5ea6\u7b56\u7565\u7684\u5229\u5f0a<\/h2>\n<h3>Anycast 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