{"id":209995,"date":"2025-10-24T02:48:29","date_gmt":"2025-10-23T18:48:29","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209995\/"},"modified":"2025-10-24T02:48:30","modified_gmt":"2025-10-23T18:48:30","slug":"cdn-231","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209995\/","title":{"rendered":"CDN \u8fd0\u7ef4\u7ba1\u7406\u5de5\u5177\u5bf9\u6bd4\uff1a\u6027\u80fd\u3001\u6210\u672c\u4e0e\u6613\u7528\u6027\u4e00\u6587\u770b\u61c2"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5316\u4e92\u8054\u7f51\u73af\u5883\u4e0b\uff0cCDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\u5df2\u7ecf\u6210\u4e3a\u63d0\u5347\u7f51\u7ad9\u6027\u80fd\u3001\u964d\u4f4e\u5ef6\u8fdf\u548c\u63d0\u5347\u53ef\u7528\u6027\u7684\u5173\u952e\u7ec4\u4ef6\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u548c\u5f00\u53d1\u8005\u800c\u8a00\uff0c\u9009\u62e9\u4e00\u6b3e\u5408\u9002\u7684 CDN \u8fd0\u7ef4\u7ba1\u7406\u5de5\u5177\uff0c\u4e0d\u4ec5\u5f71\u54cd\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u4e0e\u6210\u672c\uff0c\u8fd8\u5173\u7cfb\u5230\u8fd0\u7ef4\u6548\u7387\u4e0e\u6545\u969c\u54cd\u5e94\u80fd\u529b\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u5e94\u7528\u573a\u666f\u3001\u6027\u80fd\u3001\u6210\u672c\u4e0e\u6613\u7528\u6027\u7b49\u7ef4\u5ea6\uff0c\u6df1\u5165\u5bf9\u6bd4\u5e38\u89c1 CDN \u8fd0\u7ef4\u7ba1\u7406\u65b9\u6848\uff0c\u5e76\u7ed9\u51fa\u5b9e\u7528\u7684\u9009\u8d2d\u4e0e\u90e8\u7f72\u5efa\u8bae\u3002<\/p>\n<h2>CDN \u8fd0\u7ef4\u7ba1\u7406\u5de5\u5177\u7684\u6838\u5fc3\u539f\u7406\u4e0e\u5173\u952e\u6307\u6807<\/h2>\n<p>\u8981\u7406\u89e3\u8fd0\u7ef4\u5de5\u5177\uff0c\u9996\u5148\u8981\u660e\u786e CDN \u7684\u57fa\u672c\u539f\u7406\u3002CDN \u901a\u8fc7\u5728\u5168\u7403\u90e8\u7f72 POP\uff08Points of Presence\uff09\u8282\u70b9\uff0c\u628a\u9759\u6001\u548c\u90e8\u5206\u52a8\u6001\u5185\u5bb9\u7f13\u5b58\u5230\u79bb\u7528\u6237\u66f4\u8fd1\u7684\u4f4d\u7f6e\uff0c\u4ee5\u51cf\u5c11\u56de\u6e90\u8bf7\u6c42\u3001\u964d\u4f4e\u5e26\u5bbd\u6d88\u8017\u5e76\u7f29\u77ed\u54cd\u5e94\u65f6\u95f4\u3002\u8fd0\u7ef4\u7ba1\u7406\u5de5\u5177\u5219\u8d1f\u8d23\u914d\u7f6e\u7b56\u7565\u3001\u76d1\u63a7\u6307\u6807\u3001\u65e5\u5fd7\u5206\u6790\u3001\u7f13\u5b58\u7ba1\u7406\u3001\u8bc1\u4e66\u4e0e\u5b89\u5168\u9632\u62a4\u7b49\u4e00\u7cfb\u5217\u8fd0\u7ef4\u4efb\u52a1\u3002<\/p>\n<h3>\u5173\u952e\u6280\u672f\u6307\u6807<\/h3>\n<ul>\n<li><strong>\u547d\u4e2d\u7387\uff08Cache Hit Ratio\uff09<\/strong>\uff1a\u8861\u91cf\u4ece\u8fb9\u7f18\u8282\u70b9\u76f4\u63a5\u547d\u4e2d\u7684\u8bf7\u6c42\u6bd4\u4f8b\uff0c\u547d\u4e2d\u7387\u8d8a\u9ad8\uff0c\u56de\u6e90\u6d41\u91cf\u548c\u5ef6\u8fdf\u8d8a\u4f4e\u3002<\/li>\n<li><strong>\u54cd\u5e94\u65f6\u5ef6\uff08Latency \/ RTT\uff09<\/strong>\uff1a\u4e0d\u540c\u5730\u533a\uff08\u5982\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u3001\u7f8e\u56fd\uff09\u5230 POP \u7684\u5f80\u8fd4\u65f6\u95f4\uff0c\u76f4\u63a5\u5f71\u54cd\u9996\u5b57\u8282\u65f6\u95f4\uff08TTFB\uff09\u548c\u9875\u9762\u52a0\u8f7d\u901f\u5ea6\u3002<\/li>\n<li><strong>\u5e26\u5bbd\u5229\u7528\u4e0e\u6210\u672c<\/strong>\uff1a\u8fb9\u7f18\u6d41\u91cf\u8ba1\u8d39 vs \u56de\u6e90\u6d41\u91cf\u8ba1\u8d39\uff0c\u540c\u65f6\u8981\u8003\u8651\u5cf0\u503c\u5e26\u5bbd\u4e0e\u6d41\u91cf\u5305\u6298\u7b97\u3002<\/li>\n<li><strong>\u53ef\u7528\u6027\u4e0e\u5bb9\u707e<\/strong>\uff1a\u8282\u70b9\u5931\u6548\u65f6\u7684\u5207\u6362\u7b56\u7565\u3001\u5065\u5eb7\u68c0\u6d4b\u9891\u7387\u3001\u91cd\u8bd5\u4e0e\u9000\u907f\u673a\u5236\u3002<\/li>\n<li><strong>\u5b89\u5168\u6027<\/strong>\uff1aDDoS \u7f13\u89e3\u3001WAF\u3001\u9632\u76d7\u94fe\u3001\u8bc1\u4e66\u7ba1\u7406\uff08\u652f\u6301 SNI\u3001Let&#8217;s Encrypt\uff09\u3001TLS \u7248\u672c\u4e0e\u52a0\u5bc6\u5957\u4ef6\u3002<\/li>\n<\/ul>\n<h2>\u5e38\u89c1\u8fd0\u7ef4\u7ba1\u7406\u529f\u80fd\u6a21\u5757\u4e0e\u5b9e\u73b0\u65b9\u5f0f<\/h2>\n<p>\u4e00\u4e2a\u6210\u719f\u7684 CDN \u8fd0\u7ef4\u7ba1\u7406\u5de5\u5177\u901a\u5e38\u5305\u542b\u4ee5\u4e0b\u6a21\u5757\uff0c\u6bcf\u4e2a\u6a21\u5757\u7684\u5b9e\u73b0\u65b9\u5f0f\u4e0e\u53ef\u64cd\u4f5c\u6027\u76f4\u63a5\u5f71\u54cd\u8fd0\u7ef4\u6548\u7387\u3002<\/p>\n<h3>\u914d\u7f6e\u7ba1\u7406\u4e0e\u5206\u53d1\u7b56\u7565<\/h3>\n<ul>\n<li>\u652f\u6301\u57fa\u4e8e\u8def\u5f84\u3001\u6587\u4ef6\u7c7b\u578b\u3001\u8bf7\u6c42\u5934\u3001\u5730\u7406\u4f4d\u7f6e\u7684\u7f13\u5b58\u89c4\u5219\u4e0e\u56de\u6e90\u89c4\u5219\u3002<\/li>\n<li>\u63d0\u4f9b\u7248\u672c\u63a7\u5236\u3001\u7070\u5ea6\u53d1\u5e03\u4e0e\u56de\u6eda\u673a\u5236\uff0c\u65b9\u4fbf\u5728\u4e0d\u5f71\u54cd\u7ebf\u4e0a\u6d41\u91cf\u7684\u60c5\u51b5\u4e0b\u8c03\u6574\u7b56\u7565\u3002<\/li>\n<li>\u652f\u6301\u81ea\u5b9a\u4e49\u7f13\u5b58\u952e\uff08Cache Key\uff09\u548c\u67e5\u8be2\u53c2\u6570\u5904\u7406\uff08Ignore\/Include Query String\uff09\u3002<\/li>\n<\/ul>\n<h3>\u7f13\u5b58\u4e0e\u56de\u6e90\u63a7\u5236<\/h3>\n<ul>\n<li>\u652f\u6301 Cache-Control\u3001Expires\u3001ETag \u4e0e Last-Modified \u7b49\u6807\u51c6\u7f13\u5b58\u673a\u5236\u3002<\/li>\n<li>\u63d0\u4f9b\u8fb9\u7f18\u5237\u65b0\uff08Purge\/Invalidate\uff09API \u4e0e\u57fa\u4e8e\u524d\u7f00\u6216\u6b63\u5219\u7684\u6279\u91cf\u5237\u65b0\u529f\u80fd\uff0c\u4fbf\u4e8e\u5feb\u901f\u4e0b\u7ebf\u9519\u8bef\u8d44\u6e90\u3002<\/li>\n<li>\u5b9e\u73b0 Origin Shield \u6216\u4e2d\u95f4\u5c42\u56de\u6e90\u4f18\u5316\uff0c\u51cf\u5c11\u6e90\u7ad9\u538b\u529b\u4e0e\u56de\u6e90\u6b21\u6570\u3002<\/li>\n<\/ul>\n<h3>\u76d1\u63a7\u3001\u544a\u8b66\u4e0e\u65e5\u5fd7\u5206\u6790<\/h3>\n<ul>\n<li>\u5b9e\u65f6\u76d1\u63a7 QPS\u3001\u5e26\u5bbd\u3001\u9519\u8bef\u7387\u3001\u547d\u4e2d\u7387\u3001\u56de\u6e90\u91cf\u3001\u5404\u5730\u533a\u5ef6\u8fdf\u7b49\u6307\u6807\u3002<\/li>\n<li>\u652f\u6301\u7ec6\u7c92\u5ea6\u65e5\u5fd7\uff08edge access log\uff09\uff0c\u5e76\u80fd\u4e0e ELK\u3001Prometheus\u3001Grafana \u96c6\u6210\u8fdb\u884c\u53ef\u89c6\u5316\u5206\u6790\u3002<\/li>\n<li>\u544a\u8b66\u652f\u6301\u591a\u6e20\u9053\uff08\u90ae\u4ef6\u3001\u77ed\u4fe1\u3001Webhook\u3001PagerDuty\uff09\uff0c\u5e76\u80fd\u6309 SLA \u81ea\u52a8\u89e6\u53d1\u6545\u969c\u5904\u7f6e\u6d41\u7a0b\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5168\u4e0e\u5408\u89c4<\/h3>\n<ul>\n<li>\u96c6\u6210 WAF\u3001Bot \u7ba1\u7406\u3001\u901f\u7387\u9650\u5236\u3001\u5730\u7406\u5c01\u7981\u4e0e\u81ea\u5b9a\u4e49\u9632\u62a4\u89c4\u5219\u3002<\/li>\n<li>\u8bc1\u4e66\u81ea\u52a8\u5316\u7ba1\u7406\uff08ACME\uff09\u3001\u81ea\u7b7e\u6216\u7b2c\u4e09\u65b9\u8bc1\u4e66\u4e0a\u4f20\u4e0e\u7ba1\u7406\uff0c\u652f\u6301 HTTP\/2\u3001HTTP\/3\uff08QUIC\uff09\u3002<\/li>\n<li>\u65e5\u5fd7\u4e0e\u6570\u636e\u8bbf\u95ee\u63a7\u5236\uff0c\u7b26\u5408\u5730\u533a\u5408\u89c4\u8981\u6c42\uff08\u4f8b\u5982\u5bf9\u90e8\u7f72\u9999\u6e2f\u670d\u52a1\u5668\u6216\u65e5\u672c\u670d\u52a1\u5668\u7684\u7528\u6237\u5728\u6570\u636e\u9694\u79bb\u65b9\u9762\u7684\u8981\u6c42\uff09\u3002<\/li>\n<\/ul>\n<h2>\u6027\u80fd\u3001\u6210\u672c\u4e0e\u6613\u7528\u6027\u7684\u5bf9\u6bd4\u8981\u70b9<\/h2>\n<p>\u5728\u9009\u62e9\u8fd0\u7ef4\u5de5\u5177\u6216\u5e73\u53f0\u65f6\uff0c\u901a\u5e38\u9700\u8981\u5728\u6027\u80fd\u3001\u6210\u672c\u4e0e\u6613\u7528\u6027\u4e4b\u95f4\u505a\u6743\u8861\u3002\u4e0b\u9762\u4ece\u8fd9\u4e09\u65b9\u9762\u7ed9\u51fa\u6280\u672f\u7ec6\u8282\u4e0e\u8861\u91cf\u6807\u51c6\u3002<\/p>\n<h3>\u6027\u80fd\uff1a\u8282\u70b9\u5e03\u5c40\u4e0e\u534f\u8bae\u652f\u6301<\/h3>\n<ul>\n<li>\u8282\u70b9\u8986\u76d6\uff1a\u5bf9\u76ee\u6807\u7528\u6237\u7fa4\u4f53\uff0c\u8282\u70b9\u7684\u5730\u7406\u5206\u5e03\u5f88\u5173\u952e\u3002\u5982\u679c\u7528\u6237\u4e3b\u8981\u96c6\u4e2d\u5728\u4e9a\u592a\uff08\u9999\u6e2f\u3001\u97e9\u56fd\u3001\u65e5\u672c\u3001\u65b0\u52a0\u5761\uff09\uff0c\u4f18\u5148\u9009\u62e9\u5728\u8fd9\u4e9b\u5730\u533a\u6709\u4e30\u5bcc POP \u7684 CDN\uff0c\u80fd\u663e\u8457\u964d\u4f4e RTT\u3002<\/li>\n<li>\u534f\u8bae\u652f\u6301\uff1a\u652f\u6301 HTTP\/2\u3001HTTP\/3 \u53ef\u63d0\u5347\u5e76\u53d1\u8d44\u6e90\u7684\u4f20\u8f93\u6548\u7387\uff0c\u5c24\u5176\u5bf9\u79fb\u52a8\u7aef\u548c\u77ed\u8fde\u63a5\u573a\u666f\u6548\u679c\u660e\u663e\u3002<\/li>\n<li>\u52a8\u6001\u52a0\u901f\uff1a\u5bf9 API\u3001\u63a5\u53e3\u7c7b\u8bf7\u6c42\uff0cTCP\/TLS \u4f18\u5316\u3001\u8fde\u63a5\u590d\u7528\u548c\u667a\u80fd\u8def\u7531\uff08Anycast \u6216 BGP \u4f18\u5316\uff09\u80fd\u964d\u4f4e\u5ef6\u8fdf\u3002<\/li>\n<\/ul>\n<h3>\u6210\u672c\uff1a\u8ba1\u8d39\u6a21\u5f0f\u4e0e\u4f18\u5316\u624b\u6bb5<\/h3>\n<ul>\n<li>\u6309\u6d41\u91cf\u8ba1\u8d39 vs \u6309\u5e26\u5bbd\u8ba1\u8d39\uff1a\u6d41\u91cf\u578b\u9002\u5408\u4e0d\u7a33\u5b9a\u4f46\u603b\u91cf\u53ef\u63a7\u7684\u7ad9\u70b9\uff1b\u5e26\u5bbd\u5305\u6216\u6309\u5cf0\u503c\u8ba1\u8d39\u9002\u5408\u9ad8\u5e76\u53d1\u4f46\u6d41\u91cf\u53ef\u9884\u6d4b\u7684\u4e1a\u52a1\u3002<\/li>\n<li>\u56de\u6e90\u8d39\u7528\uff1a\u4f4e\u547d\u4e2d\u7387\u4f1a\u5bfc\u81f4\u9ad8\u56de\u6e90\u6d41\u91cf\uff0c\u4ece\u800c\u62ac\u9ad8\u6210\u672c\uff0c\u5efa\u8bae\u901a\u8fc7\u5408\u7406\u7684\u7f13\u5b58\u7b56\u7565\u4e0e\u957f\u7f13\u5b58\u65f6\u95f4\u964d\u4f4e\u56de\u6e90\u3002<\/li>\n<li>\u8fb9\u7f18\u8ba1\u7b97\u4e0e\u51fd\u6570\uff08Edge Compute\uff09\uff1a\u867d\u80fd\u964d\u4f4e\u56de\u6e90\u4e0e\u63d0\u5347\u54cd\u5e94\uff0c\u4f46\u901a\u5e38\u4f1a\u589e\u52a0\u6210\u672c\uff0c\u9700\u8981\u8bc4\u4f30\u4e1a\u52a1\u6536\u76ca\u3002<\/li>\n<\/ul>\n<h3>\u6613\u7528\u6027\uff1aUI\/UX\u3001\u81ea\u52a8\u5316\u4e0e API \u652f\u6301<\/h3>\n<ul>\n<li>\u63a7\u5236\u53f0\u662f\u5426\u76f4\u89c2\u3001\u662f\u5426\u6709\u6a21\u677f\u914d\u7f6e\uff08\u5982\u9759\u6001\u7ad9\u70b9\u3001API\u3001\u89c6\u9891\u70b9\u64ad\uff09\u4f1a\u76f4\u63a5\u5f71\u54cd\u4e0a\u624b\u901f\u5ea6\u3002<\/li>\n<li>\u5f3a\u5927\u7684 API \u652f\u6301\u4e0e IaC\uff08Infrastructure as Code\uff09\u96c6\u6210\u80fd\u529b\uff08\u5982 Terraform provider\uff09\u53ef\u5b9e\u73b0\u81ea\u52a8\u5316\u8fd0\u7ef4\uff0c\u9002\u5408\u5f00\u53d1\u56e2\u961f\u4e0e\u5927\u89c4\u6a21\u7ad9\u70b9\u3002<\/li>\n<li>\u65e5\u5fd7\u5206\u6790\u4e0e\u53ef\u89c6\u5316\uff1a\u5185\u7f6e\u62a5\u8868 vs \u5bfc\u51fa\u5230\u7b2c\u4e09\u65b9\u5206\u6790\u5e73\u53f0\uff0c\u51b3\u5b9a\u4e86\u6545\u969c\u5b9a\u4f4d\u7684\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2>\u4e0d\u540c\u5e94\u7528\u573a\u666f\u7684\u63a8\u8350\u7b56\u7565<\/h2>\n<p>\u9488\u5bf9\u4e0d\u540c\u4e1a\u52a1\u7c7b\u578b\u4e0e\u90e8\u7f72\u5730\u70b9\uff0c\u8fd0\u7ef4\u5de5\u5177\u4e0e CDN \u65b9\u6848\u7684\u4fa7\u91cd\u70b9\u5404\u4e0d\u76f8\u540c\u3002<\/p>\n<h3>\u9759\u6001\u7f51\u7ad9\u4e0e\u4f01\u4e1a\u5b98\u7f51\uff08\u542b\u57df\u540d\u6ce8\u518c\u7ba1\u7406\uff09<\/h3>\n<ul>\n<li>\u4f18\u5148\u63d0\u9ad8\u547d\u4e2d\u7387\u4e0e\u5f00\u542f\u957f\u7f13\u5b58\u7b56\u7565\uff0c\u7ed3\u5408\u7248\u672c\u5316\u9759\u6001\u8d44\u6e90\u6587\u4ef6\uff08hash \u547d\u540d\uff09\u6765\u4fdd\u8bc1\u66f4\u65b0\u53ef\u63a7\u3002<\/li>\n<li>\u8bc1\u4e66\u81ea\u52a8\u5316\u4e0e HTTP\/2 \u652f\u6301\u662f\u57fa\u7840\u9700\u6c42\uff0c\u57df\u540d\u6ce8\u518c\u4e4b\u540e\u7684 DNS \u4e0e CDN \u96c6\u6210\u9700\u8981\u65e0\u7f1d\u5feb\u6377\u3002<\/li>\n<li>\u82e5\u76ee\u6807\u7528\u6237\u5728\u4e9a\u592a\uff0c\u9009\u62e9\u5728\u9999\u6e2f\u670d\u52a1\u5668\u3001\u9999\u6e2fVPS \u6216 \u65b0\u52a0\u5761\u670d\u52a1\u5668 \u6709\u4f18\u52bf\u3002<\/li>\n<\/ul>\n<h3>API 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