{"id":210053,"date":"2025-10-24T04:38:57","date_gmt":"2025-10-23T20:38:57","guid":{"rendered":"https:\/\/www.server.hk\/blog\/210053\/"},"modified":"2025-10-24T04:38:58","modified_gmt":"2025-10-23T20:38:58","slug":"cdn-260","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/210053\/","title":{"rendered":"CDN\u65e5\u5fd7\u5206\u6790\u4e0e\u544a\u8b66\u5b9e\u6218\uff1a\u5feb\u901f\u68c0\u6d4b\u5f02\u5e38\u4e0e\u81ea\u52a8\u5316\u544a\u8b66\u914d\u7f6e"},"content":{"rendered":"<p>\u968f\u7740\u7f51\u7ad9\u548c\u5e94\u7528\u6d41\u91cf\u7684\u5feb\u901f\u589e\u957f\uff0cCDN \u5df2\u6210\u4e3a\u63d0\u5347\u8bbf\u95ee\u901f\u5ea6\u548c\u6297\u653b\u51fb\u80fd\u529b\u7684\u91cd\u8981\u57fa\u7840\u8bbe\u65bd\u3002\u5bf9\u4e8e\u7ad9\u957f\u4e0e\u4f01\u4e1a\u7528\u6237\u800c\u8a00\uff0c<strong>\u5bf9 CDN \u65e5\u5fd7\u8fdb\u884c\u6df1\u5165\u5206\u6790\u5e76\u914d\u5957\u81ea\u52a8\u5316\u544a\u8b66<\/strong>\uff0c\u4e0d\u4ec5\u80fd\u5feb\u901f\u53d1\u73b0\u6d41\u91cf\u5f02\u5e38\u3001\u7f13\u5b58\u51fb\u7a7f\u3001\u722c\u866b\u722c\u53d6\u6216 DDoS \u653b\u51fb\uff0c\u8fd8\u80fd\u4e3a\u8fd0\u7ef4\u548c\u4e1a\u52a1\u51b3\u7b56\u63d0\u4f9b\u6570\u636e\u652f\u6301\u3002\u672c\u6587\u9762\u5411\u5f00\u53d1\u8005\u4e0e\u8fd0\u7ef4\u5de5\u7a0b\u5e08\uff0c\u4ecb\u7ecd\u4ece\u65e5\u5fd7\u6536\u96c6\u3001\u89e3\u6790\u5230\u544a\u8b66\u8bbe\u8ba1\u4e0e\u81ea\u52a8\u5316\u843d\u5730\u7684\u5b9e\u6218\u65b9\u6cd5\u3002<\/p>\n<h2>CDN \u65e5\u5fd7\u5206\u6790\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN \u65e5\u5fd7\u5e38\u89c1\u5b57\u6bb5\u5305\u62ec\u65f6\u95f4\u6233\u3001\u5ba2\u6237\u7aef IP\u3001\u8bf7\u6c42\u65b9\u6cd5\u3001\u8bf7\u6c42 URL\u3001\u72b6\u6001\u7801\u3001\u8fd4\u56de\u5927\u5c0f\u3001\u6765\u6e90\u8282\u70b9\uff08POP\uff09\u3001\u7f13\u5b58\u547d\u4e2d\/\u672a\u547d\u4e2d\u3001\u4e0a\u6e38\u8017\u65f6\u3001User-Agent\u3001Referer \u7b49\u3002\u901a\u8fc7\u8fd9\u4e9b\u5b57\u6bb5\u53ef\u4ee5\u8fd8\u539f\u8bf7\u6c42\u94fe\u8def\u5e76\u8bc6\u522b\u5f02\u5e38\u6a21\u5f0f\u3002<\/p>\n<h3>\u65e5\u5fd7\u91c7\u96c6\u4e0e\u4f20\u8f93<\/h3>\n<ul>\n<li>\u5b9e\u65f6\u91c7\u96c6\uff1a\u901a\u8fc7 CDN \u63d0\u4f9b\u7684\u5b9e\u65f6\u63a8\u9001\uff08\u4f8b\u5982 HTTP Push\u3001Kafka \u6216 S3 \u65e5\u5fd7\u6295\u9012\uff09\u5c06\u65e5\u5fd7\u53d1\u9001\u5230\u96c6\u4e2d\u7cfb\u7edf\u3002<\/li>\n<li>\u6279\u91cf\u62c9\u53d6\uff1a\u5b9a\u65f6\u4ece\u5bf9\u8c61\u5b58\u50a8\u62c9\u53d6\u538b\u7f29\u65e5\u5fd7\uff0c\u9002\u5408\u79bb\u7ebf\u5206\u6790\u4e0e\u5386\u53f2\u5f52\u6863\u3002<\/li>\n<li>\u4f20\u8f93\u4fdd\u969c\uff1a\u4f7f\u7528 TLS\u3001\u91cd\u8bd5\u4e0e\u5e42\u7b49\u5199\u5165\u4ee5\u4fdd\u8bc1\u65e5\u5fd7\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u6790\u4e0e\u7ed3\u6784\u5316<\/h3>\n<p>\u5c06\u6587\u672c\u65e5\u5fd7\u7ed3\u6784\u5316\u662f\u5173\u952e\u6b65\u9aa4\u3002\u5e38\u89c1\u5de5\u5177\uff1a<\/p>\n<ul>\n<li><strong>Filebeat + Logstash<\/strong>\uff1a\u5728\u8fb9\u7f18\u505a\u8f7b\u91cf\u91c7\u96c6\uff0cLogstash \u8fdb\u884c grok\/regex \u89e3\u6790\u4e0e\u5b57\u6bb5\u62bd\u53d6\u3002<\/li>\n<li><strong>Fluentd\/Fluent Bit<\/strong>\uff1a\u9002\u7528\u4e8e\u5bb9\u5668\u5316\/\u8fb9\u7f18\u73af\u5883\uff0c\u652f\u6301\u63d2\u4ef6\u4e30\u5bcc\u7684\u8f93\u51fa\u76ee\u6807\u3002<\/li>\n<li><strong>\u81ea\u7814\u89e3\u6790<\/strong>\uff1a\u4f7f\u7528 Go\/Python \u6309\u884c\u89e3\u6790\u5e76\u8f93\u51fa JSON\uff0c\u7528\u4e8e\u9ad8\u541e\u5410\u573a\u666f\u3002<\/li>\n<\/ul>\n<p>\u89e3\u6790\u65f6\u8981\u5904\u7406\u65f6\u533a\u3001\u65f6\u95f4\u6233\u683c\u5f0f\u3001URL \u89e3\u7801\u3001\u4ee5\u53ca\u8de8\u57df\u65e5\u5fd7\u5b57\u6bb5\u4e00\u81f4\u6027\uff08\u4e0d\u540c POP \u7684\u5b57\u6bb5\u540d\u53ef\u80fd\u4e0d\u540c\uff09\u3002\u5efa\u8bae\u7edf\u4e00\u65f6\u95f4\u4e3a UTC \u5e76\u4ee5 ISO8601 \u5b58\u50a8\u3002<\/p>\n<h2>\u5f02\u5e38\u68c0\u6d4b\u65b9\u6cd5\u4e0e\u89c4\u5219\u8bbe\u8ba1<\/h2>\n<p>\u5f02\u5e38\u68c0\u6d4b\u5e76\u4e0d\u53ea\u9760\u7b80\u5355\u9608\u503c\uff0c\u7ed3\u5408\u7edf\u8ba1\u5b66\u548c\u884c\u4e3a\u6a21\u578b\u80fd\u66f4\u51c6\u786e\u5730\u8bc6\u522b\u95ee\u9898\u3002<\/p>\n<h3>\u57fa\u4e8e\u9608\u503c\u7684\u544a\u8b66<\/h3>\n<ul>\n<li>\u603b\u6d41\u91cf \/ \u8bf7\u6c42\u6570\uff1a\u77ed\u671f\u5185\u7a81\u589e\uff08\u5982 5 \u5206\u949f\u5185\u6d41\u91cf &gt; \u5e73\u5747 3 \u500d\uff09\u89e6\u53d1\u544a\u8b66\u3002<\/li>\n<li>\u9519\u8bef\u7387\uff1a5xx \u6216 4xx \u6bd4\u4f8b\u6301\u7eed\u4e0a\u5347\uff08\u9608\u503c\u5982 &gt; 3%\uff09\u65f6\u62a5\u8b66\u3002<\/li>\n<li>\u7f13\u5b58\u547d\u4e2d\u7387\u9aa4\u964d\uff1a\u547d\u4e2d\u7387 &lt; 80% \u4e14\u4e0a\u6e38\u5e26\u5bbd\u663e\u8457\u589e\u52a0\u3002<\/li>\n<\/ul>\n<p>\u9608\u503c\u7b80\u5355\u6613\u5b9e\u73b0\uff0c\u9002\u5408\u521d\u671f\u76d1\u63a7\uff0c\u4f46\u9700\u8981\u5e73\u7a33\u7684\u57fa\u7ebf\u6570\u636e\u4e0e\u8282\u5047\u65e5\/\u6d3b\u52a8\u611f\u77e5\u3002<\/p>\n<h3>\u57fa\u4e8e\u7edf\u8ba1\u4e0e\u6a21\u578b\u7684\u68c0\u6d4b<\/h3>\n<ul>\n<li>\u79fb\u52a8\u5e73\u5747\u4e0e\u6807\u51c6\u5dee\uff08\u5982 z-score\uff09\uff1a\u68c0\u6d4b\u5f02\u5e38\u5cf0\u503c\u6216\u4e0b\u964d\u3002<\/li>\n<li>\u65f6\u5e8f\u5206\u89e3\uff08\u5b63\u8282\u6027 + \u8d8b\u52bf + \u6b8b\u5dee\uff09\uff1a\u6392\u9664\u5468\u671f\u6027\u6d41\u91cf\uff0c\u4ece\u6b8b\u5dee\u4e2d\u68c0\u6d4b\u5f02\u5e38\u3002<\/li>\n<li>\u805a\u7c7b\/\u5f02\u5e38\u68c0\u6d4b\u7b97\u6cd5\uff08Isolation Forest\u3001LOF\uff09\uff1a\u8bc6\u522b\u4e0e\u6b63\u5e38\u6a21\u5f0f\u4e0d\u540c\u7684\u8bf7\u6c42\u884c\u4e3a\uff0c\u4f8b\u5982\u5f02\u5e38\u7684 User-Agent \u6216 Referer \u5206\u5e03\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u65b9\u6cd5\u9002\u5408\u6d41\u91cf\u591a\u53d8\u6216\u5b58\u5728\u4fc3\u9500\u6d3b\u52a8\u7684\u4e1a\u52a1\uff0c\u4f46\u5bf9\u8ba1\u7b97\u8d44\u6e90\u6709\u66f4\u9ad8\u9700\u6c42\u3002<\/p>\n<h3>\u89c4\u5219\u793a\u4f8b<\/h3>\n<ul>\n<li>\u77ed\u65f6\u95f4\u5185\u540c\u4e00 IP \u8bf7\u6c42\u67d0\u9759\u6001\u8d44\u6e90 &gt; 100 \u6b21\u4e14\u8fd4\u56de\u7801\u591a\u4e3a 200\uff0c\u53ef\u5224\u5b9a\u4e3a\u722c\u866b\u6216\u7f13\u5b58\u5237\u8bf7\u6c42\u3002<\/li>\n<li>\u540c\u4e00 Referer \u6765\u6e90\uff0c\u54cd\u5e94\u4f53\u5927\u5e45\u5ea6\u53d8\u5316\u4e14\u4e0a\u6e38\u5ef6\u8fdf\u589e\u52a0\uff0c\u53ef\u80fd\u662f\u540e\u7aef\u5f02\u5e38\u6216\u7f13\u5b58\u914d\u7f6e\u5931\u6548\u3002<\/li>\n<li>POP \u8282\u70b9\u62a5\u9519\u7387\u96c6\u4e2d\u5728\u67d0\u51e0\u53f0\u8fb9\u7f18\u670d\u52a1\u5668\uff0c\u63d0\u793a\u8282\u70b9\u94fe\u8def\u6216\u914d\u7f6e\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h2>\u544a\u8b66\u7b56\u7565\u4e0e\u81ea\u52a8\u5316\u54cd\u5e94<\/h2>\n<p>\u544a\u8b66\u5e94\u5173\u6ce8\u201c\u53ca\u65f6\u6027\u3001\u51c6\u786e\u6027\u3001\u53ef\u64cd\u4f5c\u6027\u201d\u3002\u8bef\u62a5\u4e0e\u6f0f\u62a5\u90fd\u4f1a\u964d\u4f4e\u8fd0\u7ef4\u6548\u7387\u3002<\/p>\n<h3>\u544a\u8b66\u5206\u7ea7\u4e0e\u6291\u5236<\/h3>\n<ul>\n<li>\u5206\u7ea7\uff1a\u4fe1\u606f\u7ea7\u3001\u8b66\u544a\u7ea7\u3001\u4e25\u91cd\u7ea7\u3002\u4e0d\u540c\u7ea7\u522b\u901a\u77e5\u4e0d\u540c\u4eba\u5458\u53ca\u6e20\u9053\uff08Slack\/\u90ae\u4ef6\/\u77ed\u4fe1\/\u7535\u8bdd\uff09\u3002<\/li>\n<li>\u6291\u5236\uff1a\u77ed\u671f\u5185\u91cd\u590d\u544a\u8b66\u5408\u5e76\uff0c\u4f8b\u5982 1 \u5206\u949f\u5185\u76f8\u540c\u7c7b\u578b\u544a\u8b66\u53ea\u53d1\u9001\u4e00\u6b21\u3002<\/li>\n<li>\u6291\u5236\u89c4\u5219\u7ed3\u5408\u7ef4\u62a4\u7a97\u53e3\u4e0e\u53d1\u5e03\u6d41\u7a0b\uff0c\u907f\u514d\u53d1\u5e03\u65f6\u89e6\u53d1\u5927\u91cf\u544a\u8b66\u3002<\/li>\n<\/ul>\n<h3>\u81ea\u52a8\u5316\u54cd\u5e94<\/h3>\n<ul>\n<li>\u81ea\u52a8\u5316\u811a\u672c\uff1a\u5f53\u7f13\u5b58\u547d\u4e2d\u7387\u9aa4\u964d\u4e14\u4e0a\u6e38 5xx \u589e\u591a\uff0c\u89e6\u53d1\u56de\u6eda\u67d0\u6b21\u53d1\u5e03\u6216\u81ea\u52a8\u6e05\u7406\u540e\u7aef\u6545\u969c\u5b9e\u4f8b\u3002<\/li>\n<li>\u6d41\u91cf\u5207\u6362\uff1a\u9047\u5230\u533a\u57df\u6027 DDoS\uff0c\u53ef\u81ea\u52a8\u89e6\u53d1\u6d41\u91cf\u6e05\u6d17\uff08WAF\/ACL\uff09\u5e76\u5c06\u6d41\u91cf\u5207\u56de\u5907\u7528\u8282\u70b9\u3002<\/li>\n<li>Webhook \u4e0e\u544a\u8b66\u5e73\u53f0\u96c6\u6210\uff1a\u5c06\u544a\u8b66\u63a8\u9001\u5230 Grafana\u3001Prometheus Alertmanager\u3001PagerDuty \u6216\u5185\u90e8\u5de5\u5355\u7cfb\u7edf\uff0c\u5b9e\u73b0\u5feb\u901f\u54cd\u5e94\u3002<\/li>\n<\/ul>\n<h3>\u544a\u8b66\u793a\u4f8b\uff08Prometheus + Alertmanager\uff09<\/h3>\n<p>\u793a\u4f8b\u8868\u8fbe\u5f0f\uff1a<code>sum(rate(cdn_requests_total{status=~\"5..\"}[5m])) \/ sum(rate(cdn_requests_total[5m])) &gt; 0.03<\/code>\u3002\u7ed3\u5408 Alertmanager \u7684\u8def\u7531\u89c4\u5219\uff0c\u53ef\u4ee5\u5c06\u7279\u5b9a\u5730\u533a\uff08\u4f8b\u5982 Japan\u3001Korea \u6216 Singapore POP\uff09\u7684\u544a\u8b66\u8def\u7531\u5230\u76f8\u5e94\u503c\u73ed\u7ec4\u3002<\/p>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u6848\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u573a\u666f\u57fa\u4e8e\u771f\u5b9e\u8fd0\u7ef4\u7ecf\u9a8c\uff0c\u5c55\u793a\u5982\u4f55\u7528\u65e5\u5fd7+\u544a\u8b66\u5feb\u901f\u5b9a\u4f4d\u95ee\u9898\u3002<\/p>\n<h3>\u573a\u666f\u4e00\uff1a\u7f13\u5b58\u547d\u4e2d\u7387\u7a81\u964d\u5bfc\u81f4\u540e\u7aef\u538b\u529b\u9aa4\u589e<\/h3>\n<ul>\n<li>\u5206\u6790\uff1a\u901a\u8fc7\u65e5\u5fd7\u53d1\u73b0\u5927\u91cf\u300ccache-miss\u300d\u4e14\u8bf7\u6c42 URL \u5e26\u6709\u968f\u673a\u53c2\u6570\uff0c\u5bfc\u81f4\u7f13\u5b58\u88ab\u7ed5\u8fc7\u3002<\/li>\n<li>\u5904\u7406\uff1a\u914d\u7f6e CDN \u89c4\u5219\u5ffd\u7565\u7279\u5b9a\u53c2\u6570\u6216\u8bbe\u7f6e\u7f13\u5b58 key\uff0c\u4e34\u65f6\u5f00\u542f\u6d41\u91cf\u9650\u5236\u5e76\u56de\u6eda\u53d1\u5e03\u3002<\/li>\n<li>\u544a\u8b66\uff1a\u89e6\u53d1\u7f13\u5b58\u547d\u4e2d\u7387\u4e0b\u964d\u4e0e\u4e0a\u6e38\u54cd\u5e94\u65f6\u95f4\u544a\u8b66\uff0c\u81ea\u52a8\u901a\u77e5\u540e\u7aef\u4e0e CDN \u5de5\u7a0b\u5e08\u3002<\/li>\n<\/ul>\n<h3>\u573a\u666f\u4e8c\uff1a\u6a21\u62df\u722c\u866b\u5bfc\u81f4\u5e26\u5bbd\u5f02\u5e38\u589e\u957f<\/h3>\n<ul>\n<li>\u5206\u6790\uff1a\u540c\u4e00 IP\/UA \u5728\u77ed\u65f6\u95f4\u5185\u8bf7\u6c42\u5927\u91cf\u9759\u6001\u8d44\u6e90\uff0c\u4e14 Referer \u5f02\u5e38\u3002<\/li>\n<li>\u5904\u7406\uff1a\u81ea\u52a8\u4e0b\u53d1 WAF \u89c4\u5219\u6216\u5728 CDN \u4fa7\u4e34\u65f6\u5c01\u7981 IP \u6bb5\uff0c\u5e76\u5728\u65e5\u5fd7\u4e2d\u6253\u4e0a\u4e8b\u4ef6\u6807\u7b7e\u7528\u4e8e\u6eaf\u6e90\u3002<\/li>\n<\/ul>\n<h2>\u4e0d\u540c\u90e8\u7f72\u9009\u578b\u4e0e\u4f18\u52bf\u5bf9\u6bd4<\/h2>\n<p>\u5bf9\u4e8e\u7ad9\u957f\u4e0e\u4f01\u4e1a\u7528\u6237\uff0c\u9009\u62e9\u5408\u9002\u7684\u670d\u52a1\u5668\u4e0e\u90e8\u7f72\u4f4d\u7f6e\u80fd\u663e\u8457\u5f71\u54cd CDN \u4e0e\u65e5\u5fd7\u5206\u6790\u6548\u679c\u3002<\/p>\n<h3>\u4e91\u7aef\u65e5\u5fd7\u5206\u6790 vs \u672c\u5730\u90e8\u7f72<\/h3>\n<ul>\n<li>\u4e91\u7aef\uff08ELK Cloud\u3001Grafana Cloud\uff09\uff1a\u5feb\u901f\u4e0a\u624b\u3001\u5f39\u6027\u6269\u5c55\uff0c\u9002\u5408\u6ca1\u6709\u8fd0\u7ef4\u56e2\u961f\u7684\u4e2d\u5c0f\u4f01\u4e1a\u3002<\/li>\n<li>\u672c\u5730\/\u79c1\u6709\u90e8\u7f72\uff08\u81ea\u5efa 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