{"id":209731,"date":"2025-10-23T21:25:59","date_gmt":"2025-10-23T13:25:59","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209731\/"},"modified":"2025-10-23T21:26:00","modified_gmt":"2025-10-23T13:26:00","slug":"cdn-108","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209731\/","title":{"rendered":"CDN 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\u7684\u884c\u4e3a\u5206\u6790\uff08\u5f02\u5e38\u5ba2\u6237\u7aef\u6307\u7eb9\u3001\u8bf7\u6c42\u8def\u5f84\u5f02\u5e38\u7b49\uff09\u3002<\/li>\n<li><strong>\u544a\u8b66\u4e0e\u54cd\u5e94<\/strong>\uff1a\u5f53\u68c0\u6d4b\u5230\u5a01\u80c1\u6216\u5f02\u5e38\u65f6\uff0c\u6309\u7167\u4f18\u5148\u7ea7\u89e6\u53d1\u544a\u8b66\uff0c\u5e76\u7ed3\u5408\u81ea\u52a8\u5316\u89c4\u5219\uff08\u5982\u5c01\u7981 IP\u3001\u8c03\u6574\u7f13\u5b58\u7b56\u7565\u3001\u5207\u6362\u56de\u6e90\uff09\u6216\u4eba\u5de5\u54cd\u5e94\u6d41\u7a0b\uff08\u901a\u77e5\u8fd0\u8425\u3001\u5b89\u5168\u56e2\u961f\uff09\u3002<\/li>\n<\/ul>\n<h3>\u5173\u952e\u76d1\u63a7\u7ef4\u5ea6<\/h3>\n<ul>\n<li>\u6d41\u91cf\u7c7b\uff1a\u5e26\u5bbd\uff08bps\uff09\u3001\u8bf7\u6c42\u901f\u7387\uff08RPS\/QPS\uff09\u3001\u5cf0\u503c\u5e76\u53d1\u8fde\u63a5\u6570\u3002<\/li>\n<li>\u6027\u80fd\u7c7b\uff1a\u8fb9\u7f18\u54cd\u5e94\u65f6\u95f4\uff08p50\/p95\/p99\uff09\u3001\u56de\u6e90\u65f6\u5ef6\u4e0e\u56de\u6e90\u9519\u8bef\u7387\uff085xx\uff09\u3002<\/li>\n<li>\u9519\u8bef\u4e0e\u5b89\u5168\u7c7b\uff1aHTTP 4xx\/5xx \u5206\u5e03\u3001WAF \u547d\u4e2d\u7387\u3001\u5f02\u5e38 User-Agent\u3001URI\/Query \u53c2\u6570\u4e2d\u7684\u6ce8\u5165\u7279\u5f81\u3001\u5f02\u5e38\u722c\u866b\u884c\u4e3a\u3002<\/li>\n<li>\u884c\u4e3a\u7c7b\uff1a\u540c\u4e00 IP\/UA \u7684\u8bf7\u6c42\u9891\u6b21\u3001\u5730\u7406\u4f4d\u7f6e\u5206\u5e03\uff08\u7528\u4e8e\u8bc6\u522b DDoS \u6216\u722c\u866b\uff09\u3001cookie\/\u4f1a\u8bdd\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<h2>\u5178\u578b\u5e94\u7528\u573a\u666f\u4e0e\u5b9e\u6218\u7b56\u7565<\/h2>\n<p>\u4e0b\u9762\u5217\u4e3e\u51e0\u7c7b\u5e38\u89c1\u573a\u666f\uff0c\u5e76\u7ed9\u51fa\u53ef\u843d\u5730\u7684\u76d1\u63a7\u4e0e\u544a\u8b66\u7b56\u7565\u3002<\/p>\n<h3>1. \u5927\u89c4\u6a21\u6d41\u91cf\u7a81\u589e\uff08\u7591\u4f3c DDoS\uff09<\/h3>\n<ul>\n<li>\u76d1\u63a7\u6307\u6807\uff1a\u5e26\u5bbd\u6025\u589e\u3001\u6e90\u81ea\u5355\u4e00\u6216\u5c11\u6570 ASN \u7684\u9ad8\u5e76\u53d1\u8fde\u63a5\u3001\u9519\u8bef\u7387\u4e0b\u964d\uff08\u56e0\u4e3a\u8fb9\u7f18\u76f4\u63a5\u4e22\u5305\uff09\u6216\u56de\u6e90 5xx \u589e\u52a0\u3002<\/li>\n<li>\u544a\u8b66\u89c4\u5219\u4e3e\u4f8b\uff1a\u5f53 1 \u5206\u949f\u5185\u5e26\u5bbd\u589e\u957f &gt; 3 \u500d\u4e14\u5e76\u53d1\u8fde\u63a5 &gt; \u9608\u503c\uff08\u4f8b\u5982\u5e73\u5747\u503c + 5\u03c3\uff09\u65f6\u89e6\u53d1 P0 \u544a\u8b66\u3002<\/li>\n<li>\u54cd\u5e94\u52a8\u4f5c\uff1a\u542f\u7528\u901f\u7387\u9650\u5236\uff08rate-limiting\uff09\u3001\u4e34\u65f6\u5c01\u7981\u6076\u610f IP \u6bb5\u3001\u542f\u7528 CDN \u5168\u7403\u7194\u65ad\/\u56de\u6e90\u6d41\u91cf\u5207\u6362\u3001\u4e0e ISP \u534f\u540c\u6e05\u6d17\u6216\u542f\u7528\u4e91\u7aef DDoS \u6e05\u6d17\u670d\u52a1\u3002<\/li>\n<\/ul>\n<h3>2. \u5e94\u7528\u5c42\u653b\u51fb\uff08SQL \u6ce8\u5165\u3001XSS\u3001\u722c\u866b\u722c\u53d6\u654f\u611f\u6570\u636e\uff09<\/h3>\n<ul>\n<li>\u76d1\u63a7\u6307\u6807\uff1aWAF \u547d\u4e2d\u89c4\u5219\u6570\u3001\u5e26\u6709 SQL\/XSS \u7b7e\u540d\u7684\u8bf7\u6c42\u6bd4\u4f8b\u3001\u540c\u4e00 IP \u4e0b\u5927\u91cf\u654f\u611f\u8def\u5f84\u8bf7\u6c42\uff08\/login\u3001\/admin\uff09\u3002<\/li>\n<li>\u544a\u8b66\u89c4\u5219\u4e3e\u4f8b\uff1a\u5f53\u67d0\u6761 WAF \u89c4\u5219 5 \u5206\u949f\u5185\u547d\u4e2d\u6b21\u6570 &gt; 50 \u4e14\u540c\u65f6\u8bf7\u6c42\u6765\u6e90\u96c6\u4e2d\u4e8e\u672a\u88ab\u7f13\u5b58\u7684 URI \u65f6\u89e6\u53d1\u4e2d\u9ad8\u4f18\u5148\u7ea7\u544a\u8b66\u3002<\/li>\n<li>\u54cd\u5e94\u52a8\u4f5c\uff1a\u4e34\u65f6\u963b\u65ad IP\u3001\u5bf9\u5f02\u5e38 URI \u6dfb\u52a0\u66f4\u4e25\u683c\u7684\u7f13\u5b58\u6216\u9274\u6743\u7b56\u7565\u3001\u589e\u52a0\u9a8c\u8bc1\u7801\u6216\u4e8c\u6b21\u8ba4\u8bc1\u3001\u5ba1\u8ba1\u56de\u6e90\u65e5\u5fd7\u5e76\u4fee\u590d\u540e\u7aef\u6f0f\u6d1e\u3002<\/li>\n<\/ul>\n<h3>3. \u56de\u6e90\u6545\u969c\u4e0e\u7f13\u5b58\u51fb\u7a7f<\/h3>\n<ul>\n<li>\u76d1\u63a7\u6307\u6807\uff1a\u56de\u6e90 5xx \u7387\u3001\u56de\u6e90\u54cd\u5e94\u65f6\u5ef6\u98d9\u5347\u3001\u8fb9\u7f18\u7f13\u5b58\u672a\u547d\u4e2d\u7387\u6fc0\u589e\uff08cache-miss ratio\uff09\u3002<\/li>\n<li>\u544a\u8b66\u89c4\u5219\u4e3e\u4f8b\uff1a\u5f53\u56de\u6e90 5xx \u6bd4\u4f8b &gt; 2% \u6216 cache-miss \u5728\u8fde\u7eed 3 \u4e2a\u91c7\u6837\u5468\u671f\u5185\u7ffb\u500d\u65f6\u89e6\u53d1\u544a\u8b66\u3002<\/li>\n<li>\u54cd\u5e94\u52a8\u4f5c\uff1a\u542f\u52a8\u56de\u6e90\u5065\u5eb7\u68c0\u67e5\u3001\u4e34\u65f6\u6269\u5927\u7f13\u5b58 TTL\uff08\u4fdd\u62a4\u540e\u7aef\uff09\u3001\u5728\u4f4e\u98ce\u9669\u8d44\u6e90\u4e0a\u542f\u7528 stale-while-revalidate \u6216 502\/504 \u9519\u8bef\u66ff\u4ee3\u9875\u9762\u3002<\/li>\n<\/ul>\n<h2>\u76d1\u63a7\u5e73\u53f0\u4e0e\u6280\u672f\u5b9e\u73b0\u5efa\u8bae<\/h2>\n<p>\u6784\u5efa\u4e00\u4e2a\u53ef\u6269\u5c55\u7684\u76d1\u63a7\u4e0e\u544a\u8b66\u4f53\u7cfb\uff0c\u65e2\u8981\u8003\u8651\u5b9e\u65f6\u6027\uff0c\u4e5f\u8981\u517c\u987e\u6210\u672c\u4e0e\u53ef\u64cd\u4f5c\u6027\u3002\u5e38\u89c1\u65b9\u6848\u5982\u4e0b\uff1a<\/p>\n<h3>\u65e5\u5fd7\u4e0e\u6307\u6807\u91c7\u96c6<\/h3>\n<ul>\n<li>\u8fb9\u7f18\u65e5\u5fd7\uff1a\u5982\u679c\u4f7f\u7528 CDN \u670d\u52a1\u5546\uff0c\u786e\u4fdd\u80fd\u5bfc\u51fa\u5b9e\u65f6\u8bbf\u95ee\u65e5\u5fd7\uff08\u4f8b\u5982\u901a\u8fc7\u65e5\u5fd7\u6d41\u5230 Kafka\/S3\uff09\u3002<\/li>\n<li>\u96c6\u4e2d\u65e5\u5fd7\u6536\u96c6\uff1a\u4f7f\u7528 Fluentd\/Logstash \u5c06\u65e5\u5fd7\u9001\u5165 ELK\uff08Elasticsearch\u3001Logstash\u3001Kibana\uff09\u6216 OpenSearch\uff0c\u7528\u4e8e\u641c\u7d22\u4e0e\u4e8b\u540e\u6eaf\u6e90\u3002<\/li>\n<li>\u6307\u6807\u91c7\u96c6\uff1aPrometheus \u6293\u53d6 CDN\/\u56de\u6e90\u7684 metrics\uff08\u5982\u679c CDN \u652f\u6301 Prometheus \u683c\u5f0f\u5bfc\u51fa\uff09\uff0c\u6216\u901a\u8fc7 StatsD\/Telegraf \u6c47\u603b\u5230 InfluxDB\u3001Grafana \u5c55\u793a\u3002<\/li>\n<\/ul>\n<h3>\u5b9e\u65f6\u544a\u8b66\u4e0e\u81ea\u52a8\u5316\u54cd\u5e94<\/h3>\n<ul>\n<li>\u544a\u8b66\u5f15\u64ce\uff1a\u4f7f\u7528 Alertmanager\uff08Prometheus \u751f\u6001\uff09\u6216 Grafana Alerting\uff0c\u4ee5\u53ca\u4f01\u4e1a\u7ea7\u7684 PagerDuty\u3001OpsGenie \u8fdb\u884c\u5206\u7ea7\u901a\u77e5\u4e0e\u503c\u73ed\u8c03\u5ea6\u3002<\/li>\n<li>\u81ea\u52a8\u5316\u6267\u884c\uff1a\u7ed3\u5408\u811a\u672c\u6216 Runbook \u901a\u8fc7 CDN API \u6267\u884c\u5c01\u7981\u3001\u89c4\u5219\u4e0b\u53d1\u3001\u7f13\u5b58\u5237\u65b0\u7b49\u64cd\u4f5c\u3002\u5efa\u8bae\u901a\u8fc7\u53d7\u63a7\u7684 API Key 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