{"id":209975,"date":"2025-10-24T02:13:08","date_gmt":"2025-10-23T18:13:08","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209975\/"},"modified":"2025-10-24T02:13:09","modified_gmt":"2025-10-23T18:13:09","slug":"cdn-221","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209975\/","title":{"rendered":"CDN\u65e5\u5fd7\u6d1e\u5bdf\u5229\u5668\uff1a\u4e00\u952e\u5b9a\u4f4d\u5f02\u5e38\u4e0e\u6027\u80fd\u74f6\u9888"},"content":{"rendered":"<p>\u5728\u4e92\u8054\u7f51\u4e1a\u52a1\u65e5\u76ca\u589e\u957f\u7684\u4eca\u5929\uff0cCDN \u5df2\u6210\u4e3a\u63d0\u5347\u7f51\u7ad9\u53ef\u7528\u6027\u4e0e\u6027\u80fd\u7684\u5173\u952e\u7ec4\u4ef6\u3002\u5bf9\u4e8e\u7ad9\u957f\u3001\u4f01\u4e1a\u548c\u5f00\u53d1\u8005\u6765\u8bf4\uff0c<strong>CDN \u65e5\u5fd7\u4e0d\u4ec5\u662f\u95ee\u9898\u6392\u67e5\u7684\u201c\u54e8\u5175\u201d\uff0c\u66f4\u662f\u6027\u80fd\u4f18\u5316\u4e0e\u5b89\u5168\u9632\u62a4\u7684\u91cd\u8981\u4f9d\u636e<\/strong>\u3002\u672c\u6587\u5c06\u4ece\u539f\u7406\u3001\u5178\u578b\u5e94\u7528\u573a\u666f\u3001\u6280\u672f\u7ec6\u8282\u4e0e\u9009\u8d2d\u5efa\u8bae\u7b49\u89d2\u5ea6\uff0c\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u901a\u8fc7\u201cCDN \u65e5\u5fd7\u6d1e\u5bdf\u201d\u4e00\u952e\u5b9a\u4f4d\u5f02\u5e38\u4e0e\u6027\u80fd\u74f6\u9888\uff0c\u5e2e\u52a9\u4f60\u628a\u63e1\u7ad9\u70b9\u8d28\u91cf\u6307\u6807\u5e76\u5236\u5b9a\u9488\u5bf9\u6027\u6539\u8fdb\u7b56\u7565\u3002<\/p>\n<h2>\u4e3a\u4ec0\u4e48 CDN \u65e5\u5fd7\u5982\u6b64\u91cd\u8981<\/h2>\n<p>CDN \u5c06\u6d41\u91cf\u5206\u53d1\u5230\u8fb9\u7f18\u8282\u70b9\uff0c\u65e5\u5fd7\u8bb0\u5f55\u4e86\u4ece\u8bf7\u6c42\u5230\u54cd\u5e94\u7684\u5168\u8fc7\u7a0b\u3002\u901a\u8fc7\u89e3\u6790\u8fd9\u4e9b\u65e5\u5fd7\uff0c\u80fd\u591f\u83b7\u5f97\u8bf8\u5982\u8bbf\u95ee\u5206\u5e03\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u56de\u6e90\u5ef6\u8fdf\u3001TLS \u63e1\u624b\u65f6\u95f4\u3001\u9519\u8bef\u7801\u5206\u5e03\u3001\u5e26\u5bbd\u5cf0\u503c\u53ca\u6f5c\u5728\u653b\u51fb\u884c\u4e3a\uff08\u5982 DDoS\u3001\u722c\u866b\u5f02\u5e38\uff09\u7684\u5168\u9762\u89c6\u89d2\u3002\u5bf9\u4e8e\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u6d77\u5916\u670d\u52a1\u5668\u7684\u7ad9\u70b9\uff0c\u8fb9\u7f18\u8282\u70b9\u5730\u57df\u5dee\u5f02\u76f4\u63a5\u53cd\u6620\u5728\u65e5\u5fd7\u4e2d\uff0c\u56e0\u6b64\u65e5\u5fd7\u5206\u6790\u6709\u52a9\u4e8e\u8bc6\u522b\u5730\u57df\u6027\u6027\u80fd\u95ee\u9898\uff08\u4f8b\u5982\u9999\u6e2fVPS \u5bf9\u9999\u6e2f\u7528\u6237\u8868\u73b0\u4f18\u4e8e\u8fdc\u7aef\u8282\u70b9\uff09\u3002<\/p>\n<h2>CDN \u65e5\u5fd7\u7684\u57fa\u672c\u7ec4\u6210\u4e0e\u5173\u952e\u5b57\u6bb5<\/h2>\n<p>\u5178\u578b CDN \u65e5\u5fd7\u683c\u5f0f\uff08\u5982 Common Log Format \u6216\u81ea\u5b9a\u4e49 JSON\uff09\u5305\u542b\u4ee5\u4e0b\u6838\u5fc3\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li>timestamp\uff1a\u8bf7\u6c42\u65f6\u95f4\u6233\uff0c\u7528\u4e8e\u65f6\u5e8f\u5206\u6790\u4e0e\u540c\u6b65\u3002<\/li>\n<li>client_ip \/ x-forwarded-for\uff1a\u771f\u5b9e\u5ba2\u6237\u7aef IP\uff0c\u7528\u4e8e\u6e90\u5934\u5b9a\u4f4d\u548c\u5730\u7406\u5206\u5e03\u7edf\u8ba1\u3002<\/li>\n<li>edge_node\uff1a\u8fb9\u7f18\u8282\u70b9\u6807\u8bc6\uff0c\u5e2e\u52a9\u5b9a\u4f4d\u8282\u70b9\u7ea7\u522b\u95ee\u9898\uff08\u5982\u67d0\u8282\u70b9\u7f13\u5b58\u5931\u6548\u6216\u7f51\u7edc\u6296\u52a8\uff09\u3002<\/li>\n<li>request_method \/ url \/ http_version\uff1a\u8bf7\u6c42\u4fe1\u606f\uff0c\u7528\u4e8e\u91cd\u653e\u6216\u56de\u6eaf\u95ee\u9898\u3002<\/li>\n<li>status_code \/ upstream_status\uff1aHTTP \u72b6\u6001\u7801\u53ca\u56de\u6e90\u72b6\u6001\u3002<\/li>\n<li>cache_status\uff08HIT\/MISS\/EXPIRED\uff09\uff1a\u7f13\u5b58\u547d\u4e2d\u7387\u5173\u952e\u6307\u6807\u3002<\/li>\n<li>bytes_sent\uff1a\u54cd\u5e94\u5927\u5c0f\uff0c\u7ed3\u5408\u5e26\u5bbd\u53ef\u5206\u6790\u6d41\u91cf\u5f02\u5e38\u3002<\/li>\n<li>ttfb \/ total_time\uff1a\u9996\u5b57\u8282\u65f6\u95f4\u4e0e\u603b\u54cd\u5e94\u65f6\u95f4\uff0c\u7528\u4e8e\u6027\u80fd\u74f6\u9888\u5b9a\u4f4d\u3002<\/li>\n<li>tls_handshake_time \/ protocol\uff1aTLS \u4e0e\u534f\u8bae\uff08HTTP\/1.1, HTTP\/2, QUIC\uff09\u7684\u6307\u6807\u3002<\/li>\n<li>referer \/ user_agent\uff1a\u6d41\u91cf\u6765\u6e90\u4e0e\u5ba2\u6237\u7aef\u7c7b\u578b\uff0c\u8f85\u52a9\u5f02\u5e38\u6d41\u91cf\u8bc6\u522b\u3002<\/li>\n<\/ul>\n<h3>\u65e5\u5fd7\u4f20\u8f93\u4e0e\u91c7\u96c6\u94fe\u8def<\/h3>\n<p>\u65e5\u5fd7\u4ece\u8fb9\u7f18\u8282\u70b9\u5bfc\u51fa\u5230\u5b58\u50a8\u4e0e\u5206\u6790\u5e73\u53f0\u901a\u5e38\u6709\u51e0\u79cd\u65b9\u5f0f\uff1a<\/p>\n<ul>\n<li>\u6279\u91cf\u6587\u4ef6\u5bfc\u51fa\uff08\u6bcf\u5929\/\u5c0f\u65f6\uff09\u5e76\u4e0a\u4f20\u81f3\u5bf9\u8c61\u5b58\u50a8\uff08\u5982 S3\uff09\uff0c\u9002\u5408\u79bb\u7ebf\u5206\u6790\u4e0e\u5f52\u6863\u3002<\/li>\n<li>\u5b9e\u65f6\u6d41\u5f0f\u4f20\u8f93\uff08Kafka \/ Fluentd \/ Logstash \/ Filebeat\uff09\u81f3\u65e5\u5fd7\u805a\u5408\u5e73\u53f0\uff0c\u9002\u5408\u5728\u7ebf\u76d1\u63a7\u4e0e\u544a\u8b66\u3002<\/li>\n<li>\u76f4\u5199\u5230\u5206\u6790\u6570\u636e\u5e93\uff08ClickHouse \/ BigQuery \/ Elasticsearch\uff09\u4ee5\u4fbf\u8fdb\u884c\u9ad8\u6027\u80fd OLAP \u67e5\u8be2\u3002<\/li>\n<\/ul>\n<h2>\u4e00\u952e\u5b9a\u4f4d\u5f02\u5e38\uff1a\u4ece\u6307\u6807\u5230\u6839\u56e0\u7684\u6280\u672f\u6d41\u7a0b<\/h2>\n<p>\u5c06\u6d77\u91cf\u65e5\u5fd7\u8f6c\u4e3a\u53ef\u64cd\u4f5c\u7684\u6d1e\u5bdf\uff0c\u4e00\u822c\u9075\u5faa\u4ee5\u4e0b\u6d41\u7a0b\uff1a<\/p>\n<ul>\n<li>ETL\uff1a\u6e05\u6d17\uff08\u53bb\u91cd\u3001\u8865\u5168\u7f3a\u5931\u5b57\u6bb5\uff09\u3001\u89e3\u6790\uff08JSON\u3001CSV\u3001\u6b63\u5219\u63d0\u53d6\uff09\u3001\u683c\u5f0f\u5316\u65f6\u95f4\u5e76\u5199\u5165\u7edf\u4e00 schema\u3002<\/li>\n<li>\u5efa\u6a21\uff1a\u5b9a\u4e49\u5173\u952e\u6307\u6807\uff08PV\u3001QPS\u3001\u5e26\u5bbd\u3001\u7f13\u5b58\u547d\u4e2d\u7387\u3001\u9519\u8bef\u7387\u3001P95\/P99 \u54cd\u5e94\u65f6\u95f4\u3001\u56de\u6e90\u5ef6\u8fdf\uff09\u5e76\u751f\u6210\u65f6\u95f4\u5e8f\u5217\u3002<\/li>\n<li>\u5f02\u5e38\u68c0\u6d4b\uff1a\u57fa\u4e8e\u9608\u503c\u3001\u7edf\u8ba1\u5b66\uff08z-score\uff09\u6216\u673a\u5668\u5b66\u4e60\uff08\u5b64\u7acb\u68ee\u6797\u3001\u5b63\u8282\u6027\u5206\u89e3\uff09\u81ea\u52a8\u8bc6\u522b\u7a81\u53d8\u3002<\/li>\n<li>\u5173\u8054\u5206\u6790\uff1a\u901a\u8fc7 join \u8fb9\u7f18\u8282\u70b9\u3001\u57df\u540d\u3001URI\u3001\u5ba2\u6237\u5730\u57df\u4e0e\u7528\u6237\u4ee3\u7406\uff0c\u5feb\u901f\u7f29\u5c0f\u6392\u67e5\u8303\u56f4\u3002<\/li>\n<li>\u6839\u56e0\u5b9a\u4f4d\uff1a\u7ed3\u5408\u8fb9\u7f18\u8282\u70b9\u65e5\u5fd7\u3001\u56de\u6e90\u65e5\u5fd7\u3001\u7f51\u7edc\u76d1\u63a7\uff08Traceroute\u3001BGP\uff09\u4e0e\u5e94\u7528\u65e5\u5fd7\uff0c\u786e\u8ba4\u662f\u7f13\u5b58\u7b56\u7565\u3001\u56de\u6e90\u6027\u80fd\u3001TLS \u95ee\u9898\u6216\u7f51\u7edc\u94fe\u8def\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>\u793a\u4f8b\uff1a\u5feb\u901f\u67e5\u627e\u7f13\u5b58\u547d\u4e2d\u7387\u4e0b\u964d\u7684\u6839\u56e0<\/h3>\n<p>\u6b65\u9aa4\u793a\u4f8b\uff1a<\/p>\n<ul>\n<li>\u5728\u7edf\u4e00\u5206\u6790\u5e73\u53f0\u67e5\u8be2\u67d0\u5c0f\u65f6\u5185 cache_status=MISS \u7684\u6bd4\u4f8b\u53d8\u5316\uff08SQL \u6216 ClickHouse \u67e5\u8be2\uff09\u3002<\/li>\n<li>\u6309 URI \u524d\u7f00\u805a\u5408\uff0c\u627e\u51fa\u547d\u4e2d\u7387\u4e0b\u964d\u6700\u660e\u663e\u7684\u8d44\u6e90\u96c6\u5408\u3002<\/li>\n<li>\u68c0\u67e5\u8fd9\u4e9b\u8d44\u6e90\u662f\u5426\u88ab\u8bbe\u7f6e\u4e86\u77ed TTL\u3001\u9891\u7e41\u53d8\u66f4\u6216\u5e26\u6709 query string\uff08\u5bfc\u81f4\u65e0\u6cd5\u7f13\u5b58\uff09\u3002<\/li>\n<li>\u82e5\u53d1\u73b0\u662f\u56de\u6e90\u54cd\u5e94 Cache-Control \u5bfc\u81f4\u56de\u6e90\u9891\u7e41\uff0c\u53ef\u5728 CDN \u914d\u7f6e\u4e2d\u589e\u52a0\u81ea\u5b9a\u4e49\u7f13\u5b58\u89c4\u5219\u6216\u542f\u7528\u7f13\u5b58\u952e\u5ffd\u7565\u53c2\u6570\u3002<\/li>\n<\/ul>\n<h2>\u6027\u80fd\u74f6\u9888\u5b9a\u4f4d\u7684\u5b9e\u7528\u6307\u6807\u4e0e\u67e5\u8be2\u793a\u4f8b<\/h2>\n<p>\u5b9a\u4f4d\u6027\u80fd\u74f6\u9888\u65f6\uff0c\u4ee5\u4e0b\u6307\u6807\u5c24\u4e3a\u91cd\u8981\uff1a<\/p>\n<ul>\n<li>TTL \u4e0e\u7f13\u5b58\u547d\u4e2d\u7387\uff08cache_hit_ratio\uff09<\/li>\n<li>\u56de\u6e90\u5ef6\u8fdf\uff08upstream_latency \/ origin_time\uff09\u4e0e P95\/P99 \u54cd\u5e94\u65f6\u95f4<\/li>\n<li>TLS \u63e1\u624b\u65f6\u95f4\u4e0e\u8bc1\u4e66\u94fe\u95ee\u9898\uff08\u5f71\u54cd\u9996\u6b21\u767b\u9646\u5ef6\u8fdf\uff09<\/li>\n<li>\u534f\u8bae\u5206\u5e03\uff08HTTP\/1.1 vs HTTP\/2 vs QUIC\uff09\u5bf9\u5e76\u53d1\u4e0e\u5e26\u5bbd\u5229\u7528\u7684\u5f71\u54cd<\/li>\n<li>\u8fb9\u7f18\u8282\u70b9\u5730\u57df\u5206\u5e03\u4e0e\u7f51\u7edc\u5ef6\u8fdf\uff08\u9999\u6e2f\u3001\u65e5\u672c\u3001\u97e9\u56fd\u3001\u65b0\u52a0\u5761\u7b49\u5730\u533a\u7684\u5ef6\u8fdf\u5dee\u5f02\uff09<\/li>\n<\/ul>\n<p>\u793a\u4f8b ClickHouse \u67e5\u8be2\uff08\u4f2a\u4ee3\u7801\uff09\u53ef\u7528\u4e8e\u8ba1\u7b97 P95 \u54cd\u5e94\u65f6\u95f4\uff1a<\/p>\n<p><code>SELECT quantile(0.95)(total_time) FROM cdn_logs WHERE timestamp BETWEEN ... AND edge_node='hk-edge-1';<\/code><\/p>\n<h2>\u5e94\u7528\u573a\u666f\uff1a\u4ece\u8fd0\u8425\u76d1\u63a7\u5230\u5b89\u5168\u9632\u62a4<\/h2>\n<p>CDN \u65e5\u5fd7\u6d1e\u5bdf\u9002\u7528\u591a\u79cd\u573a\u666f\uff1a<\/p>\n<ul>\n<li>\u5bb9\u91cf\u89c4\u5212\uff1a\u901a\u8fc7\u65f6\u5e8f\u5e26\u5bbd\u4e0e QPS \u8d8b\u52bf\u9884\u6d4b\u70ed\u70b9\u6d3b\u52a8\u671f\u95f4\u9700\u8981\u7684\u5e26\u5bbd\u6216\u8fb9\u7f18\u6269\u5bb9\u3002<\/li>\n<li>\u6027\u80fd\u4f18\u5316\uff1a\u8bc6\u522b\u6162\u8d44\u6e90\u5e76\u4f18\u5316\u7f13\u5b58\u7b56\u7565\u3001\u538b\u7f29\u6216\u542f\u7528 HTTP\/2\/QUIC\u3002<\/li>\n<li>\u56de\u6e90\u7a33\u5b9a\u6027\uff1a\u68c0\u6d4b origin \u670d\u52a1\u5668\uff08\u53ef\u4e3a\u9999\u6e2f\u670d\u52a1\u5668\u6216\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u662f\u5426\u6210\u4e3a\u74f6\u9888\uff0c\u7ed3\u5408\u5e94\u7528\u65e5\u5fd7\u8c03\u4f18\u6570\u636e\u5e93\u6216\u540e\u7aef\u5fae\u670d\u52a1\u3002<\/li>\n<li>\u5730\u57df\u4f53\u9a8c\u4f18\u5316\uff1a\u901a\u8fc7\u5bf9\u6bd4\u9999\u6e2fVPS\u3001\u65e5\u672c\u670d\u52a1\u5668\u3001\u97e9\u56fd\u670d\u52a1\u5668\u548c\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7684\u5ef6\u8fdf\u4e0e\u547d\u4e2d\u7387\uff0c\u51b3\u5b9a\u54ea\u4e9b\u5730\u533a\u9700\u8981\u65b0\u589e\u8282\u70b9\u6216\u8c03\u6574\u7ebf\u8def\u3002<\/li>\n<li>\u5b89\u5168\u4e8b\u4ef6\u54cd\u5e94\uff1a\u5728\u5f02\u5e38\u6d41\u91cf\uff08\u9ad8\u9519\u8bef\u7387\u3001\u5f02\u5e38 UA\u3001\u8bf7\u6c42\u6d2a\u6cdb\uff09\u65f6\u5feb\u901f\u5b9a\u4f4d\u653b\u51fb\u6765\u6e90\u5e76\u89e6\u53d1 WAF \u89c4\u5219\u6216\u9650\u6d41\u3002<\/li>\n<\/ul>\n<h2>\u5de5\u5177\u4e0e\u5b9e\u73b0\u63a8\u8350<\/h2>\n<p>\u6839\u636e\u5b9e\u65f6\u6027\u548c\u6210\u672c\uff0c\u53ef\u4ee5\u9009\u62e9\u4e0d\u540c\u6808\uff1a<\/p>\n<ul>\n<li>\u5b9e\u65f6\u4e0e\u544a\u8b66\uff1aPrometheus + Grafana\uff08\u914d\u5408 Filebeat\/Fluentd \u63a8\u9001\u76d1\u63a7\u6307\u6807\uff09\u9002\u5408\u5feb\u901f\u544a\u8b66\u4e0e\u4eea\u8868\u76d8\u5c55\u793a\u3002<\/li>\n<li>\u5927\u6570\u636e OLAP\uff1aClickHouse \u6216 BigQuery \u652f\u6301\u6d77\u91cf\u65e5\u5fd7\u7684\u4f4e\u5ef6\u8fdf\u5206\u6790\u4e0e\u590d\u6742\u805a\u5408\u3002<\/li>\n<li>\u5168\u6587\u68c0\u7d22\u4e0e\u65e5\u5fd7\u5173\u8054\uff1aElasticsearch + Kibana \u5bf9\u6392\u67e5\u4e2a\u6848\uff08\u5982\u9519\u8bef\u8bf7\u6c42\u56de\u6eaf\uff09\u975e\u5e38\u65b9\u4fbf\u3002<\/li>\n<li>\u5b89\u5168\u5206\u6790\uff1a\u4f7f\u7528 SIEM\uff08\u5982 Wazuh\u3001Splunk\uff09\u7ed3\u5408 CDN 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