{"id":209971,"date":"2025-10-24T02:10:03","date_gmt":"2025-10-23T18:10:03","guid":{"rendered":"https:\/\/www.server.hk\/blog\/209971\/"},"modified":"2025-10-24T02:10:04","modified_gmt":"2025-10-23T18:10:04","slug":"cdn-219","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/209971\/","title":{"rendered":"CDN\u8282\u70b9\u81ea\u6108\u5b9e\u6218\uff1a\u81ea\u52a8\u6062\u590d\u7b56\u7565\u4e0e\u96f6\u4e2d\u65ad\u4fdd\u969c"},"content":{"rendered":"<p>\u5728\u5168\u7403\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff08CDN\uff09\u67b6\u6784\u4e2d\uff0c\u8282\u70b9\u6545\u969c\u4e0d\u53ef\u907f\u514d\uff1a\u7f51\u7edc\u6296\u52a8\u3001\u786c\u4ef6\u6545\u969c\u3001\u8f6f\u4ef6\u5185\u5b58\u6cc4\u6f0f\u3001DDOS \u653b\u51fb\u3001\u6570\u636e\u4e2d\u5fc3\u7ef4\u62a4\u7b49\u90fd\u53ef\u80fd\u5bfc\u81f4\u8282\u70b9\u5931\u6548\u3002\u5bf9\u4e8e\u9762\u5411\u5168\u7403\u7684\u7ad9\u70b9\u548c\u5e94\u7528\uff08\u5c24\u5176\u4f9d\u8d56\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u6216\u65e5\u672c\u670d\u52a1\u5668\u7b49\u6d77\u5916\u670d\u52a1\u5668\u8282\u70b9\u7684\u670d\u52a1\uff09\uff0c\u5982\u4f55\u5b9e\u73b0\u81ea\u52a8\u5316\u7684\u8282\u70b9\u81ea\u6108\u4e0e\u201c\u96f6\u4e2d\u65ad\u201d\u4f53\u9a8c\uff0c\u662f\u8fd0\u7ef4\u4e0e\u67b6\u6784\u56e2\u961f\u5fc5\u987b\u89e3\u51b3\u7684\u5173\u952e\u95ee\u9898\u3002\u672c\u6587\u4ece\u539f\u7406\u3001\u5b9e\u6218\u7b56\u7565\u3001\u5e94\u7528\u573a\u666f\u3001\u4f18\u52bf\u5bf9\u6bd4\u53ca\u9009\u8d2d\u5efa\u8bae\u7b49\u65b9\u9762\uff0c\u8be6\u7ec6\u9610\u8ff0 CDN \u8282\u70b9\u81ea\u6108\u7684\u5b9e\u73b0\u65b9\u6cd5\uff0c\u9762\u5411\u7ad9\u957f\u3001\u4f01\u4e1a\u7528\u6237\u4e0e\u5f00\u53d1\u8005\uff0c\u63d0\u4f9b\u53ef\u843d\u5730\u7684\u6280\u672f\u7ec6\u8282\u4e0e\u5b9e\u8df5\u5efa\u8bae\u3002<\/p>\n<h2>CDN \u8282\u70b9\u81ea\u6108\u7684\u57fa\u672c\u539f\u7406<\/h2>\n<p>CDN \u8282\u70b9\u81ea\u6108\uff08Self-Healing\uff09\u662f\u6307\u5728\u8282\u70b9\u53d1\u751f\u6545\u969c\u6216\u6027\u80fd\u9000\u5316\u65f6\uff0c\u7cfb\u7edf\u80fd\u81ea\u52a8\u5316\u68c0\u6d4b\u3001\u9694\u79bb\u3001\u4fee\u590d\u6216\u66ff\u6362\u6545\u969c\u8282\u70b9\uff0c\u4ece\u800c\u786e\u4fdd\u6d41\u91cf\u8fde\u7eed\u6027\u4e0e\u670d\u52a1\u53ef\u7528\u6027\u3002\u5176\u6838\u5fc3\u53ef\u5206\u4e3a\u4e09\u5c42\uff1a<\/p>\n<ul>\n<li><strong>\u76d1\u6d4b\u5c42<\/strong>\uff1a\u5b9e\u65f6\u91c7\u96c6\u8282\u70b9\u5065\u5eb7\u6570\u636e\uff0c\u5305\u62ec\u7f51\u7edc\u5ef6\u8fdf\u3001\u4e22\u5305\u7387\u3001\u54cd\u5e94\u65f6\u95f4\u3001\u9519\u8bef\u7387\u3001\u5e26\u5bbd\u5360\u7528\u3001\u7cfb\u7edf\u8d1f\u8f7d\u3001\u78c1\u76d8\/\u5185\u5b58\u4f7f\u7528\u7b49\u3002<\/li>\n<li><strong>\u51b3\u7b56\u5c42<\/strong>\uff1a\u57fa\u4e8e\u89c4\u5219\u5f15\u64ce\u6216 ML \u6a21\u578b\u5224\u65ad\u8282\u70b9\u662f\u5426\u8fdb\u5165\u5f02\u5e38\u72b6\u6001\uff0c\u5e76\u51b3\u5b9a\u91c7\u53d6\u4f55\u79cd\u7b56\u7565\uff08\u964d\u8f7d\u3001\u9694\u79bb\u3001\u56de\u6eda\u3001\u91cd\u5efa\uff09\u3002<\/li>\n<li><strong>\u6267\u884c\u5c42<\/strong>\uff1a\u901a\u8fc7\u81ea\u52a8\u5316\u5de5\u5177\uff08\u811a\u672c\u3001Orchestration\u3001\u5bb9\u5668\u7f16\u6392\u3001SDN API\uff09\u6267\u884c\u4fee\u590d\u64cd\u4f5c\uff0c\u4f8b\u5982\u91cd\u542f\u670d\u52a1\u3001\u56de\u6eda\u914d\u7f6e\u3001\u5207\u6362\u6d41\u91cf\u3001\u91cd\u65b0\u90e8\u7f72\u6216\u66ff\u6362\u8282\u70b9\u3002<\/li>\n<\/ul>\n<p>\u5728\u5b9e\u9645\u5de5\u7a0b\u4e2d\uff0c\u8fd9\u4e09\u5c42\u9700\u8981\u4e0e\u5168\u5c40\u6d41\u91cf\u8c03\u5ea6\uff08GSLB\/Anycast\uff09\u3001\u8fb9\u7f18\u7f13\u5b58\u7b56\u7565\u3001\u6e90\u7ad9\u5bb9\u707e\u7b56\u7565\u8054\u52a8\uff0c\u624d\u80fd\u505a\u5230\u771f\u6b63\u7684\u96f6\u4e2d\u65ad\u4f53\u9a8c\u3002<\/p>\n<h3>\u76d1\u6d4b\u5c42\u7684\u5b9e\u73b0\u7ec6\u8282<\/h3>\n<p>\u76d1\u6d4b\u4e0d\u4ec5\u4f9d\u8d56\u4e8e\u88ab\u52a8\u6307\u6807\uff08\u5982 5xx \u9519\u8bef\u7387\uff09\uff0c\u8fd8\u9700\u8981\u4e3b\u52a8\u63a2\u6d4b\uff08\u4e3b\u52a8\u5fc3\u8df3\u3001\u5408\u6210\u76d1\u6d4b\uff09\u3002\u5e38\u89c1\u505a\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>Probe\uff1a\u5b9a\u65f6\u53d1\u8d77 HTTP\/HTTPS\u3001TLS \u63e1\u624b\u3001TCP \u4e09\u6b21\u63e1\u624b\u3001ICMP Ping \u7b49\u63a2\u6d4b\uff0c\u91c7\u96c6 RTT\u3001\u63e1\u624b\u65f6\u5ef6\u548c\u6709\u6548\u8f7d\u8377\u6821\u9a8c\u3002<\/li>\n<li>Telemetry\uff1a\u8282\u70b9\u4e0a\u8fd0\u884c\u8f7b\u91cf\u7ea7\u91c7\u96c6\u8fdb\u7a0b\uff08\u6536\u96c6 Nginx\/Envoy \u8bbf\u95ee\u65e5\u5fd7\u3001\u7cfb\u7edf\u6307\u6807\u3001BGP \u8def\u7531\u72b6\u6001\uff09\uff0c\u5e76\u4f7f\u7528 Prometheus\u3001InfluxDB \u7b49\u65f6\u5e8f\u6570\u636e\u5e93\u6c47\u603b\u3002<\/li>\n<li>\u5206\u5e03\u5f0f Tracing\uff1a\u901a\u8fc7 OpenTelemetry \u94fe\u8def\u8ffd\u8e2a\u8bf7\u6c42\u8def\u5f84\uff0c\u5b9a\u4f4d\u8de8\u8282\u70b9\u6216\u8de8\u6570\u636e\u4e2d\u5fc3\uff08\u5982\u9999\u6e2fVPS \u5230\u7f8e\u56fdVPS \u7684\u56de\u6e90\u94fe\u8def\uff09\u7684\u95ee\u9898\u3002<\/li>\n<\/ul>\n<h3>\u51b3\u7b56\u5c42\u7684\u7b56\u7565\u8bbe\u8ba1<\/h3>\n<p>\u51b3\u7b56\u5f15\u64ce\u9700\u8981\u8bbe\u7f6e\u660e\u786e\u7684\u9608\u503c\u4e0e\u89c4\u5219\uff0c\u540c\u65f6\u652f\u6301\u81ea\u9002\u5e94\u9608\u503c\uff1a<\/p>\n<ul>\n<li>\u5206\u7ea7\u544a\u8b66\uff1a\u77ed\u65f6\u9ad8\u9891\u9519\u8bef\uff08\u4f8b\u5982 1 \u5206\u949f\u5185 20% 5xx\uff09\u89e6\u53d1\u4e34\u65f6\u964d\u8f7d\uff1b\u957f\u671f\u6027\u80fd\u9000\u5316\uff08\u4f8b\u5982 10 \u5206\u949f\u5185\u5e73\u5747\u5ef6\u8fdf\u4e0a\u5347 50%\uff09\u89e6\u53d1\u9694\u79bb\u3002<\/li>\n<li>\u7194\u65ad\u4e0e\u964d\u7ea7\uff1a\u5bf9\u4e0d\u53ef\u7528\u8282\u70b9\u6267\u884c\u5feb\u901f\u7194\u65ad\uff0c\u4e34\u65f6\u5c06\u5176\u4ece\u6d41\u91cf\u6c60\u4e2d\u5254\u9664\uff0c\u5e76\u5c06\u6d41\u91cf\u8fc1\u79fb\u5230\u90bb\u8fd1\u8282\u70b9\uff08\u5982\u4ece\u9999\u6e2f\u8282\u70b9\u5207\u6362\u5230\u65b0\u52a0\u5761\u670d\u52a1\u5668\u6216\u97e9\u56fd\u670d\u52a1\u5668\uff09\uff0c\u786e\u4fdd\u5c31\u8fd1\u56de\u6e90\u4e0e\u6700\u5c0f\u5316\u5ef6\u8fdf\u3002<\/li>\n<li>\u56de\u9000\u4e0e\u8bd5\u63a2\uff1a\u9694\u79bb\u540e\u6267\u884c\u5065\u5eb7\u590d\u68c0\u7b56\u7565\uff08\u6307\u6570\u9000\u907f+\u63a2\u6d4b\uff09\uff0c\u5728\u8fde\u7eed N \u6b21\u63a2\u6d4b\u901a\u8fc7\u540e\u81ea\u52a8\u6062\u590d\u5728\u7ebf\u3002<\/li>\n<\/ul>\n<h2>\u81ea\u52a8\u5316\u4fee\u590d\u4e0e\u6d41\u91cf\u5207\u6362\u5b9e\u8df5<\/h2>\n<p>\u5728\u6267\u884c\u5c42\u5b9e\u73b0\u81ea\u52a8\u5316\uff0c\u9700\u8981\u7efc\u5408\u4f7f\u7528\u5bb9\u5668\u7f16\u6392\uff08Kubernetes\uff09\u3001\u914d\u7f6e\u7ba1\u7406\uff08Ansible\uff09\u3001\u57fa\u7840\u8bbe\u65bd\u5373\u4ee3\u7801\uff08Terraform\uff09\u4e0e\u6d41\u91cf\u8c03\u5ea6 API\uff08BGP\u3001Anycast\u3001DNS \u4f4e TTL\u3001GSLB\uff09\u3002\u5173\u952e\u5b9e\u8df5\u5982\u4e0b\uff1a<\/p>\n<h3>\u5feb\u901f\u9694\u79bb\u4e0e\u7070\u5ea6\u5207\u6362<\/h3>\n<p>\u5f53\u8282\u70b9\u88ab\u5224\u5b9a\u4e3a\u5f02\u5e38\u65f6\uff0c\u4f18\u5148\u91c7\u53d6\u96f6\u7834\u574f\u7684\u9694\u79bb\u7b56\u7565\uff1a<\/p>\n<ul>\n<li>DNS \u4f4e TTL \u7b56\u7565\uff1a\u901a\u8fc7\u964d\u4f4e DNS \u89e3\u6790\u7f13\u5b58\u65f6\u95f4\uff0c\u914d\u5408 GSLB\uff0c\u5feb\u901f\u5c06\u89e3\u6790\u8bf7\u6c42\u5bfc\u5411\u6b63\u5e38\u8282\u70b9\uff08\u4f8b\u5982\u5c06\u9999\u6e2f\u57df\u540d\u89e3\u6790\u4ece\u53d7\u5f71\u54cd\u7684\u9999\u6e2fVPS \u5207\u6362\u5230\u9999\u6e2f\u670d\u52a1\u5668\u96c6\u7fa4\u4ee5\u5916\u7684\u8282\u70b9\uff09\u3002<\/li>\n<li>Anycast \u8def\u7531\u8c03\u6574\uff1a\u5bf9\u4f7f\u7528 Anycast \u7684\u524d\u7aef\u8282\u70b9\uff0c\u53ef\u901a\u8fc7 BGP \u793e\u533a\u6807\u7b7e\u5feb\u901f\u8c03\u6574\u6d41\u91cf\u5230\u5176\u4ed6 Anycast PoP\u3002<\/li>\n<li>\u8fb9\u7f18\u7f13\u5b58\u4f18\u5148\uff1a\u5728\u4e34\u65f6\u56de\u6e90\u53d7\u9650\u65f6\uff0c\u6269\u5927\u7f13\u5b58\u65f6\u95f4\uff08TTL\uff09\u6216\u542f\u7528 stale-while-revalidate \u7b56\u7565\uff0c\u51cf\u5c11\u5bf9\u6e90\u7ad9\uff08\u4f8b\u5982\u7f8e\u56fd\u670d\u52a1\u5668\u3001\u6d77\u5916\u670d\u52a1\u5668\uff09\u538b\u529b\u3002<\/li>\n<\/ul>\n<h3>\u81ea\u52a8\u5316\u4fee\u590d\u6d41\u7a0b<\/h3>\n<p>\u81ea\u52a8\u5316\u4fee\u590d\u6d41\u7a0b\u901a\u5e38\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u81ea\u52a8\u91cd\u542f\u670d\u52a1\uff1a\u901a\u8fc7 systemd\/\u5bb9\u5668\u91cd\u542f\u5931\u8d25\u8fdb\u7a0b\u3002<\/li>\n<li>\u81ea\u52a8\u56de\u6eda\u914d\u7f6e\uff1a\u5982\u679c\u5f02\u5e38\u4e0e\u65b0\u914d\u7f6e\u76f8\u5173\uff0c\u6267\u884c\u7248\u672c\u56de\u6eda\u5e76\u9a8c\u8bc1\u3002<\/li>\n<li>\u91cd\u65b0\u90e8\u7f72\u6216\u66ff\u6362\u8282\u70b9\uff1a\u5728\u4e91\u5e73\u53f0\u6216\u6570\u636e\u4e2d\u5fc3\u4e2d\u81ea\u52a8\u91cd\u5efa\u4e0d\u5065\u5eb7\u8282\u70b9\uff08\u53ef\u8c03\u5ea6\u5230\u65e5\u672c\u670d\u52a1\u5668\u6216\u65b0\u52a0\u5761\u670d\u52a1\u5668\u7b49\u53ef\u7528\u533a\u57df\uff09\uff0c\u5e76\u5c06\u65b0\u8282\u70b9\u52a0\u5165\u8d1f\u8f7d\u6c60\u3002<\/li>\n<li>\u56de\u5f52\u9a8c\u8bc1\uff1a\u5b8c\u6210\u4fee\u590d\u540e\u6267\u884c\u5408\u6210\u63a2\u6d4b\u53ca\u6d41\u91cf\u63a2\u9488\uff0c\u786e\u4fdd\u8282\u70b9\u5728\u771f\u5b9e\u6d41\u91cf\u4e0b\u7a33\u5b9a\u3002<\/li>\n<\/ul>\n<h2>\u5e94\u7528\u573a\u666f\u4e0e\u4f18\u52bf\u5bf9\u6bd4<\/h2>\n<p>\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u81ea\u6108\u4fa7\u91cd\u70b9\u4e0d\u540c\uff1a<\/p>\n<ul>\n<li>\u9762\u5411\u9759\u6001\u5185\u5bb9\u7684 CDN\uff08\u5927\u6587\u4ef6\u3001\u955c\u50cf\uff09\uff1a\u4f18\u5148\u4f7f\u7528\u8fb9\u7f18\u7f13\u5b58\u4e0e\u7f13\u5b58\u4f18\u5148\u7b56\u7565\uff0c\u51cf\u5c11\u6765\u6e90\u538b\u529b\uff1b\u8282\u70b9\u6545\u969c\u65f6\u91c7\u7528\u7f13\u5b58\u56de\u9000\u4e0e\u5c31\u8fd1\u8c03\u5ea6\u3002<\/li>\n<li>\u9762\u5411\u52a8\u6001\u5e94\u7528\u7684 CDN\uff08API\u3001\u89c6\u9891\u76f4\u64ad\uff09\uff1a\u9700\u8981\u66f4\u4f4e\u7684\u5207\u6362\u65f6\u5ef6\u548c\u4e00\u81f4\u6027\u4fdd\u969c\uff0c\u5efa\u8bae\u4f7f\u7528\u53cc\u6d3b\u6e90\u7ad9\u3001\u591a\u6d3b\u6570\u636e\u4e2d\u5fc3\uff08\u4f8b\u5982\u4e9a\u6d32\u4f7f\u7528\u9999\u6e2f\u670d\u52a1\u5668\u4e0e\u65b0\u52a0\u5761\u670d\u52a1\u5668\uff0c\u5317\u7f8e\u4f7f\u7528\u7f8e\u56fd\u670d\u52a1\u5668\uff09\u7ed3\u5408 GSLB\u3002<\/li>\n<li>\u5bf9\u5ef6\u8fdf\u654f\u611f\u7684\u5b9e\u65f6\u5e94\u7528\uff08\u6e38\u620f\u3001\u91d1\u878d\uff09\uff1a\u5e94\u91c7\u7528 Anycast 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