{"id":30765,"date":"2026-05-01T10:00:00","date_gmt":"2026-05-01T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=30765"},"modified":"2026-05-16T23:36:41","modified_gmt":"2026-05-16T15:36:41","slug":"fastly-vcl-configuration-practical-guide","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/cdn\/fastly-vcl-configuration-practical-guide\/","title":{"rendered":"Fastly VCL \u914d\u7f6e\u5165\u95e8\u4e0e\u5b9e\u6218"},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Fastly VCL \u914d\u7f6e\u6307\u5357\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/fastly-vcl-configuration-practical-guide-cover.webp\" \/><\/p>\n<p>\u672c\u6587\u5c06\u6559\u4f60\u5982\u4f55\u4ece\u96f6\u5199\u51fa\u53ef\u4e0a\u7ebf\u7684 Fastly VCL\uff0c\u5e2e\u4f60\u89e3\u51b3&#8221;\u56fe\u5f62\u89c4\u5219\u8dd1\u4e0d\u901a\u3001\u5fc5\u987b\u5199 VCL \u53c8\u4e0d\u77e5\u9053\u4ece\u54ea\u5f00\u59cb&#8221;\u7684\u95ee\u9898\u3002\u5982\u679c\u4f60\u7684\u4e1a\u52a1\u5bf9\u8fb9\u7f18\u63a7\u5236\u7684\u7cbe\u7ec6\u5ea6\u8981\u6c42\u5f88\u9ad8\uff0c\u4f8b\u5982\u9700\u8981\u6309 Cookie \u5206\u6d41\u3001\u6309\u5730\u533a\u6539\u5199 TTL\u3001\u628a\u65e5\u5fd7\u5b9e\u65f6\u63a8\u5230 SIEM\uff08Security Information and Event Management\uff0c\u5b89\u5168\u4fe1\u606f\u4e0e\u4e8b\u4ef6\u7ba1\u7406\u5e73\u53f0\uff09\uff0c\u90a3\u4e48 Fastly VCL \u914d\u7f6e \u662f\u5c11\u6709\u7684\u80fd\u5b8c\u5168\u66b4\u9732\u5e95\u5c42\u903b\u8f91\u7684\u65b9\u6848\u3002Fastly \u57fa\u4e8e\u5f00\u6e90\u7684 Varnish \u81ea\u7814\uff0c\u63a7\u5236\u8bed\u8a00\u662f VCL\uff08Varnish Configuration Language\uff09\uff0c\u76f8\u6bd4\u56fe\u5f62\u5316\u89c4\u5219\u66f4\u7075\u6d3b\u4e5f\u66f4\u9661\u5ced\u3002\u6574\u7bc7\u6307\u5357\u5c06\u8986\u76d6\u8bf7\u6c42\u6539\u5199\u3001\u7f13\u5b58\u952e\u63a7\u5236\u3001\u65e5\u5fd7\u63a8\u9001\u4e0e\u6545\u969c\u6392\u67e5\u8fd9\u56db\u4e2a\u6838\u5fc3\u573a\u666f\u3002<\/p>\n<h2>\u4e00\u3001Fastly VCL \u9002\u5408\u4ec0\u4e48\u56e2\u961f<\/h2>\n<p>Fastly \u7684\u5b9a\u4ef7\u4e0d\u7b97\u4fbf\u5b9c\uff0c\u6700\u4f4e\u8d77\u6b65\u7ea6\u6bcf\u6708 50 \u7f8e\u5143\u8d77\uff0c\u6d41\u91cf\u8d85\u51fa\u90e8\u5206\u6309 GB \u8ba1\u8d39\u3002\u5b83\u7684\u6838\u5fc3\u4ef7\u503c\u4e0d\u662f&#8221;\u6700\u4fbf\u5b9c\u7684 CDN&#8221;\uff0c\u800c\u662f\u628a\u8fb9\u7f18\u8282\u70b9\u7684\u8bf7\u6c42\u5904\u7406\u8fc7\u7a0b\u51e0\u4e4e\u5168\u90e8\u5f00\u653e\u7ed9\u4f60\u5199\u4ee3\u7801\u3002\u5224\u65ad\u662f\u5426\u503c\u5f97\u5207\u6362\u5230 Fastly\uff0c\u53ef\u4ee5\u53c2\u8003\u4e09\u70b9\uff1a<\/p>\n<ul>\n<li><strong>\u903b\u8f91\u590d\u6742\u5ea6<\/strong>\uff1a\u9700\u8981\u5728\u8fb9\u7f18\u505a 5 \u6761\u4ee5\u4e0a\u89c4\u5219\uff0c\u4e14\u5176\u4e2d 2 \u6761\u6d89\u53ca Cookie \u6216 Header \u4e8c\u6b21\u8ba1\u7b97\u3002<\/li>\n<li><strong>\u53ef\u89c2\u6d4b\u6027\u9700\u6c42<\/strong>\uff1a\u8981\u6c42\u79d2\u7ea7\u65e5\u5fd7\u3001\u80fd\u6309\u5b57\u6bb5\u8def\u7531\u5230\u4e0d\u540c\u63a5\u6536\u7aef\u3002<\/li>\n<li><strong>\u56de\u6e90\u5b89\u5168\u8981\u6c42<\/strong>\uff1a\u6e90\u7ad9\u53ea\u5141\u8bb8 Fastly \u51fa\u53e3 IP \u76f4\u8fde\uff0c\u9700\u8981\u5728 VCL \u4e2d\u505a token \u6821\u9a8c\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u4f60\u7684\u6e90\u7ad9\u5e03\u5728\u8de8\u5883\u94fe\u8def\u4e0a\uff0cVCL \u7684 backend \u914d\u7f6e\u80fd\u7cbe\u786e\u6307\u5b9a\u56de\u6e90\u8282\u70b9\u3002\u56de\u6e90\u4e3b\u673a\u7684\u9009\u578b\u53ef\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/wordpress-hk-hosting-guide\/\">WordPress \u9999\u6e2f\u4e3b\u673a\u9009\u8d2d\u6307\u5357<\/a> \u4e0e <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/cloud-server-buying-guide\/\">\u4e91\u670d\u52a1\u5668\u9009\u8d2d\u6307\u5357<\/a> \u4e2d\u7684\u7f51\u7edc\u7ae0\u8282\u3002Fastly \u5728\u4e9a\u592a\u8282\u70b9\u7684\u8986\u76d6\u8f83\u597d\uff0c\u4f46\u4ecd\u4e0d\u5305\u542b\u4e2d\u56fd\u5927\u9646\uff0c\u56fd\u5185\u8bbf\u95ee\u53d6\u51b3\u4e8e\u56de\u6e90\u4e3b\u673a\u7684\u51fa\u53e3\u8d28\u91cf\u3002<\/p>\n<h2>\u4e8c\u3001Service \u4e0e VCL \u6587\u4ef6\u7ed3\u6784<\/h2>\n<p>Fastly \u63a7\u5236\u53f0\u7684\u6700\u5c0f\u5de5\u4f5c\u5355\u5143\u662f Service\u3002\u4e00\u4e2a Service \u5bf9\u5e94\u4e00\u7ec4\u57df\u540d\u3001\u4e00\u7ec4 backend\u3001\u82e5\u5e72 VCL Snippet \u6216\u4e00\u4efd Custom VCL\u3002\u65b0\u5efa Service \u65f6\u5efa\u8bae\uff1a\u5148\u7528 UI \u914d\u7f6e\u57fa\u7840 backend \u4e0e domain\uff0c\u53d1\u5e03\u5230 Staging\uff0c\u518d\u9010\u6b65\u628a\u89c4\u5219\u5207\u6362\u6210 VCL\u3002<\/p>\n<p>\u4e00\u4efd\u5178\u578b\u7684 Custom VCL \u9aa8\u67b6\u5305\u542b\u4ee5\u4e0b\u51e0\u4e2a subroutine\uff08\u5b50\u4f8b\u7a0b\uff09\uff1a<\/p>\n<pre><code class=\"language-vcl\">sub vcl_recv {\n  #FASTLY recv\n\n  if (req.http.User-Agent ~ &quot;(?i)bot&quot;) {\n    set req.http.X-Is-Bot = &quot;1&quot;;\n  }\n\n  if (req.url ~ &quot;^\/api\/&quot;) {\n    set req.backend = F_api_origin;\n  } else {\n    set req.backend = F_web_origin;\n  }\n}\n\nsub vcl_fetch {\n  #FASTLY fetch\n  if (beresp.status == 200 &amp;&amp; req.url ~ &quot;\\.(jpg|png|webp|css|js)$&quot;) {\n    set beresp.ttl = 7d;\n  }\n}\n\nsub vcl_deliver {\n  #FASTLY deliver\n  set resp.http.X-Cache = if(fastly_info.state ~ &quot;HIT&quot;, &quot;HIT&quot;, &quot;MISS&quot;);\n}\n<\/code><\/pre>\n<p><code>#FASTLY recv<\/code> \u8fd9\u79cd\u6ce8\u91ca\u975e\u5e38\u5173\u952e\uff1a\u5b83\u544a\u8bc9 Fastly \u5728\u8be5\u4f4d\u7f6e\u6ce8\u5165\u5b98\u65b9\u9ed8\u8ba4\u903b\u8f91\uff08\u5982 PURGE \u652f\u6301\u3001Cluster \u6d41\u8f6c\uff09\u3002\u6f0f\u6389\u4f1a\u5bfc\u81f4\u96c6\u7fa4\u5185\u591a\u8282\u70b9\u534f\u4f5c\u5f02\u5e38\u3002<\/p>\n<h2>\u4e09\u3001VCL \u5b9e\u6218\uff1a\u81ea\u5b9a\u4e49\u7f13\u5b58\u952e\u4e0e\u8def\u7531<\/h2>\n<p>\u8fb9\u7f18\u7f13\u5b58\u952e\uff08cache key\uff09\u51b3\u5b9a\u54ea\u4e9b\u8bf7\u6c42\u4f1a\u88ab\u8ba4\u4e3a\u662f&#8221;\u540c\u4e00\u4e2a\u5bf9\u8c61&#8221;\u3002\u9ed8\u8ba4\u5305\u542b URL \u4e0e Host\uff0c\u5f88\u591a\u573a\u666f\u9700\u8981\u52a0\u5165\u989d\u5916\u7ef4\u5ea6\uff0c\u4f8b\u5982\u5728 <code>vcl_hash<\/code> \u4e2d\u6839\u636e <code>Accept-Encoding<\/code> \u5206\u522b\u7ed9 Brotli\u3001Gzip\u3001\u672a\u538b\u7f29\u4e09\u79cd\u72b6\u6001\u52a0\u5165\u4e0d\u540c\u540e\u7f00\uff0c\u786e\u4fdd\u76f8\u540c URL \u5728\u4e09\u79cd\u538b\u7f29\u72b6\u6001\u4e0b\u5206\u522b\u7f13\u5b58\uff0c\u907f\u514d\u628a Brotli \u5185\u5bb9\u53d1\u7ed9\u4e0d\u652f\u6301\u7684\u65e7\u5ba2\u6237\u7aef\u3002<\/p>\n<p>\u8def\u7531\u573a\u666f\u5e38\u89c1\u9700\u6c42\u662f\u628a\u79fb\u52a8\u7aef\u8bf7\u6c42\u548c\u684c\u9762\u7aef\u5206\u6d41\uff0c\u53ef\u5728 <code>vcl_recv<\/code> \u4e2d\u6839\u636e User-Agent \u8bbe\u7f6e <code>X-Device-Type<\/code>\uff0c\u518d\u628a\u8be5 Header \u52a0\u5165 cache key\uff0c\u6e90\u7ad9\u6839\u636e\u5b83\u8fd4\u56de\u4e0d\u540c\u6a21\u677f\u3002Fastly \u8fd8\u63d0\u4f9b <code>client.geo.country_code<\/code> \u5185\u7f6e\u53d8\u91cf\uff0c\u53ef\u76f4\u63a5\u505a\u5730\u533a\u5206\u6d41\u800c\u65e0\u9700\u81ea\u5df1\u89e3\u6790 IP\u3002<\/p>\n<h2>\u56db\u3001\u65e5\u5fd7\u63a8\u9001\u4e0e\u53ef\u89c2\u6d4b\u6027<\/h2>\n<p>Fastly \u7684\u5b9e\u65f6\u65e5\u5fd7\uff08Real-Time Log Streaming\uff09\u662f\u5b83\u5bf9\u6bd4\u4f20\u7edf CDN \u7684\u91cd\u8981\u4f18\u52bf\u3002Service \u2192 Logging \u4e2d\u53ef\u4ee5\u6dfb\u52a0\u591a\u79cd\u63a5\u6536\u7aef\uff1aS3\u3001Azure Blob\u3001Datadog\u3001Splunk\u3001Sumo Logic\u3001HTTP endpoint \u7b49\u3002<\/p>\n<p>\u65e5\u5fd7\u683c\u5f0f\u7528 VCL \u5728 <code>vcl_log<\/code> subroutine \u4e2d\u5b9a\u4e49\uff0c\u628a timestamp\u3001status\u3001cache state\u3001client ip\u3001user agent \u7b49\u5b57\u6bb5\u62fc\u6210 JSON \u4e32\uff0c\u518d\u9009\u62e9 HTTPS JSON \u63a5\u6536\u7aef\uff0c\u4e0b\u6e38 SIEM \u51e0\u4e4e\u53ef\u4ee5\u96f6\u6539\u9020\u63a5\u5165\u3002\u9700\u8981\u6ce8\u610f\uff1a\u65e5\u5fd7\u683c\u5f0f\u5fc5\u987b\u4e3a\u5408\u6cd5 JSON\uff0cVCL \u5b57\u7b26\u4e32\u62fc\u63a5\u9519\u8bef\u4f1a\u5bfc\u81f4\u6574\u6279\u65e5\u5fd7\u88ab\u4e22\u5f03\uff0c\u4f46 Fastly \u4e0d\u4f1a\u4e3b\u52a8\u544a\u8b66\uff0c\u5efa\u8bae\u5148\u7528 Logtail \u7b49\u5e26 schema \u6821\u9a8c\u7684\u63a5\u6536\u7aef\u9a8c\u8bc1\u4e00\u5468\u518d\u5207\u5230\u6b63\u5f0f SIEM \u7cfb\u7edf\u3002<\/p>\n<p>\u5b9e\u9645\u6295\u5165\u4f7f\u7528\u65f6\uff0c\u65e5\u5fd7\u7684\u5b57\u6bb5\u8bbe\u8ba1\u5e94\u8be5\u56f4\u7ed5&#8221;\u4e8b\u540e\u6392\u969c\u6700\u5e38\u7528\u7684\u51e0\u4e2a\u7ef4\u5ea6&#8221;\u6765\u9009\uff1a\u6545\u969c\u65f6\u95f4\u7a97\u53e3\u3001\u95ee\u9898\u8def\u5f84\u3001\u56de\u6e90\u7ed3\u679c\u3001\u5ba2\u6237\u7aef\u5730\u533a\u3002\u628a\u8fd9\u4e9b\u5b57\u6bb5\u63d0\u524d\u56fa\u5316\u597d\uff0c\u907f\u514d\u4e8b\u6545\u53d1\u751f\u65f6\u518d\u4e34\u65f6\u6539 VCL\u3002\u65e5\u5fd7\u4fdd\u7559\u7b56\u7565\u4e5f\u8981\u660e\u786e\uff0c\u4f8b\u5982 7 \u5929\u70ed\u67e5\u8be2\u300130 \u5929\u51b7\u5b58\u300190 \u5929\u5408\u89c4\u5f52\u6863\uff0c\u80fd\u5728\u63a7\u5236\u6210\u672c\u7684\u540c\u65f6\u4fdd\u7559\u8db3\u591f\u7684\u56de\u6eaf\u80fd\u529b\u3002<\/p>\n<h2>\u4e94\u3001Fiddle \u4e0e Stage \u53d1\u5e03<\/h2>\n<p>Fastly \u63d0\u4f9b fiddle.fastly.dev \u8fd9\u79cd\u6c99\u7bb1\u73af\u5883\uff0c\u53ef\u5728\u6d4f\u89c8\u5668\u91cc\u5199 VCL\u3001\u6a21\u62df client \u8bf7\u6c42\u3001\u89c2\u5bdf backend \u54cd\u5e94\u3002\u5f3a\u70c8\u5efa\u8bae\u4efb\u4f55\u8d85\u8fc7 20 \u884c\u7684 VCL \u6539\u52a8\u5148\u5728 Fiddle \u8dd1\u901a\u518d\u63d0\u4ea4\u5230\u6b63\u5f0f Service\u3002<\/p>\n<p>\u6b63\u5f0f Service \u7684 Stage \u6d41\u7a0b\uff1a<\/p>\n<ul>\n<li><strong>Clone<\/strong>\uff1a\u628a\u5f53\u524d\u6fc0\u6d3b\u7248\u672c\u590d\u5236\u4e3a\u65b0\u7248\u672c\u3002<\/li>\n<li><strong>Edit<\/strong>\uff1a\u5728\u65b0\u7248\u672c\u4e0a\u4fee\u6539 VCL\u3001backend\u3001settings\u3002<\/li>\n<li><strong>Validate<\/strong>\uff1aFastly \u81ea\u52a8\u68c0\u67e5\u8bed\u6cd5\uff0c\u672a\u901a\u8fc7\u4e0d\u80fd\u6fc0\u6d3b\u3002<\/li>\n<li><strong>Activate<\/strong>\uff1a\u6fc0\u6d3b\u540e 5 \u5230 10 \u79d2\u751f\u6548\u5230\u5168\u7403\u8282\u70b9\uff1b\u5982\u53d1\u73b0\u95ee\u9898\u53ef\u7acb\u5373 Roll Back \u5230\u4e0a\u4e00\u7248\u672c\u3002<\/li>\n<\/ul>\n<p>\u5bf9\u4e8e WordPress \u7b49\u52a8\u6001\u7ad9\u70b9\uff0cVCL \u8c03\u4f18\u540e\u5efa\u8bae\u540c\u65f6\u68c0\u67e5\u6e90\u7ad9\u7f13\u5b58\u914d\u5408\uff0c\u53ef\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/wordpress\/wordpress-w3-total-cache-tuning\/\">WordPress W3 Total Cache \u8c03\u4f18\u5b9e\u6218<\/a> \u4e2d\u5173\u4e8e\u6d4f\u89c8\u5668\u7f13\u5b58\u4e0e\u8fb9\u7f18\u7f13\u5b58\u7684\u534f\u4f5c\u7ae0\u8282\u3002\u66f4\u591a WordPress \u8fb9\u7f18\u52a0\u901f\u5b9e\u6218\u53ef\u5728 <a href=\"https:\/\/cn.hostease.com\/blog\/category\/wordpress\/\">WordPress \u5206\u7c7b<\/a> \u4e0b\u67e5\u9605\u76f8\u5173\u5185\u5bb9\u3002<\/p>\n<h2>\u516d\u3001\u5e38\u89c1\u6545\u969c\u6392\u67e5<\/h2>\n<p>VCL \u4e0a\u7ebf\u540e\u7684\u9ad8\u9891\u95ee\u9898\u4e0e\u6392\u67e5\u65b9\u5411\uff1a<\/p>\n<ul>\n<li><strong>TTL \u603b\u662f 0 \u6216\u6781\u77ed<\/strong>\uff1a\u901a\u5e38\u6e90\u7ad9\u8fd4\u56de <code>Cache-Control: private<\/code> \u6216 <code>Set-Cookie<\/code>\uff0cFastly \u9ed8\u8ba4\u4e0d\u7f13\u5b58\u5e26 Set-Cookie \u7684\u54cd\u5e94\uff0c\u9700\u8981\u5728 <code>vcl_fetch<\/code> \u4e2d\u663e\u5f0f <code>unset beresp.http.Set-Cookie<\/code>\u3002<\/li>\n<li><strong>PURGE \u4e0d\u751f\u6548<\/strong>\uff1a\u68c0\u67e5 <code>Surrogate-Key<\/code> \u662f\u5426\u5728\u6e90\u7ad9\u6b63\u786e\u8bbe\u7f6e\uff0cVCL \u4e2d <code>purge<\/code> \u547d\u4ee4\u9700\u5e26\u6b63\u786e key \u624d\u80fd\u7cbe\u786e\u6e05\u7f13\u5b58\u3002<\/li>\n<li><strong>\u67d0\u4e9b\u8282\u70b9\u547d\u4e2d\u7387\u5f02\u5e38\u4f4e<\/strong>\uff1a\u53ef\u80fd\u662f Shielding \u914d\u7f6e\u7f3a\u5931\uff0c\u5f00\u542f Origin Shielding \u540e\u4f1a\u663e\u8457\u6539\u5584\u3002<\/li>\n<li><strong>\u56de\u6e90 502<\/strong>\uff1a\u5148\u7528 <code>curl -H \"Host: yourdomain.com\" https:\/\/origin.ip<\/code> \u76f4\u8fde\u6e90\u7ad9\uff0c\u518d\u7528 <a href=\"https:\/\/cn.hostease.com\/blog\/tutorials\/us-vps-deployment-tutorial-guide\/\">\u7f8e\u56fd VPS \u90e8\u7f72\u6559\u7a0b<\/a> \u4e2d\u7684 MTR \u68c0\u67e5 Fastly POP \u5230\u6e90\u7ad9\u7684\u94fe\u8def\u3002<\/li>\n<li><strong>\u65e5\u5fd7\u6761\u76ee\u7f3a\u5931<\/strong>\uff1a\u5148\u5728 Fastly UI \u7684 Live Stats \u770b\u8bf7\u6c42\u662f\u5426\u5230\u8fbe\uff0c\u518d\u53bb\u63a5\u6536\u7aef\u67e5\uff1b\u591a\u534a\u662f\u65e5\u5fd7\u683c\u5f0f JSON \u4e0d\u5408\u6cd5\u5bfc\u81f4\u4e0b\u6e38\u4e22\u5f03\u3002<\/li>\n<\/ul>\n<h2>\u4e03\u3001Snippet \u62c6\u5206\u4e0e\u56e2\u961f\u534f\u4f5c<\/h2>\n<p>\u5b9e\u9645\u751f\u4ea7\u4e2d\u5f88\u5c11\u628a\u6240\u6709 VCL \u5199\u6210\u4e00\u4efd\u5927\u6587\u4ef6\uff0c\u66f4\u5e38\u89c1\u7684\u505a\u6cd5\u662f\u6309\u573a\u666f\u62c6\u5206 Snippet\uff1a\u7f13\u5b58\u952e\u5355\u72ec\u4e00\u4efd\u3001\u65e5\u5fd7\u683c\u5f0f\u5355\u72ec\u4e00\u4efd\u3001\u5730\u533a\u8def\u7531\u5355\u72ec\u4e00\u4efd\u3002\u6bcf\u4efd Snippet \u90fd\u53ef\u4ee5\u5728\u63a7\u5236\u53f0\u5355\u72ec\u542f\u7528\u6216\u505c\u7528\uff0c\u95ee\u9898\u6392\u67e5\u65f6\u4e5f\u66f4\u5bb9\u6613\u9694\u79bb\u5f71\u54cd\u8303\u56f4\u3002\u5efa\u8bae\u628a\u6bcf\u4efd Snippet \u540c\u6b65\u5230 Git \u4ed3\u5e93\u7684 <code>vcl\/snippets\/<\/code> \u76ee\u5f55\uff0c\u8ba9\u56e2\u961f\u65e2\u80fd\u4eab\u53d7 Fastly \u7684\u5feb\u901f\u56de\u6eda\uff0c\u53c8\u80fd\u4fdd\u7559\u5b8c\u6574\u7684\u53d8\u66f4\u5386\u53f2\u3002<\/p>\n<h2>\u603b\u7ed3\u4e0e\u5efa\u8bae<\/h2>\n<p>Fastly VCL \u914d\u7f6e \u9002\u5408\u9700\u8981\u5728\u8fb9\u7f18\u505a\u6df1\u5ea6\u5b9a\u5236\u7684\u4e2d\u5927\u578b\u56e2\u961f\uff0c\u521d\u5b66\u8005\u5efa\u8bae\u5148\u4ece\u4e00\u4e2a 20 \u884c\u4ee5\u5185\u7684 Snippet \u8d77\u6b65\uff0c\u4f8b\u5982\u81ea\u5b9a\u4e49 cache key \u6216\u8def\u5f84\u7ea7 TTL\uff0c\u8dd1\u7a33\u540e\u518d\u6269\u5c55\u5230\u65e5\u5fd7\u63a8\u9001\u4e0e backend \u8def\u7531\u3002\u5982\u679c\u4f60\u9700\u8981\u628a Fastly \u4e0e\u5df2\u6709\u6e90\u7ad9\u7ec4\u5408\uff0c\u53ef\u4ee5\u8003\u8651\u5148\u7528 VCL \u63a5\u7ba1\u7f13\u5b58\u4e0e\u65e5\u5fd7\u5c42\uff0c\u6e90\u7ad9\u7ee7\u7eed\u627f\u62c5\u4e1a\u52a1\u903b\u8f91\uff0c\u8fc1\u79fb\u66f4\u53ef\u63a7\u3002\u6574\u4f53\u6765\u770b\uff0cVCL \u7684\u5b66\u4e60\u6210\u672c\u4e0d\u4f4e\u4f46\u56de\u62a5\u660e\u786e\uff0c\u80fd\u8ba9\u4f60\u7684\u8fb9\u7f18\u7b56\u7565\u771f\u6b63\u6309\u4e1a\u52a1\u9700\u8981\u53d1\u6325\u4f5c\u7528\u800c\u4e0d\u662f\u88ab\u89c4\u5219\u6a21\u677f\u9650\u5236\u3002\u518d\u52a0\u4e0a Fastly \u5728 Staging \u4e0e Roll Back \u4e0a\u7684\u5de5\u7a0b\u53cb\u597d\u5ea6\uff0c\u8ba9\u56e2\u961f\u53ef\u4ee5\u4ee5\u8f83\u5c0f\u7684\u98ce\u9669\u8fdb\u884c\u8fb9\u7f18\u903b\u8f91\u5b9e\u9a8c\uff0c\u9010\u6b65\u6c89\u6dc0\u5c5e\u4e8e\u81ea\u5df1\u4e1a\u52a1\u7684 VCL \u6a21\u677f\u5e93\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6559\u4f60\u5982\u4f55\u7528 Fastly VCL 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