13 StatSess c 127.0.0.2 48714 0 1 1 0 1 1 687 2573
24 BackendXID b 1374630903
24 TxRequest b GET
24 TxURL b /do_ajax.php?action=get-dom
24 TxProtocol b HTTP/1.0
24 TxHeader b X-Forwarded-Proto: https
24 TxHeader b X-Forwarded-Port: 443
24 TxHeader b Host: www.officestocks.com
24 TxHeader b Accept-Language: en-US,en;q=0.9
24 TxHeader b Accept: text/plain, */*; q=0.01
24 TxHeader b User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1
24 TxHeader b Referer: https://www.officestocks.com/
24 TxHeader b X-Requested-With: XMLHttpRequest
24 TxHeader b X-Remote-IP: 184.89.213.63
24 TxHeader b X-Forwarded-For: 184.89.213.63
24 TxHeader b Accept-Encoding: gzip
24 TxHeader b X-Varnish: 1374630903
24 RxProtocol b HTTP/1.1
24 RxStatus b 200
24 RxResponse b OK
24 RxHeader b Date: Fri, 04 Mar 2022 20:20:57 GMT
24 RxHeader b Server: Apache/2.2.15 (CentOS)
24 RxHeader b X-Robots-Tag: noindex
24 RxHeader b X-Content-Type-Options: nosniff
24 RxHeader b Expires: Wed, 11 Jan 1984 05:00:00 GMT
24 RxHeader b Cache-Control: no-cache, must-revalidate, max-age=0
24 RxHeader b X-Frame-Options: SAMEORIGIN
24 RxHeader b Referrer-Policy: strict-origin-when-cross-origin
24 RxHeader b Vary: Accept-Encoding,User-Agent
24 RxHeader b Content-Encoding: gzip
24 RxHeader b Connection: close
24 RxHeader b Content-Type: text/html; charset=UTF-8
24 Fetch_Body b 5(eof) cls 0 mklen 1
24 Length b 26
24 BackendClose b default
12 SessionOpen c 127.0.0.2 48702 127.0.0.2:80
12 ReqStart c 127.0.0.2 48702 1374630903
12 RxRequest c GET
12 RxURL c /do_ajax.php?action=get-dom
12 RxProtocol c HTTP/1.0
12 RxHeader c X-Real-IP: 184.89.213.63
12 RxHeader c X-Forwarded-For: 184.89.213.63
12 RxHeader c X-Forwarded-Proto: https
12 RxHeader c X-Forwarded-Port: 443
12 RxHeader c Host: www.officestocks.com
12 RxHeader c Connection: close
12 RxHeader c Accept-Language: en-US,en;q=0.9
12 RxHeader c Accept-Encoding: gzip, deflate, br
12 RxHeader c Accept: text/plain, */*; q=0.01
12 RxHeader c User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_3_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Mobile/15E148 Safari/604.1
12 RxHeader c Referer: https://www.officestocks.com/
12 RxHeader c Cache-Control: max-age=1000
12 RxHeader c X-Requested-With: XMLHttpRequest
12 VCL_call c recv
12 VCL_acl c MATCH proxyIps 127.0.0.2
12 VCL_return c lookup
12 VCL_call c hash
12 Hash c /do_ajax.php?action=get-dom
12 Hash c www.officestocks.com
12 Hash c 443
12 Hash c
12 VCL_return c hash
12 HitPass c 1374630098
12 VCL_call c pass pass
12 Backend c 24 default default
12 TTL c 1374630903 RFC 0 -1 -1 1646425258 0 1646425257 442645200 0
12 VCL_call c fetch
12 TTL c 1374630903 VCL -0 120 -1 1646425258 -1
12 TTL c 1374630903 VCL 121 120 -1 1646425258 -1
12 VCL_return c hit_for_pass
12 ObjProtocol c HTTP/1.1
12 ObjResponse c OK
12 ObjHeader c Date: Fri, 04 Mar 2022 20:20:57 GMT
12 ObjHeader c Server: Apache/2.2.15 (CentOS)
12 ObjHeader c X-Robots-Tag: noindex
12 ObjHeader c X-Content-Type-Options: nosniff
12 ObjHeader c Expires: Wed, 11 Jan 1984 05:00:00 GMT
12 ObjHeader c Cache-Control: no-cache, must-revalidate, max-age=0
12 ObjHeader c X-Frame-Options: SAMEORIGIN
12 ObjHeader c Referrer-Policy: strict-origin-when-cross-origin
12 ObjHeader c Content-Encoding: gzip
12 ObjHeader c Content-Type: text/html; charset=UTF-8
12 Gzip c u F - 26 0 80 128 138
12 VCL_call c deliver deliver
12 TxProtocol c HTTP/1.1
12 TxStatus c 200
12 TxResponse c OK
12 TxHeader c Server: Apache/2.2.15 (CentOS)
12 TxHeader c X-Robots-Tag: noindex
12 TxHeader c X-Content-Type-Options: nosniff
12 TxHeader c Expires: Wed, 11 Jan 1984 05:00:00 GMT
12 TxHeader c Cache-Control: no-cache, must-revalidate, max-age=0
12 TxHeader c X-Frame-Options: SAMEORIGIN
12 TxHeader c Referrer-Policy: strict-origin-when-cross-origin
12 TxHeader c Content-Encoding: gzip
12 TxHeader c Content-Type: text/html; charset=UTF-8
12 TxHeader c Content-Length: 26
12 TxHeader c Accept-Ranges: bytes
12 TxHeader c Date: Fri, 04 Mar 2022 20:20:58 GMT
12 TxHeader c X-Varnish: 1374630903
12 TxHeader c Via: 1.1 varnish
12 TxHeader c Connection: close
12 TxHeader c X-Age: 0
12 TxHeader c X-Cache: MISS
12 TxHeader c X-Pragma:
12 TxHeader c X-Cache-Control:
12 TxHeader c X-Stock:
12 TxHeader c X-URL: /do_ajax.php?action=get-dom
12 TxHeader c X-Auth:
12 TxHeader c X-IP:
12 Length c 26
12 ReqEnd c 1374630903 1646425257.592263222 1646425258.176410437 0.000068903 0.584094763 0.000052452
12 SessionClose c Connection: close
所以我调试了一下，发现 varnish 正在执行缓存查找，但结果返回了一个命中通过的对象。但在阅读了以下内容后： https://stackoverflow.com/questions/12691489/varnish-hit-for-pass-means如果我理解正确的话，我发现由于流量太大它没有缓存，有没有办法强制清漆缓存对象？
我看到了类似这些东西，但我不确定如何在我的清漆配置中覆盖它：
12 TxHeader c Expires: Wed, 11 Jan 1984 05:00:00 GMT
刚刚看到这个，但除了确定问题可能是什么之外，它并没有帮助我：
https://stackoverflow.com/questions/35449723/varnish-what-is-causing-hit-for-pass
答案1
您的后端返回一个Cache-Control: no-cache, must-revalidate, max-age=0标头，明确告诉 Varnish 不要缓存。
我最初的建议是确保/do_ajax.php?action=get-dom资源返回Cache-Control允许缓存的标头。
如果不可能的话，您可以始终使用以下 VCL 代码来强制缓存：
sub vcl_backend_response {
if(bereq.url == "/do_ajax.php?action=get-dom") {
unset beresp.http.Expires;
set beresp.http.Cache-control = "public, max-age=3600";
set beresp.ttl = 1h;
return(deliver);
}
}
重要的：根据
varnishlog命令的输出，我可以看到你正在使用过时的 Varnish 版本。你能确保你使用的是 Varnish 6 或 7 吗？请参阅https://www.varnish-software.com/developers/downloads/了解下载和安装说明。