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社区首页 >问答首页 >不适用于请求头大小> 8KB的清漆http_req_hdr_len参数

问不适用于请求头大小> 8KB的清漆http_req_hdr_len参数
EN

Stack Overflow用户
提问于 2021-03-05 14:45:01
回答 2查看 2.1K关注 0票数 2

我试图在varnishd命令中将最大请求头大小设置为16 in。下面是varnishd命令的样子：

代码语言：javascript
复制
/usr/sbin/varnishd \
        -P /var/run/varnish.pid \
        -f $VARNISH_VCL_CONF \
        -a ${VARNISH_LISTEN_ADDRESS}:${VARNISH_LISTEN_PORT} \
        -T ${VARNISH_ADMIN_LISTEN_ADDRESS}:${VARNISH_ADMIN_LISTEN_PORT} \
        -p http_req_hdr_len=16384 \
        -p http_resp_hdr_len=16384 \
        -t $VARNISH_TTL \
        -S $VARNISH_SECRET_FILE \
        -s $VARNISH_STORAGE \

在上面的配置中，当我尝试执行标题大小大于8KB的请求时，varnish不接受该请求。我已经在vcl_recv方法中输入了LOG语句，但是这些请求的varnishlog中没有出现任何内容。我确信这些参数(http_req_hdr_len)是有效的，因为当我将这些参数设置为最小值(比如40字节)时，清漆不接受正常的请求(例如，头部大小在2kb左右的请求)。

根据请求添加标题列表：

代码语言：javascript
复制
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* :scheme: https accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9 accept-encoding: gzip, deflate, br accept-language: en-GB,en-US;q=0.9,en;q=0.8 cache-control: no-cache cookie: heavy-cookie=heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookieheavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookieheavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-ccookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookiokie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-hea; at_check=true; AMCVS_AD455AA8591B70C90A495EA3%40AdobeOrg=1; geoPreference=denied;  ippo-ab.d=%7B%22vid%22%3A%2246604622306408834460545976289125483240%22%2C%22vehicles%22%3A%7B%22etc%22%3A%7B%22lvl%22%3A0%2C%22myy%22%3A%22%22%2C%22year%22%3A%22%22%2C%22make%22%3A%22%22%2C%22veh%22%3A%22%22%2C%22trim%22%3A%22%22%2C%22tpms%22%3A%22%22%2C%22dt%22%3A%22%22%7D%2C%22tce%22%3A%7B%22lvl%22%3A4%2C%22myy%22%3A%222016-Audi-allroad%22%2C%22year%22%3A%222016%22%2C%22make%22%3A%22Audi%22%2C%22model%22%3A%22allroad%22%2C%22trim%22%3A%22Premium%22%2C%22tpms%22%3A%221%22%2C%22dt%22%3A%2203%2F08%2F2021%2008%3A08%3A02%20GMT%22%7D%2C%22aux%22%3A%7B%22lvl%22%3A0%2C%22myy%22%3A%22%22%2C%22year%22%3A%22%22%2C%22make%22%3A%22%22%2C%22model%22%3A%22%22%2C%22engine%22%3A%22%22%2C%22dt%22%3A%22%22%7D%7D%2C%22site%22%3A%22FCAC%22%2C%22location%22%3A%7B%22deviceNumber%22%3A%22357166%22%2C%22locationLvl%22%3A2%2C%22myZip%22%3A%2227455%22%2C%22myCity%22%3A%22%22%2C%22myState%22%3A%22%22%2C%22autoZip%22%3A%2260605%22%7D%2C%22tires%22%3A%7B%22main%22%3A%7B%22lvl%22%3A0%2C%22cs%22%3A%22%22%2C%22ar%22%3A%22%22%2C%22rs%22%3A%22%22%2C%22tireSize%22%3A%22%22%2C%22dt%22%3A%22%22%7D%2C%22tce%22%3A%7B%22lvl%22%3A0%2C%22cs%22%3A%22%22%2C%22ar%22%3A%22%22%2C%22rs%22%3A%22%22%2C%22tireSize%22%3A%22%22%2C%22dt%22%3A%22%22%7D%7D%7D%3Bipe.34220.pageViewedCount%3D6%3Bipe_34220_fov%3D%7B%22numberOfVisits%22%3A2%2C
*/
    ix-dev.devicecaresystem.com%252Fbsro%252Fservices%252Fheavy-cookie%252C38%252C38%252C414%252C1536%252C414%252C1536%252C864%252C1.25%252CP%3B%20s_ppv%3D404%25253Ahttps%25253A%252F%252Fix-dev.devicecaresystem.com%252Fbsro%252Fservices%252Fheavy-cookie%252C38%252C38%252C414%252C1536%252C330%252C1536%252C864%252C1.25%252CP%3B; s_pers=%20s_vnum%3D1622717469965%2526vn%253D6%7C1622717469965%3B%20s_invisit%3Dtrue%7C1615204800559%3B%20last_v%3D1615203000568%7C1709811000568%3B%20last_v_s%3DLess%2520than%25201%2520day%7C1615204800568%3B%20gpv%3D404%253Ahttps%253A%252F%252Fix-dev.devicecaresystem.com%252Fbsro%252Fservices%252Fheavy-cookie%7C1615204800576%3B%20s_nr%3D1615203000580-Repeat%7C1646739000580%3B%20s_depth%3D1%7C1615204800586%3B pragma: no-cache sec-ch-ua: "Chromium";v="88", "Google Chrome";v="88", ";Not A Brand";v="99" sec-ch-ua-mobile: ?0 sec-fetch-dest: document sec-fetch-mode: navigate sec-fetch-site: none sec-fetch-user: ?1 upgrade-insecure-requests: 1 user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36
varnish
varnish-vcl
varnish-4
EN

回答 2

Stack Overflow用户

回答已采纳

发布于 2021-03-06 08:46:49

标头尺寸

您可以对5个参数进行优化，以影响请求和响应头的大小和长度：

  • http_max_hdr：请求或响应可能包含的最大页眉数。默认值是64
  • http_req_hdr_len：，即单个请求头的最大大小。默认情况下，这是8KB
  • http_req_size：，即HTTP请求的最大总大小。这默认为32 KB
  • http_resp_hdr_len：，这是单个响应头的最大大小。默认情况下，这是8KB
  • http_resp_size：，即的最大总大小。这默认为32 KB

。

因此，您不仅必须设置单个请求和响应头的最大大小，还必须设置请求和响应头所消耗的总大小。还请记住，标头的数量限制在64 (默认情况下)。

工作区设置

游戏中还有另一个限制因素:在单个请求/响应中可以消耗的最大内存量。

HTTP处理的

  • workspace_client：内存分配。用于后端处理的total
  • workspace_backend：内存分配中的默认值为64 is。默认值在总

中为64 in。

如果请求和响应总数超过64 in，工作区限制就会生效。所以你也需要对这些值进行调优。

测试您的长曲奇用例

在测试了您的长cookie用例之后，我得出了这样的结论:如果http_req_hdr_len增加到16k，Varnish就能很好地处理这个问题。

下面是用于请求的cookie值：

代码语言：javascript
复制
/*
* 提示：该行代码过长，系统自动注释不进行高亮。一键复制会移除系统注释 
* Cookie: heavy-cookie=heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookieheavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookieheavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-ccookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookiokie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-heavy-cookie-hea; 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s_pers=%20s_vnum%3D1622717469965%2526vn%253D6%7C1622717469965%3B%20s_invisit%3Dtrue%7C1615204800559%3B%20last_v%3D1615203000568%7C1709811000568%3B%20last_v_s%3DLess%2520than%25201%2520day%7C1615204800568%3B%20gpv%3D404%253Ahttps%253A%252F%252Fix-dev.devicecaresystem.com%252Fbsro%252Fservices%252Fheavy-cookie%7C1615204800576%3B%20s_nr%3D1615203000580-Repeat%7C1646739000580%3B%20s_depth%3D1%7C1615204800586%3B
*/

如果没有http_req_hdr_len升级，我得到的HTTP/400错误与您收到的相同。升级之后，我遇到了一个HTTP/431 Request Header Fields Too Large错误。

我以为还有另一个设置需要调优，但我得出的结论是，这个HTTP/431错误来自我的后端服务器，而不是。

然后，我创建了下面的VCL片段来执行一个综合响应，它将显示cookie

代码语言：javascript
复制
vcl 4.1;

backend default none;

sub vcl_recv {
    return(synth(200));
}

sub vcl_synth {
   set resp.http.Content-Type = "text/plain";
   set resp.body = req.http.Cookie;
   set resp.reason = "OK";
   return(deliver);
}

结果是，完整的cookie是由synth显示的，这允许我得出结论，将http_req_hdr_len设置为足够高的值将解决问题。

票数 2
EN

Stack Overflow用户

发布于 2021-03-10 11:29:35

在我的案子中，问题就在代理层面。在haproxy中将缓冲区大小设置为一定级别(> 16 in )后，请求现在达到清漆。我接受了Thijs的回答，因为它帮助我得出结论，即请求没有到达清漆本身。

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/66494594

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