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如何在 Odoo 上优化 Varnish？

tag-icon • tag-icon varnish odoo
如何在 Odoo 上优化 Varnish？

我想使用 Varnish 4 优化 Odoo 安装。Odoo 使用 Python/Werkzeug 来传递 HTML。Ubuntu 14.04 上安装了 Odoo 8.0rc1 和 Varnish 4.0.1-2~trusty。Odoo/Varnish 都安装在同一台服务器上。使用 ab 进行简单测试后，不使用 Varnish 时每秒收到 117 个请求（在端口 8069 上），使用 Varnish 时每秒收到 116 个请求。在服务器端，不使用 Varnish 时 Odoo 服务器的负载略高（10%）。

有任何想法吗？

这直接针对 Odoo：

aw@lian:~$ ab -n 1000 -c 20 http://myodoo.example.com:8069/web
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking xxx (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        Werkzeug/0.9.4
Server Hostname:        
Server Port:            8069

Document Path:          /web
Document Length:        251 bytes

Concurrency Level:      20
Time taken for tests:   8.516 seconds
Complete requests:      1000
Failed requests:        0
Non-2xx responses:      1000
Total transferred:      476000 bytes
HTML transferred:       251000 bytes
Requests per second:    117.42 [#/sec] (mean)
Time per request:       170.323 [ms] (mean)
Time per request:       8.516 [ms] (mean, across all concurrent requests)
Transfer rate:          54.58 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       29   33   2.5     33      38
Processing:    43  136  28.0    133     226
Waiting:       43  135  28.0    133     225
Total:         73  169  28.3    167     259

Percentage of the requests served within a certain time (ms)
  50%    167
  66%    178
  75%    186
  80%    192
  90%    209
  95%    221
  98%    235
  99%    242
 100%    259 (longest request)

这是通过 Varnish 实现的：

aw@lian:~$ ab -n 1000 -c 20 http://myodoo.example.com/web
This is ApacheBench, Version 2.3 <$Revision: 1528965 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking xxxx (be patient)
Completed 100 requests
Completed 200 requests
Completed 300 requests
Completed 400 requests
Completed 500 requests
Completed 600 requests
Completed 700 requests
Completed 800 requests
Completed 900 requests
Completed 1000 requests
Finished 1000 requests


Server Software:        Werkzeug/0.9.4
Server Hostname:        
Server Port:            80

Document Path:          /web
Document Length:        251 bytes

Concurrency Level:      20
Time taken for tests:   8.603 seconds
Complete requests:      1000
Failed requests:        0
Non-2xx responses:      1000
Total transferred:      536197 bytes
HTML transferred:       251000 bytes
Requests per second:    116.23 [#/sec] (mean)
Time per request:       172.067 [ms] (mean)
Time per request:       8.603 [ms] (mean, across all concurrent requests)
Transfer rate:          60.86 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       29   33   2.5     33      38
Processing:    66  138  31.7    132     272
Waiting:       66  137  30.1    132     255
Total:         95  171  32.1    166     305

Percentage of the requests served within a certain time (ms)
  50%    166
  66%    178
  75%    186
  80%    194
  90%    212
  95%    233
  98%    262
  99%    279
 100%    305 (longest request)
aw@lian:~$

答案1

当您用自己的“vcl”替换默认的“vcl”时，Varnish 的功能将达到最强大。默认情况下，它是在 /etc/varnish/default.vcl (debian) 中配置的。

您需要确保您的启动脚本引用该文件。

如果您已打开它，则可以看到默认代码。基本上，您需要“取消设置”Cookie 标头，因为它是通过系统传入的，这样 Varnish 才能真正缓存该项目。

默认情况下，您至少需要强制使用静态媒体（图像、javascript、css），类似于如下所示：

sub vcl_recv {
    if (req.url ~ "\.(css|js|ico|png|gif|jpg|swf|jpeg|zip)$" ||
            req.url ~ "\.js?ver\=*$" ||
            req.url ~ "\.css?ver\=*$") {
                    unset req.http.cookie; # Cookies not needed here
                    return(lookup);
    }
}

varnish 文档非常详细，介绍了如何在 VCL 中完成你需要做的所有事情。我强烈建议花几个小时阅读它：

v3 文档：https://www.varnish-cache.org/docs/3.0/ v4：https://www.varnish-cache.org/docs/4.0/

具体来说，您可能需要“用户指南”。

Varnish 的威力令人吃惊，但是您使用它得到的只是您投入的！

祝你好运，如果你遇到任何事情，不要犹豫，提出更多问题！

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