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分类: 系统运维
2014-01-09 09:58:52
打开Varnish配置文件
cat /usr/local/varnish/etc/varnish/default.vcl
Varnish简单配置信息如下
backend default { .host = "127.0.0.1"; .port = "9999"; } #定义后端应用端口 sub vcl_recv { if (req.restarts == 0) { if (req.http.x-forwarded-for) { set req.http.X-Forwarded-For = req.http.X-Forwarded-For ", " client.ip; } else { set req.http.X-Forwarded-For = client.ip; } } if (req.url ~ "\.(png|gif|jpg|swf|css|js)$") { return (lookup); } return (pass); } #图片、swf等静态文件设置缓存,其他类型文件pass到后端. sub vcl_pipe { set bereq.http.connection = "close"; return (pipe); } sub vcl_pass { return (pass); }
启动Varnish:
/usr/local/varnish/sbin/varnishd -f /usr/local/varnish/etc/varnish/default.vcl -s malloc,128M -T 127.0.0.1:2500 -a 0.0.0.0:80
查看状态:
/usr/local/varnish/bin/varnishstat
查看Referer:
/usr/local/varnish/bin/varnishtop -i rxheader -I Referer
查看访问路径:
/usr/local/varnish/bin/varnishtop -i rxurl
配置文件说明:
(1)、Varnish通过反向代理请求后端IP为74.82.170.235,端口为80的web服务器;
(2)、Varnish允许localhost、127.0.0.1、74.82.170.235三个来源IP通过PURGE方法清除缓存;
(3)、Varnish对域名为的请求进行处理,非域名的请求则返回“Cai Yuan Zhi Cache Server”;
(4)、Varnish对HTTP协议中的GET、HEAD请求进行缓存,对POST请求透过,让其直接访问后端Web服务器。之所以这样配置,是因为POST请求一般是发送数据给服务器的,需要服务器接收、处理,所以不缓存;
(5)、Varnish对以.txt和.js结尾的URL缓存时间设置1小时,对其他的URL缓存时间设置为30天。
# 创建缓存目录和日志文件目录
mkdir -p /var/vcache chmod +w /var/vcache chown -R www:www /var/vcache mkdir -p /var/log/varnish chmod +w /var/log/varnish chown -R www:www /var/log/varnish
# 启动Varnish
# /usr/local/varnish/sbin/varnishd -n /var/vcache -f /usr/local/varnish/vcl.conf -a 0.0.0.0:80 -s file,/var/vcache/varnish_cache.data,1G -g www -u www -w 30000,51200,10 -T 127.0.0.1:3500 -p client_http11=on
参数说明:
-n 缓存写入路径
-f 指定配置文件启动
-a 监听本机的网卡的80端口
-T 指定本机的varnish管理端口
-s file 指定varnish缓存文件的位置以及大小
-w 指处理的最小请求数、最大请求数、超时时间
-g 组名
-u 用户名
-p client_http11=on 支持http1.1协议
-P 指定其进程码文件的位置
# 启动varnishncsa用来将Varnish访问日志写入日志文件
/usr/local/varnish/bin/varnishncsa -n /var/vcache -w /var/log/varnish/varnish.log &
# 通过 Varnish 管理端口進行管理
# /usr/local/varnish/bin/varnishadm -T 127.0.0.1:3500 help
# 清除具体URL地址
# /usr/local/varnish/bin/varnishadm -T 127.0.0.1:3500 url.purge /a/
# /usr/local/varnish/bin/varnishadm -T 127.0.0.1:3500 url.purge w*$
# 清除所有缓存
# /usr/local/varnish-2.1/bin/varnishadm -T 127.0.0.1:3500 url.purge *$
# 通过varnishstat监控varnish状态
/usr/local/varnish/bin/varnishstat –n var/vcache
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#如果使用虚拟主机,请参照下面代码
backend www { set backend.host = ""; set backend.port = "80"; } backend images { set backend.host = "images.example.com"; set backend.port = "80"; } sub vcl_recv { if (req.http.host ~ "^(www.)?example.com$") { set req.backend = www; } elsif (req.http.host ~ "^images.example.com") { set req.backend = images; } else { error 404 "Unknown virtual host"; } } #关于cache存在时间设置 sub vcl_fetch { if (obj.ttl < 120s) { set obj.ttl = 120s; } }