本次试验为squid代理nginx，缓存web网页的内容
访问流程如下：
Squid安装
1.去官网下载安装包http://www.squid-cache.org/
2.拷贝到服务器上
3.解压tar -zxf squid-3.3.8.tar.gz
4.编译安装
mkdir/usr/local/squid
./configure--prefix=/usr/local/squid/
make &&make install
配置squid
5.增加squid用户和组
groupadd squid
useradd –g squidsquid
6.修改squid配置文件
vim/usr/local/squid/etc/squid.conf
我的配置文件如下：
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged)machines
acl SSL_ports port 443
acl Safe_ports port 80 # http
acl Safe_ports port 21 # ftp
acl Safe_ports port 443 # https
acl Safe_ports port 70 # gopher
acl Safe_ports port 210 # wais
acl Safe_ports port 1025-65535 # unregistered ports
acl Safe_ports port 280 # http-mgmt
acl Safe_ports port 488 # gss-http
acl Safe_ports port 591 # filemaker
acl Safe_ports port 777 # multiling http
acl CONNECT method CONNECT
http_access deny !Safe_ports
http_access deny CONNECT!SSL_ports
http_access allow localhostmanager
http_access deny manager
http_access allow localnet
http_access allow localhost
http_port 80 accel vhost vport
cache_peer 127.0.0.1 parent 80800 no-query originserver name=www
cache_peer_access www allow all
http_access deny all
cache_dir ufs/usr/local/squid/var/cache/squid 100 16 256
coredump_dir/usr/local/squid/var/cache/squid
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i(/cgi-bin/|\?) 0 0% 0
refresh_pattern . 0 20% 4320
cache_effective_user squid
cache_effective_group squid
修改的地方见高亮部分
7.将/usr/local/squid的目录所有者改为squid
chown -Rsquid.squid /usr/local/squid/
squid的启动、重启
8.启动 /usr/local/squid/sbin/squid
9.停止/usr/local/squid/sbin/squid -k shutdown
10.重新加载配置文件 /usr/local/squid/sbin/squid-k reconfigure
11.初始化缓存/usr/local/squid/sbin/squid –z
Squid缓存效果
查看命中率信息
/usr/local/squid/bin/squidclient -hlocalhost -p 80 mgr:info
