【去除干扰环境】关停：本机的httpd，haproxy，nginx iptables
【varnish 优秀的缓存服务器】
特点反向代理，负载均衡，健康状态检查
连接弱于nginx，nginx比varnish反向代理好
【看看】
curl -I www.sohu.com Cache-Control: no-transform, max-age=120
【安装】
varnish-3.0.4-1.el6.x86_64.rpm varnish-libs-3.0.4-1.el6.x86_64.rpm rpm -ivh varnish-*
【启动服务】
service varnish restart
【端口监听】
[root@localhost home]# netstat -tnlp | grep "var" tcp 0 0 0.0.0.0:6081 0.0.0.0:* LISTEN 9876/varnishd tcp 0 0 127.0.0.1:6082 0.0.0.0:* LISTEN 9875/varnishd tcp 0 0 :::6081 :::* LISTEN 9876/varnishd
【使用基于本机内存做缓存大小】
vim /etc/sysconfig/varnish
修改
VARNISH_STORAGE_SIZE=1G
#
# # Backend storage specification
VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
*********************修改为**************************************************
VARNISH_STORAGE_SIZE=256M
#
# # Backend storage specification
VARNISH_STORAGE="file,${VARNISH_STORAGE_FILE},${VARNISH_STORAGE_SIZE}"
VARNISH_STORAGE="malloc,${VARNISH_STORAGE_SIZE}"
*****************************************************************************【重启服务】service varnish restart
【本机做缓存，后台web服务】
vim /etc/varnish/default.vcl
【改】
backend default {
.host = "127.0.0.1";
.port = "80";
}
backend default {
.host = "192.168.3.5";
.port = "80";
}
#
service varnish restart【确保后台web服务 已启动】
http://172.16.0.102 失败 http://172.16.0.102:6081 这才是正常的
【后面两台当负载均衡】
备份
cp /etc/varnish/default.vcl /etc/varnish/default.vcl.bak
修改
vim /etc/varnish/default.vcl
随机访问，加权重
backend server1 {
.host = "192.168.3.5";
.port = "80";
}
backend server2 {
.host = "192.168.3.6";
.port = "80";
}
director myload random {
{
.backend = server1;
.weight = 3;
}
{
.backend = server2;
.weight = 1;
}
}
sub vcl_recv {
set req.backend = myload;
}【去除干扰环境】关停：本机的httpd，haproxy，nginx iptables
【测试OK】http://172.16.0.102:6081/
【varnishadm管理】
varnishadm -T 127.0.0.1:6082 -S /etc/varnish/secret
help 帮助，quite退出
【启用日志管理】不建议开启varnish的日志，IO操作影响磁盘
service varnishlog restart service varnishncsa restart cat /var/log/varnish/varnishncsa.log
访问http://172.16.0.102:6081/试试
172.16.0.101 - - [30/May/2015:09:44:53 +0800] "GET http://172.16.0.102:6081/ HTTP/1.1" 200 40 "-" "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0"
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