LVS+Keepalived+Squid+Nginx高可用负载均衡缓存配置
前言* 随着互联网IT行业的发展，越来越多的企业开始使用开源软件搭建自己的web架构，主流的LVS也得到了广泛的应用，在保证高可用的同时，用户对网站的体验速度也有了很高的要求，这时候需要我们在我们的架构既要满足高并发同时还要求高速度。 今天我们来搭建主流架构Lvs+Keepalived+Squid+Nginx
实施环境及相关软件：
-
系统：CentOS6.0 x64
-
Ipvsadm：ipvsadm-1.24.tar.gz
-
Keepalived：keepalived-1.1.15.tar.gz
-
Squid：squid-3.1.10
-
Nginx：nginx-1.2.0.tar.gz
-
Ip信息：
-
Lvs-master 192.9.117.139
-
Lvs-backup 192.9.117.140
-
Lvs-vip 192.9.117.145
-
Squid_1 192.9.117.141
-
Squid_2 192.9.117.142
-
Nginx_1 192.9.117.143
-
Nginx_1 192.9.117.144
网络架构图：
-
1、下载源码包
-
cd /usr/src/
-
wget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gz
-
wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
-
2、建立软链接
-
ln -s /usr/src/kernels/2.6.* /usr/src/linux
-
3、安装ipvsadm、keepalived
-
cd /usr/src/ && tar xzvf ipvsadm-1.24.tar.gz &&cd ipvsadm-1.24
-
&& make && make install
-
cd /usr/src/ && tar -xzvf keepalived-1.1.15.tar.gz &&
-
cd keepalived-1.1.15 && ./configure && make && make install
-
4、配置keepalived
-
cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
-
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
-
mkdir -p /etc/keepalived
-
cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
-
cp /usr/local/sbin/keepalived /usr/sbin/
-
! Configuration File for keepalived
-
global_defs {
-
notification_email {
-
wgkgood@163.com
-
}
-
notification_email_from wgkgood@163.com
-
smtp_server 127.0.0.1
-
smtp_connect_timeout 30
-
router_id LVS_DEVEL
-
}
-
# VIP1
-
vrrp_instance VI_1 {
-
state MASTER //备份服务器改成BACKUP
-
interface eth0
-
lvs_sync_daemon_inteface eth0
-
virtual_router_id 51
-
priority 100 //备份服务器改成90
-
advert_int 5
-
authentication {
-
auth_type PASS
-
auth_pass 1111
-
}
-
virtual_ipaddress {
-
192.9.117.145 //VIP地址
-
}
-
}
-
virtual_server 192.9.117.145 80 {
-
delay_loop 6
-
lb_algo rr //lvs算法
-
lb_kind DR
-
persistence_timeout 60
-
protocol TCP
-
real_server 192.9.117.141 80 {
-
weight 100
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 80
-
}
-
}
-
real_server 192.9.117.142 80 {
-
weight 100
-
TCP_CHECK {
-
connect_timeout 10
-
nb_get_retry 3
-
delay_before_retry 3
-
connect_port 80
-
}
-
}
-
}
-
1、给squid指定单独的缓存目录:
-
mkdir -p /data/squid &&chown -R squid:squid /data/squid/
-
2、设置squid日志路径:
-
mkdir -p /data/logs/squid/ && chown -R squid:squid /data/logs/squid/
-
3、安装squid
-
yum install squid -y 即可。
-
4、修改squid.conf配置文件，贴一个简单的squid部分配置文件
-
####http port 2012 05 20
-
http_port 0.0.0.0:80 vhost vport
-
cache_peer 192.9.117.143 parent 80 0 no-digest no-query originserver
-
cache_peer 192.9.117.144 parent 80 0 no-digest no-query originserver
-
cache_mem 2048 MB
-
maximum_object_size_in_memory 4096 KB
-
cache_dir aufs /data/squid 4000 16 512
-
coredump_dir /data/squid
-
启动squid /etc/init.d/squid start 即可！
-
配置完两台squid并启动。并且都可以看到lo:0接口ip地址为VIP地址：
