Nginx+Keepalive实现高可用+负载均衡并配置多web站点（两台服务器）
主机A：192.168.0.10主机B：192.168.0.20
VIP： 192.168.0.30
域名A：a.com域名B：b.com
1、两台服务器安装nginx（此处省略很多字）；
2、修改两台服务器的nginx配置nginx.conf（nginx.conf的配置可以直接同步）
在http{}里面增加这一段
upstream a.com {
server 192.168.0.10:81;
server 192.168.0.20:81;
# ip_hash;###如果用到session则需要开启ip_hash
}
server {
listen 80;
server_namea.com;
location / {
proxy_pass http://a.com;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For$proxy_add_x_forwarded_for;
}
}
upstream b.com {
server 192.168.0.10:82;
server 192.168.0.20:82;
# ip_hash;###如果用到session则需要开启ip_hash
}
server {
listen 80;
server_nameb.com;
location / {
proxy_pass http://b.com;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For$proxy_add_x_forwarded_for;
}
}
server {
listen 81;
server_name localhost;
index index.html index.htm index.php;
root /tmp/a;
client_max_body_size 1024m;
}
server {
listen 82;
server_name localhost;
index index.html index.htm index.php;
root /tmp/b;
client_max_body_size 1024m;
}
1、安装keepalive（A、B两台操作一样）
可以直接到http://www.keepalived.org/download.html下载最新稳定版
wget http://www.keepalived.org/software/keepalived-1.2.7.tar.gz
tar -xf keepalived-1.2.7.tar.gz
cd keepalived-1.2.7
./configure && make && make install
mkdir /etc/keepalived
vim /etc/keepalived/keepalived.conf
global_defs {
notification_email {
admin@163.com
}
notification_email_from admin@163.com
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_instance VI_1 {
state MASTER#从设置为BACKUP
interface eth0#网卡名
virtual_router_id 51
mcast_src_ip 192.168.0.10 #本机IP
priority 100#从机小于主机
advert_int 1
authentication {
auth_type PASS
auth_pass 123456
}
virtual_ipaddress {
192.168.0.30/16
}
}
/etc/init.d/nginx start
/etc/init.d/keepalived start
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