nginx+keepalived用rpm安装
首先添加几个源epel,atomic,rpmforge,rpmfusion,方法可以参照前面文章#yum -y install gcc openssl-devel pcre-devel zlib-devel nginx keepalived
#vi /etc/nginx/nginx.conf
#####在http{ 中添加下面的内容
include /etc/nginx/conf.d/*.conf;
client_max_body_size 300m;
client_body_buffer_size 128k;
client_body_temp_path /tmp;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
proxy_connect_timeout 600;
proxy_read_timeout 600;
proxy_send_timeout 600;
proxy_buffer_size 16k;
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k;
proxy_temp_file_write_size 64k;
proxy_temp_path /tmp;
upstream 192.168.100.200 { //192.168.100.159为我的代理地址，下面两IP是应用服务器地址
server 192.168.100.121:80 weight=4 max_fails=2 fail_timeout=30s;
server 192.168.100.122:80 weight=4 max_fails=2 fail_timeout=30s;
}
#vi /etc/nginx/conf.d/default.conf
##########在location / { 中添加下面内容
proxy_pass http://192.168.100.200; //代理的地址,此为VIP
proxy_set_header Host $host;
proxy_redirect off;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504 http_404;
nginx代理已经配置完成，下面配置keepalived
#vi /etc/keepailved
! Configuration File for keepalived
global_defs {
notification_email {
root@localhost
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script nginx.sh {
script "/root/nginx.sh" //监控nginx脚本
interval 1
weight 2
}
vrrp_instance VI_1 {
state MASTER //主机，备机改为SLAVE
interface eth0 //网卡
virtual_router_id 51
priority 200 //优先级，比备机数值大
advert_int 1
authentication {
auth_type PASS
auth_pass 1234
}
track_script { //上面定义的脚本
nginx.sh
}
virtual_ipaddress {
192.168.100.200/24 //虚拟IP（VIP）
}
}
备机的配置只要改
state MASTER ==>state SLAVE
priority 200==>priority 190
其他的不变，接着新建一脚本
#vi /root/nginx.sh
#!/bin/bash
A=`ps -C nginx --no-header |wc -l`
if [ $A -eq 0 ];then // 判断nginx是否未启用
/usr/local/nginx/sbin/nginx // 运行nginx
sleep 3
if [ `ps -C nginx --no-header |wc -l` -eq 0 ];then
//3秒后检测，如果nginx启动出错就关闭keepalived
killall keepalived
fi
fi
主备都添加即可，然后长ping 192.168.100.200,把主机断网，则可以看到有断的
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