Linux下搭建keepalive+nginx
一、 安装nginx（略）
二、 安装keepalive
- 下载http://www.keepalived.org/download.html
- 安装依赖包 yum install –y popt* gcc* openssl* nmap
- tar fvxz keepalived-1.2.15.tar.gz
- cd keepalived-1.2.15
- ./configure –prefix=/usr/local/keepalived
- make && make installmkdir /etc/keepalived ##为keepalived创建配置文件目录，默认配置文件从/etc/keepalived下读取
- cp /usr/local/keepalived/sbin/keepalived /usr/sbin/ ##复制keepalived的二进制命令
- cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ ##提供启动脚本
- cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ ##keepalived的主
- cp /usr/local/keepalived/ety/sysconfig/keepalived /usr/sysconfig/
三、 配置keepalive
1． 打开配置文件vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
liumingtao@zhanghetianxia.com
lmt122900@sina.com
}
notification_email_from pub@easymobi.cn
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_DEVEL
}
vrrp_script chk_http_port {
script "/opt/nginx.sh" #检测nginx是否存活脚本位置（下面会有定义脚本名）
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER # 主 （备用 BACKUP）
interface eth0 #本机ip网卡名称
virtual_router_id 10 # 每组keepalive routeid相同，不同组不能一样
mcast_src_ip 192.168.102.79 #本机ip 备机用备机ip
priority 100 #权重 备机数值要比主的数值小
advert_int 1 # 检查间隔
authentication {
auth_type PASS
auth_pass 1111222
}
track_script {
chk_http_port #定义nginx检测脚本名称
}
virtual_ipaddress {
192.168.102.89 #虚拟ip
}
}
启动主备的keepalived验证
nginx.sh 脚本 备机可以不用定义脚本相关选项
#!/bin/sh
# check nginx server status
NGINX=/usr/local/nginx/sbin/nginx
PORT=80
nmap localhost -p $PORT | grep "$PORT/tcp open"
#echo $?
if [ $? -ne 0 ];then
$NGINX -s stop
$NGINX
sleep 3
nmap localhost -p $PORT | grep "$PORT/tcp open"
[ $? -ne 0 ] && /etc/init.d/keepalived stop
fi
把脚本加上执行权限后放到/opt/目录下
