Nginx+Keepalived高可用架构平台
前言* 随着Nginx在国内的发展潮流，越来越多的互联网公司都在使用Nginx。Nginx高性能、稳定性成为IT人士青睐的http和反向代理服务器。今天我们来一起来温习一下Nginx+Keepalived高可用配置，鉴于互联网类似的优秀文章很多，这里仅供参考和交流。一、实验环境：系统环境：CentOS 6.0 x86_64Nginx版本：nginx v1.2.4Keepalived版本：keepalived v1.2.1Nginx-1：192.9.117.160 （Master）Nginx-2：192.9.117.161 （Backup）二、Nginx安装配置：分别在两台服务器安装Nginx、keepalived，如下： yum install -y pcre-devel 安装perl 兼容的正规表达式库 tar -xzf nginx-1.2.4.tar.gz && cd nginx-1.2.4 ; sed -i -e 's/1.2.2//g' -e 's/nginx\//TDTWS/g' -e 's/"NGINX"/"TDTWS"/g' src/core/nginx.h &&./configure --prefix=/usr/local/nginx --user=www --group=www--with-http_stub_status_module --with-http_ssl_module 三、Keepalived安装配置：tar -xzvf keepalived-1.2.1.tar.gz &&cd keepalived-1.2.1 && ./configure && make && make install if [ $? -eq 0 ];then echo "Install keepalived success,please waiting configure keepalived ..............." else echo "Install keepalived failed ,please check install version !" exit 0 fi DIR=/usr/local/ ;cp $DIR/etc/rc.d/init.d/keepalived/etc/rc.d/init.d/ ; cp $DIR/etc/sysconfig/keepalived /etc/sysconfig/ ; mkdir -p /etc/keepalived ; cp $DIR/sbin/keepalived /usr/sbin/ Nginx、Keepalived软件安装完毕，接下来进行详细配置。 四、配置Keepalived：两台服务器端keepalived.conf内容都为如下，都设置为backup，不抢占，注意修改优先级不同：! 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 } vrrp_script chk_nginx { script "/data/sh/check_nginx.sh" interval 2 weight 2 } # VIP1 vrrp_instance VI_1 { state BACKUP interface eth0 lvs_sync_daemon_inteface eth0 virtual_router_id 151 priority 100 advert_int 5 nopreempt authentication { auth_typePASS auth_pass1111 } virtual_ipaddress { 192.9.117.162 } track_script { chk_nginx } } 如上配置，我们需要自己建立check_nginx脚本，以方便检查本地Nginx是否存活更好的切换。Check_nginx.sh脚本内容如下：#!/bin/bash #auto check nginxprocess #2012-10-16 wugk killall-0 nginx if [[ $? -ne 0 ]];then /etc/init.d/keepalived stop fi 五、Nginx 配置：在两台Nginx服务器分别新建index.html测试页面，然后启动Nginx服务测试。访问VIP
Down掉192.9.117.160的Nginx服务，分别查看keepalived后台日志和ping VIP日志如下：Oct 16 16:47:48 localhost Keepalived: Stopping Keepalived v1.2.1 (10/16,2012)Oct 16 16:47:49 localhost Keepalived_vrrp: Terminating VRRP child process on signal
至此，Nginx+Keepalived高可用WEB架构搭建成功！欢迎多交流！ 沙发！沙发! 学海无涯，回头是岸! 精典之极就是精斑!!! 丑，但是丑的特别，也就是特别的丑！ 我本非随便的人，但如果你想随便，那我就随你的便好啦！ 我在马路边丢了一分钱
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