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_64
- Nginx版本:nginx v1.2.4
- Keepalived版本:keepalived v1.2.1
- Nginx-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_pass 1111 } 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 nginx process #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 http://192.9.117.162 如下:
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!目前此套系统已经在线上使用,后期会观察使用情况并分享给大家,欢迎多交流!
暂无评论
写评论