摘要 Keepalived 主页
http://www.keepalived.org/
nginx主页
http://nginx.org/
用Keepalived来实现HA功能,实现主从互备,通过VIP来进行切换,nginx来进行对realserver的七层负载均衡或者是cache功能,或者realserver直接对外,通过DNS对VIP进行轮训。
VIP:192.18.1.222
nginx_master:192.18.1.36
nginx_slave:192.18.1.37
下面开始安装keepalived
wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
#tar zxvf keepalived-1.1.15.tar.gz
#cd keepalived-1.1.15
#./configure && make && make install
#find / -name keepalived # 查看keepalived位置
#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
#cp /usr/local/sbin/keepalived /usr/sbin/
#service keepalived start|stop #做成系统启动服务方便管理.
下面进行keepalived进行配置,拿两台机器进行主从互备配置nginx_master and nginx_slave
Keepalived 主页
http://www.keepalived.org/
nginx主页
http://nginx.org/
用Keepalived来实现HA功能,实现主从互备,通过VIP来进行切换,nginx来进行对realserver的七层负载均衡或者是cache功能,或者realserver直接对外,通过DNS对VIP进行轮训。
VIP:192.18.1.222
nginx_master:192.18.1.36
nginx_slave:192.18.1.37
下面开始安装keepalived
wget http://www.keepalived.org/software/keepalived-1.1.15.tar.gz
#tar zxvf keepalived-1.1.15.tar.gz
#cd keepalived-1.1.15
#./configure && make && make install
#find / -name keepalived # 查看keepalived位置
#cp /usr/local/etc/rc.d/init.d/keepalived /etc/rc.d/init.d/
#cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
#mkdir /etc/keepalived
#cp /usr/local/etc/keepalived/keepalived.conf /etc/keepalived/
#cp /usr/local/sbin/keepalived /usr/sbin/
#service keepalived start|stop #做成系统启动服务方便管理.
下面进行keepalived进行配置,拿两台机器进行主从互备配置nginx_master and nginx_slave
nginx_master配置
05 |
notification_email_from keepalived @arezone.cn |
07 |
smtp_connect_timeout 30 |
11 |
vrrp_instance VI_120 { |
nginx_slave的keepalived.conf配置文件
05 |
notification_email_from keepalived @arezone.cn |
07 |
smtp_connect_timeout 30 |
启动keepalived ,ip a 进行查看vip,查看系统日志,有问题解决问题,没问题当然更好,至此keepalived配置完毕。
nginx配置我在这里就不多说了,网上一搜一大堆。此配置我们已经在线上跑了半年多没出过问题,而且很稳定,
简单总结,当nginx_master down机时,192.168.1.36会自动切换到nginx_slave上,当nginx_slave down机时,192.168.1.37会自动切换到nginx_master上,期间不会影响到服务,keepalived切换速度非常快,linux下ping可能会出现丢一个包的情况,一般都是有一跳延迟大一些,但不会丢包,好了先罗嗦到这.