keepalived 双击切换

来源：互联网发布：nodejs access数据库编辑：程序博客网时间：2024/05/24 03:23

用keepalived 来实现一个双节切换

首先下载keepalived 我这边用的是keepalived-1.2.17.tar.gz

准备2台机器安装keepalived 一台做主机一台做备机

在安装nginx前，需要确保系统安装了openssl-devel，否则后面的编译不通过。

yum install openssl-devel

安装

tar xzf keepalived-1.2.17.tar.gz
cd keepalived-1.2.17
./configure
make && make install
cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/
cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/
chmod +x /etc/init.d/keepalived
chkconfig --add keepalived
chkconfig keepalived on
mkdir /etc/keepalived
ln -s /usr/local/sbin/keepalived /usr/sbin/

安装好以后接下来进行配置：

主机的配置文件：

global_defs {   notification_email {     admin@centos.bz   }   notification_email_from keepalived@domain.com   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL}vrrp_script chk_http_port {    script "/home/tomcat/bin/monitor.sh"    interval 3    weight -2}vrrp_instance VI_1 {    state MASTER    interface em1    virtual_router_id 51    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {       192.168.1.240    }    track_script {        chk_http_port    }}

备机配置文件：

global_defs {   notification_email {     admin@centos.bz   }   notification_email_from keepalived@domain.com   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL}vrrp_script chk_http_port {    script "/home/tomcat/bin/monitor.sh"    interval 3    weight -2}vrrp_instance VI_1 {    state BACKUP    interface em1    virtual_router_id 51    priority 99    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {    192.168.1.240}    track_script {        chk_http_port    }}

这样当主机启动的时候虚拟ip240 在主机上面可以用ip addr 观察

如果当主机宕机了则虚拟ip240在备机上可以用ip addr 进行观察

keepalived 里面还可以定时任务的执行自己制定的脚本比如上面的tomcat的监控脚本

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