昊鼎王五：如何十分钟内在CentOS7上快速搭建集群mysql双主+keepavlied实现漂移、高可用服务之3:搭建keepalived双机热备

在上一篇文章《昊鼎王五：如何十分钟内在CentOS7上快速搭建集群mysql双主+keepavlied实现漂移、高可用服务之2:构建主主（互为主从）同步关系》(https://blog.csdn.net/haoding205/article/details/81481492)我们中已经实现了MYSQL双主从同步关系的建立，而且实时同步了。本节主要讲“如何构建keepalived双机热备”。

为了让脉络清晰，阅读方便，本篇的重点内容是：“3:搭建keepalived双机热备”。
这里写图片描述

假设：
node1机器：192.168.1.101
node2机器：192.168.1.102
VIP(VirtualIP):192.168.1.103

一、安装依赖包：

yum install -y epel-release.noarch
yum install gcc gcc-c++ patch bc openssl openssl-devel bzip2 zlib-devel unzip -y

二、获取安装包并解压

cd /root/soft/
ll
tar xf keepalived-1.4.3.tar.gz

三、编译安装keepalived

cd /root/soft/keepalived-1.4.3/
ll
./configure --prefix=/hd205/services/keepalived
make -j 8
make
make install

四、配置keepalived自启动

ln -svf /hd205/services/keepalived/sbin/keepalived /usr/sbin/
cp /hd205/services/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp -r /hd205/services/keepalived/etc/keepalived/ /etc/
cp /root/soft/keepalived-1.4.3/keepalived/etc/init.d/keepalived /etc/rc.d/init.d/
chkconfig keepalived on
chkconfig
systemctl list-unit-files | grep keepalived

五、配置keepalived的VIP及进程自检

cd /etc/keepalived/
ll
cp keepalived.conf keepalived.conf-bak
vim keepalived.conf              #可在文末下载
mkdir /scripts
cd /scripts/
ll
vim keepalived_backup.sh        #可在文末下载
vim keepalived_chk.sh           #可在文末下载
vim keepalived_master.sh        #可在文末下载
vim keepalived_stop.sh          #可在文末下载

cd /scripts/
chmod +x *.sh