一、基本安装
1、基本环境：
CentOS7
keepalived-1.3.4.tar.gz
2、安装前需要的环境：
wget、gcc、pcre、openssl、zlib
在之前的Nginx安装教程中已指明怎么安装这些环境。在此不在赘述。
3、正式安装
进入下载目录：cd /usr/local/src
①下载keepalived：
wget http://www.keepalived.org/software/keepalived-1.3.4.tar.gz
②解压缩：
tar -zxvf keepalived-1.3.4.tar.gz
③进行configure配置，指定安装目录：
cd keepalived-1.3.4 && ./configure-prefix=/usr/local/keepalived-1.3.4
④编译安装：
make && make install
二、环境配置
安装完成后，进入安装目录的etc目录，将keepalived相应的配置文件拷贝到系统默认的目录中。keepalived启动时会从/etc/keepalived目录下查找keepalived.conf配置文件，但/etc目录下默认是没有keepalived目录的。因此需要手动创建。
①在/etc目录下创建keepalived目录：
cd /etc/ && mkdir keepalived
②将路径为/usr/local/src/keepalived-1.3.4/keepalived/etc/init.d的文件keepalived拷贝到/etc/init.d下：（解压缩路径）
cp /usr/local/src/keepalived-1.3.4/keepalived/etc/init.d/keepalived /etc/init.d/keepalived
③将路径为/usr/local/keepalived-1.3.4/etc/sysconfig/keepalived的文件拷贝到 /etc/sysconfig/keepalived（安装路径）
cp/usr/local/keepalived-1.3.4/etc/sysconfig/keepalived /etc/sysconfig/keepalived
④修改网卡接口以及vip（查看网卡接口命令为ip addr）
vim /usr/local/keepalived-1.3.4/etc/keepalived/keepalived.conf
⑤将路径为/usr/local/keepalived-1.3.4/etc/keepalived/keepalived.conf 的文件拷贝到/etc/keepalived/keepalived.conf
cp/usr/local/keepalived-1.3.4/etc/keepalived/keepalived.conf/etc/keepalived/keepalived.conf
⑥去除执行权限：
cd/etc/init.d/ && chmod +x keepalived
⑦建立可执行文件链接：
ln -s/usr/local/keepalived-1.3.4/sbin/keepalived /usr/bin/
⑧启动keepalived
service keepalived start
启动过程中可能会出现下列错误：
执行命令：
systemctl daemon-reload
再次执行service keepalived start。keepalived成功启动
⑨查看执行状态
service keepalived status
可以看到keepalived运行正常，并且已经成功绑定VIP到网卡ens33
查看网卡是否绑定了VIP
ip a
⑩设置开机自启：
chkconfig keepalived on
常用命令总结：
启动：service keepalived start
查看状态：service keepalived status
停止：service keepalived stop
重启：service keepalived restart