Linux 下 Keepalived 安装与卸载

keepalived 是一个类似于 layer3, 4 & 7 交换机制的软件，也就是我们平时说的第 3 层、第 4 层和第 7 层交换。Keepalived 的作用是检测 web 服务器的状态，如果有一台 web服务器死机，或工作出现故障，keepalived 将检测到，并将有故障的 web 服务器从系统中剔除，当web服务器工作正常后 keepalived 自动将 web 服务器加入到服务器群中，这些工作全部自动完成，不需要人工干涉，需要人工做的只是修复故障的 web 服务器。

安装

方法一：yum 方式

yum 安装

#安装依赖包

[root@localhost ~]# yum install -y curl gcc openssl-devel libnl3-devel net-snmp-devel

[root@localhost ~]# yum install -y keepalived

初始化及启动

[root@localhost ~]# systemctl start keepalived //启动 keepalived

[root@localhost ~]# systemctl enable keepalived //加入开机启动 keepalived

[root@localhost ~]# systemctl restart keepalived //重新启动 keepalived

[root@localhost ~]# systemctl status keepalived //查看 keepalived 状态

方法二：源码包

官网下载keepalived的最新版本，解压并安装

[root@master local]# pwd

/usr/local

[root@master src]# wget http://www.keepalived.org/software/keepalived-2.0.7.tar.gz

[root@master local]# tar xvf keepalived-2.0.7.tar.gz

[root@master local]# cd keepalived-2.0.7

[root@master keepalived-2.0.7]# ./configure --prefix=/usr/local/keepalived

[root@master keepalived-2.0.7]# make && make install

完成后会在以下路径生成：

/usr/local/etc/keepalived/keepalived.conf

/usr/local/etc/sysconfig/keepalived

/usr/local/sbin/keepalived

初始化及启动

# keepalived 启动脚本变量引用文件，默认文件路径是 /etc/sysconfig/，也可以不做软链接，直接修改启动脚本中文件路径即可（安装目录下）

[root@localhost /]# cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/keepalived

# 将keepalived 主程序加入到环境变量（安装目录下）

[root@localhost /]# cp /usr/local/keepalived/sbin/keepalived /usr/sbin/keepalived

# keepalived 启动脚本（源码目录下），放到 /etc/init.d/ 目录下就可以使用 service 命令便捷调用

[root@localhost /]# cp /usr/local/src/keepalived-2.0.7/keepalived/etc/init.d/keepalived /etc/init.d/keepalived

# 将配置文件放到默认路径下

[root@localhost /]# mkdir /etc/keepalived

[root@localhost /]# cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf

加为系统服务：chkconfig –add keepalived开机启动：chkconfig keepalived on查看开机启动的服务：chkconfig –list启动、关闭、重启 service keepalived start|stop|restart

卸载

卸载keeplived工作路径

[root@localhost /]# cd /usr/local/src/keepalived #源码所在目录（根据实际情况进入对应目录）

[root@localhost keepalived]#make uninstall

删除相关文件

#删除keepalived

[root@localhost /]# rm -f /usr/local/sbin/keepalived

[root@localhost /]# rm -f /usr/local/etc/rc.d/init.d/keepalived

[root@localhost /]# rm -f /usr/local/etc/sysconfig/keepalived

[root@localhost /]# rm -rf /usr/local/etc/keepalived

[root@localhost /]# rm -f /usr/local/bin/genhash

[root@localhost /]# rm -rf /usr/local/keepalived

[root@localhost /]# rm -rf /etc/keepalived

[root@localhost /]# rm -f /etc/rc.d/init.d/keepalived

[root@localhost /]# rm -f /usr/sbin/keepalived

[root@localhost /]# rm -f /etc/sysconfig/keepalived

[root@localhost /]# rm -f /etc/systemd/system/multi-user.target.wants/keepalived.service

测试是否卸载成功

[root@localhost /]# serive keepalived satrt

[root@localhost /]# systemctl start keepalived

当命令无效时，证明卸载成功。

命令

centOs

[root@localhost /]# systemctl start keepalived -- 启动

[root@localhost /]# systemctl stop keepalived --关闭

[root@localhost /]# ps aux|grep keepalived --查看进程

linux

[root@localhost /]# service keepalived start -- 启动

[root@localhost /]# service keepalived stop --关闭

[root@localhost /]# ps aux|grep keepalived --查看进程