慕课学习记录_keepalived 安装记录

keepalived 下载地址 

1.解压 tar -zxvf keepalived-2.0.18.tar.gz

2.进入到keepalived解压文件目录

　　./configure --prefix=/usr/local/keepalived --sysconf=/etc

　　prefix：keepalived安装的位置

　　sysconf：keepalived核心配置文件所在位置，固定位置，改成其他位置则keepalived启动不了，/var/log/messages中会报错

3.提示错误信息

　　*** WARNING - this build will not support IPVS with IPv6. Please install libnl/libnl-3 dev libraries to support IPv6 with IPVS.

　　yum -y install libnl libnl-devel 

　　执行后再次执行 ./configure --prefix=/usr/local/keepalived --sysconf=/etc

4.make && make install

5.进入到/etc/keepalived，该目录下为keepalived核心配置文件

　　通过命令 vim keepalived.conf 打开配置文件

　　

 

　　启动服务

　　 

 

　　 ps -ef|grep keepalived

　　

 

 　　查看端口是否启动 ip addr

　　

6.将服务注册到系统中

　　在解压的目录中/home/software/keepalived-2.0.18/keepalived/etc 中 将两个配置文件拷贝到 /etc/ 目录中

　　　　cp init.d/keepalived /etc/init.d/

　　　　cp sysconfig/keepalived /etc/sysconfig/

 

7.系统重启注册服务

　　systemctl daemon-reload

　　systemctl stop / start / restart keepalived.service

8.Centos7 keepalived 防火墙设置

　　firewall-cmd --direct --permanent --add-rule ipv4 filter INPUT 0 --destination 224.0.0.18 --protocol vrrp -j ACCEPT

　　firewall-cmd --direct --permanent --add-rule ipv4 filter OUTPUT 0 --destination 224.0.0.18 --protocol vrrp -j ACCEPT

　　firewall-cmd --reload

 

9.设置keepalived 监听nginx脚本

　　到 /etc/keepalived 目录下执行 vim /etc/keepalived/check_nginx_alive_or_not.sh 创建脚本

　　

 　　对 脚本添加执行权限  chmod +x /etc/keepalived/check_nginx_alive_or_not.sh 

 　　再设置 keepalived的启动实例脚本

　　

 

 　　最后重启keepalived 服务 systemctl restart keepalived

10.双主热备配置实现 131 与 135 两台服务器互为主备关系

　　131 主机 keepalived 配置

　　

 　　135 的keepalived 配置文件配置

　　

 

 　　当131 主机服务down后 161 162 vrrp虚拟IP 会转移到 135服务器上