keepalived安装

keepalive 安装

https://www.keepalived.org/download.html

#环境安装
yum -y install kernel-devel* openssl-* popt-devel lrzsz openssh-clients libnl libnl-devel popt

#将keepalived-2.0.10.tar.gz上传到服务器/usr/local/下。
cd   /usr/local
tar -zxvf keepalived-2.0.10.tar.gz
cd keepalived-2.0.10
#执行配置命令
./configure --prefix=/usr/local/keepalived
#编译
make
#安装
make install

配置开机启动

#拷贝执行文件 
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
#将init.d文件拷贝到etc下,加入开机启动项 (错误:缺少rc.d 目录,1.2版本之后,这个目录编译后不再出现放在源码包里面)
cp /usr/local/keepalived-2.0.10/keepalived/etc/init.d/keepalived /etc/init.d/keepalived
#将keepalived文件拷贝到etc下，加入网卡配置 
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ 
#创建keepalived文件夹 
mkdir -p /etc/keepalived
#将keepalived配置文件拷贝到etc下 
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf
#添加可执行权限 
chmod +x /etc/init.d/keepalived
#加入开机启动：
chkconfig --add keepalived    #添加时必须保证/etc/init.d/keepalived存在
chkconfig keepalived on
#添加完可查询系统服务是否存在：
chkconfig --list

启动

#启动
service keepalived start
#停止
service keepalived stop
#重启
service keepalived restart

配置日志文件

#将keepalived日志输出到local0：
vi /etc/sysconfig/keepalived
KEEPALIVED_OPTIONS="-D -d -S 0"

#在/etc/rsyslog.conf里添加:
local0.* /var/log/keepalived.log

#重新启动keepalived和rsyslog服务：
service rsyslog restart 
service keepalived restart

keepalive 主备配置文件

#####主
$ cat keepalived.conf
vrrp_instance VI_1 {
    state MASTER
    interface enp7s0f0
    virtual_router_id 51
    priority 101
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        172.24.8.150
    }
}


####备

vrrp_instance VI_1 {
    state MASTER
    interface enp7s0f0
    virtual_router_id 51
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        172.24.8.150
    }
}

yum 安装的配置

检测docker容器的端口是否正常

# chk_mysql.sh 
#!/bin/bash
counter=$(ss -tanlp |grep "LISTEN"|grep "3306"|wc -l)
if [ "${counter}" -eq 0 ]
then
   systemctl stop  keepalived
else
   echo "running..." >> /opt/keepalived-running-info.log
   #sleep 5000
fi


# 主keepalived 配置文件

! Configuration File for keepalived
global_defs {
   script_user root
   enable_script_security
   router_id keep_89
}
vrrp_script chk_mysql {
       script "/opt/chk_mysql.sh"
       interval 2
       weight -5
       fall 2 
       rise 1
}

vrrp_instance VI_1 {
    state MASTER
    interface ens33
    virtual_router_id 57
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.169.135
    }
    track_script {
      chk_mysql
}
}

# 备keepalived配置文件

! Configuration File for keepalived
global_defs {
   script_user root
   enable_script_security
   router_id keep_88
}
vrrp_script chk_mysql {
       script "/opt/chk_mysql.sh"
       interval 2
       weight -5
       fall 2 
       rise 1
}

vrrp_instance VI_1 {
    state BACKUP
    interface ens33
    virtual_router_id 57
    priority 99
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.169.135
    }
    track_script {
      chk_mysql
}
}

可以参考的连接：
https://www.cnblogs.com/arjenlee/p/9258188.html 优先级策略
https://my.oschina.net/u/2347651/blog/3011012
https://blog.csdn.net/William0318/article/details/99595966 抢占模式
https://blog.csdn.net/harryxxxxx/article/details/81092263
https://www.cnblogs.com/xiaobaozi-95/p/11497295.html
https://www.jianshu.com/p/d9b6bbc7fd77 mysql 容器

镜像拉的慢配置阿里云加速仓库