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在mysql 双主互从的基础上#xff0c; 架构图#xff1a; Keepalived有两个主要的功能#xff1a;
提供虚拟IP#xff0c;实现双机热备通过LVS#xff0c;实现负载均衡
安装
# 安装
yum -y install keepalived
# 卸载
…mysql双主互从通过KeepAlived虚拟IP实现高可用
在mysql 双主互从的基础上 架构图 Keepalived有两个主要的功能
提供虚拟IP实现双机热备通过LVS实现负载均衡
安装
# 安装
yum -y install keepalived
# 卸载
yum remove keepalived 修改 keepalived 配置文件
cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.original
vi /etc/keepalived/keepalived.confmaster
keepalived.conf
global_defs {router_id LVS_1script_user root
}vrrp_script check_mysql_port {script /etc/keepalived/check_mysql_port.sh # 脚本存放的位置interval 2 # 每隔两秒运行上一行脚本weight 2
}vrrp_instance VI_1 {# 主机MASTER;备用机BACKUPstate MASTER# 该实例绑定的网卡名称interface ens192# 保证主备节点一致virtual_router_id 148# 权重master值 backup值priority 100# 主备组播报发送间隔时间1秒advert_int 1# 认证权限密码防止非法节点进入authentication {auth_type PASSauth_pass 1111} # 虚拟出来的ip可以有多个vipvirtual_ipaddress {178.119.30.13}# 调用监控脚本track_script {check_mysql_port}
}检测xxx.sh
check_mysql_port.sh
安装killall 命令
# 查询
yum search killall
# 安装对应组件
yum install psmisc -y安装netstat
yum install -y net-tools#!/bin/bash
Anetstat -nltp|grep 3306|wc -l
if [ $A -eq 2 ];
thenecho $host mysql login successfullyexit 0
elseecho mysql login failedkillall keepalivedexit 2
fi修改脚本xxx.sh权限
chmod 777 check_mysql_port.shslave
keepalived.conf
global_defs {router_id LVS_1script_user root
}vrrp_script check_mysql_port {script /etc/keepalived/check_mysql_port.sh # 脚本存放的位置interval 2 # 每隔两秒运行上一行脚本weight 2
}vrrp_instance VI_1 {# 主机MASTER;备用机BACKUPstate BACKUP# 该实例绑定的网卡名称interface ens192# 保证主备节点一致virtual_router_id 148# 权重master值 backup值priority 80# 主备组播报发送间隔时间1秒advert_int 1# 认证权限密码防止非法节点进入authentication {auth_type PASSauth_pass 1111} # 虚拟出来的ip可以有多个vipvirtual_ipaddress {178.119.30.13}# 调用监控脚本track_script {check_mysql_port}
}master VS slave 结果展示
启动keepalived
master slave 停止容器使vip飘移
master slave
systemctl 命令
# 启动 keepalived
systemctl start keepalived # 加入开机启动 keepalived
systemctl enable keepalived # 重新启动 keepalived
systemctl restart keepalived # 查看 keepalived 状态
systemctl status keepalived # 加载配置文件
systemctl daemon-reloadservice VS systemctl
