使用Docker搭建MySQL双主热备+Keepalived高可用集群 使用Docker搭建MySQL双主热备+Keepalived高可用集群首先，准备两台Linux主机，并且安装好dockerMaster1:10.122.52.101Master2:10.122.52.102VIP:10.122.52.108第二步，搭建主主集群，这个参考MySQL主主集群搭建的笔记MySQL主主配置实践第三步，开始在Master1服务器上安装Keepalived修改配置文件vi/etc/my.cnf添加如下配置，下面的server-id要保证在这个集群里面的唯一性server-id=1log-bin=mysql-binrelay-log=mysql-relay安装keepalivedyum-yinstallkeepalivedvi/etc/keepalived/keepalived.conf修改配置文件如下:!ConfigurationFileforkeepalivedglobal_defs{router_idMySQL-Master#router_id可以自定义}vrrp_instanceVI_1{stateMASTER#设置为MASTERinterfaceens33#设置为本机的网卡virtual_router_id51priority100#优先级100advert_int1authentication{auth_typePASSauth_pass1111}virtual_ipaddress{10.122.52.108#设置VIP}}virtual_server10.122.52.2013306{#监听VIP3306端口delay_loop6lb_algorrlb_kindDR#使用DR模式轮循net_mask255.255.255.0persistence_timeout50protocolTCPreal_server10.122.52.1013306{#本机MySQL开启3306weight1TCP_CHECK{#健康检查connect_timeout3nb_get_retry3delay_before_retry3connect_port3306#设置连接端口3306}}real_server10.122.52.1023306{#Master2服务器MySQLweight1TCP_CHECK{connect_timeout3nb_get_retry3delay_before_retry3connect_port3306}}}启动keepalivedservicekeepalivedstart第四步，开始在Master2服务器上安装Keepalived修改配置文件vi/etc/my.cnf添加如下配置，下面的server-id要保证在这个集群里面的唯一性server-id=1log-bin=mysql-binrelay-log=mysql-relay安装keepalivedyum-yinstallkeepalivedvi/etc/keepalived/keepalived.conf修改配置文件如下:!ConfigurationFileforkeepalivedglobal_defs{router_idMySQL-Backup}vrrp_instanceVI_1{stateBACKUP#设置为BACKUPinterfaceens33virtual_router_id51priority50advert_int1authentication{auth_typePASSauth_pass1111}virtual_ipaddress{10.122.52.108}}virtual_server10.122.52.1083306{delay_loop6lb_algorrlb_kindDRpersistence_timeout50net_mask255.255.255.0protocolTCPreal_server10.122.52.1013306{weight1TCP_CHECK{connect_timeout3nb_get_retry3delay_before_retry3connect_port3306}}real_server10.122.52.1023306{weight1TCP_CHECK{connect_timeout3nb_get_retry3delay_before_retry3connect_port3306}}}启动Keepalivedservicekeepalivedstart第五步验证验证主主备份的效果分别连接Master1和Master2的MySQL服务器在Master1中创建一个测试的数据库，然后在Master2中查询这个数据库里面的
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，如果存在，则说明它们互为主备。CREATEtablestudents(idintnotnull,namevarchar(100))insertintostudentsvalues(1,'daniel')select*fromstudents验证Keepalived的效果使用VIP连接上MySQL数据库，插入一条记录，然后，在另外两个Master1和Master2的连接中查询，如果都存在，则说明keepalived的VIP正常工作。随意停止一个服务器Master1或者Master2，然后，再使用VIP的连接来插入和查询数据，正常，则说明keepalived正常工作。（注意：当停止的服务器是vip当前连接的Master服务器，则会有几秒的卡顿）参考：/Milend/article/details/107976295 -全文完-
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