Keepalived+Mysql互为主从高可用安装配置
Keepalived+Mysql互为主从高可用安装配置
环境介绍:
keepalived_vip=192.168.1.210 (写虚拟ip)
mysql_master01 eth0:192.168.1.211 eth1:172.20.27.211 (1核1G)
mysql_master02 eth0:192.168.1.212 eth1:172.20.27.212 (1核1G)
1.安装mysql数据库(所有节点安装)
//此处省略安装mysql服务
2.编辑my.cnf配置文件
2.1修改mysql_master01配置文件
vim /usr/local/lnmp/mysql/etc/my.cnf
server_id = 211
2.2修改mysql_master02配置文件
vim /usr/local/lnmp/mysql/etc/my.cnf
server_id = 212
3.搭建互为主从
3.1在mysql_master01上面操作
3.1.1为mysql_master02建立主从同步权限
mysql -u root -p123456 //进入数据库 grant replication slave on *.* to ‘backup‘@‘192.168.1.212‘ identified by ‘backup‘; //建立权限 flush privileges; //刷新权限表
3.1.2拷贝数据到mysql_master02节点
mysql -u root -p123456 //进入数据库 flush tables with read lock; //锁表,准备备份数据 mysql> show master status\G //查看主节点信息 *************************** 1. row *************************** File: mysql-bin.000005 Position: 1231 Binlog_Do_DB: Binlog_Ignore_DB: Executed_Gtid_Set: 1 row in set (0.00 sec) mysqldump -u root -p123456 liu >liu.sql //备份liu这个数据库 mysql -u root -p123456 //进入数据库 unlock tables; //解锁 scp liu.sql [email protected]:/root/ //拷贝数据
3.2在mysql_master02上面操作
3.2.1恢复liu.sql到数据库
mysql -u root -p123456 //进入数据库 create database liu; //创建恢复的数据库名 use liu; //进入数据库 source /root/liu.sql //恢复数据
3.2.2建立主从同步关系
mysql -u root -p123456 //进入数据库 change master to master_host=‘192.168.1.211‘,master_user=‘backup‘,master_password=‘backup‘,master_log_file=‘mysql-bin.000005‘,master_log_pos=1231; //建立主从同步关系 start slave; //启动从库同步 show slave status\G //检查主从同步,如果您看到Slave_IO_Running和Slave_SQL_Running均为Yes,则主从复制连接正常。
3.2.3为mysql_master01建立主从同步权限
mysql -u root -p123456 //进入数据库 grant replication slave on *.* to ‘backup‘@‘192.168.1.211‘ identified by ‘backup‘; //建立权限 flush privileges; //刷新权限表 mysql> show master status\G //查看主节点信息 *************************** 1. row *************************** File: mysql-bin.000004 Position: 1242 Binlog_Do_DB: Binlog_Ignore_DB: Executed_Gtid_Set: 1 row in set (0.00 sec)
3.3在mysql_master01上面操作
3.3.1建立主从同步关系
mysql -u root -p123456 //进入数据库 change master to master_host=‘192.168.1.212‘,master_user=‘backup‘,master_password=‘backup‘,master_log_file=‘mysql-bin.000004‘,master_log_pos=1242; //建立主从同步关系 start slave; //启动从库同步 show slave status\G //检查主从同步,如果您看到Slave_IO_Running和Slave_SQL_Running均为Yes,则主从复制连接正常。
4.安装keepalived(所有节点都安装)
4.1安装配置keepalived
wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz tar zxvf keepalived-1.2.15.tar.gz cd keepalived-1.2.15 ./configure --prefix=/usr/local/keepalived make && make install
4.2将keepalived配置成系统服务
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived/ cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
4.3修改keepalived配置文件
4.3.1修改mysql_master01的keepalived配置文件
echo ‘‘ >/etc/keepalived/keepalived.conf //清空配置文件,自己写 vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id MySQL-ha } vrrp_instance VI_1 { state backup #两台配置此处均是BACKUP interface eth0 virtual_router_id 51 priority 100 #优先级,另一台改为90 advert_int 1 nopreempt #不抢占,只在优先级高的机器上设置即可,优先级低的机器不设置 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.210 } } virtual_server 192.168.1.210 3306 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 50 #会话保持时间 protocol TCP real_server 192.168.1.211 3306 { weight 3 notify_down /usr/local/lnmp/mysql/bin/killkeepalived.sh #检测到mysql服务挂了就执行这个脚本 TCP_CHECK { connect_timeout 10 #连接超时时间 nb_get_retry 3 #重连次数 delay_before_retry 3 #重连间隔时间 connect_port 3306 #健康检查端口 } } }
4.3.2修改mysql_master02的keepalived配置文件
echo ‘‘ >/etc/keepalived/keepalived.conf //清空配置文件,自己写 vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived global_defs { notification_email { [email protected] } notification_email_from [email protected] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id MySQL-ha } vrrp_instance VI_1 { state backup interface eth0 virtual_router_id 51 priority 90 advert_int 1 nopreempt authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.1.210 } } virtual_server 192.168.1.210 3306 { delay_loop 6 lb_algo wrr lb_kind DR persistence_timeout 50 protocol TCP real_server 192.168.1.212 3306 { weight 3 notify_down /usr/local/lnmp/mysql/bin/killkeepalived.sh TCP_CHECK { connect_timeout 10 nb_get_retry 3 delay_before_retry 3 connect_port 3306 } } }
4.4编写killkeepalived.sh(所有节点安装)
vim /usr/local/lnmp/mysql/bin/killkeepalived.sh
#!/bin/sh pkill keepalived
chmod +x /usr/local/lnmp/mysql/bin/killkeepalived.sh
4.5 启动keepalived(所有节点安装)
service keepalived restart echo ‘service keepalived start‘ >>/etc/rc.local
5.测试数据库高可用
5.1为测试用户建立权限
grant all privileges on *.* to ‘liuzhuang‘@‘%‘ identified by ‘123‘; flush privileges; //刷新权限表
5.2模拟故障,看是否关闭一台mysql服务,vip会自动切换,如果会,说明环境正常。
本文出自 “成都@阿状” 博客,请务必保留此出处http://azhuang.blog.51cto.com/9176790/1636594
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