一.工作环境及条件
主数据库1(master1):172.25.0.254
主数据库2(master2):172.25.0.11
操作系统:RHRL7
MySQL版本:mariadb-5.5.35
安装MYSQL(yum源安装)
master1
[root@master1 ~]# yum clean all
[root@master1 ~]# yum -y install mariadb*
master2
[root@master2 ~]# yum clean all
[root@master2 ~]# yum -y install mariadb*
开启mariadb服务
[root@master1 ~]# systemctl start mariadb
[root@master2 ~]# systemctl start mariadb
关闭防火墙(或者开发防火墙的mysql服务和3306端口)
[root@master1 ~]# systemctl stop firewalld.service
[root@master2 ~]# systemctl stop firewalld.service
二.配置方法
master1
修改主库my.cnf主要设置个不一样的ID,以及同步的数据库的名字和端口号
[root@master1 ~]# vim /etc/my.cnf
server-id=1
log-bin=lhb
port=3306
重启服务使配置生效
[root@master1 ~]# systemctl restart mariadb
登录主库赋予从库权限账号,允许用户在主库上读取日志(用户名:admin,密码:123456)
[root@master1 ~]# mysql -uroot -p123456
MariaDB [(none)]> grant replication slave on *.* to 'admin'@'172.25.0.11' identified by '123456';
我们可以在master2的主机上用命令作如下去验证下是否可以进入master1的MySQL
[root@master2 ~]# mysql -uadmin -p'123456' -h 172.25.0.254
显示主数据看的信息
MariaDB [(none)]> show master status;
+------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------+----------+--------------+------------------+
| lhb.000002 | 245 | | |
+------------+----------+--------------+------------------+
1 row in set (0.00 sec)
设置同步
MariaDB [(none)]> slave stop;
Query OK, 0 rows affected, 1 warning (0.00 sec)
MariaDB [(none)]> change master to master_host='172.25.0.11',master_user='admin',master_password='123456',master_log_file='lhb.000002',master_log_pos=245;
Query OK, 0 rows affected (0.03 sec)
master2
修改主库my.cnf主要设置个不一样的ID,以及同步的数据库的名字和端口号
[root@master2 ~]# vim /etc/my.cnf
server-id=2
log-bin=lhb
port=3306
重启服务使配置生效
[root@master2 ~]# systemctl restart mariadb
登录主库赋予从库权限账号,允许用户在主库上读取日志(用户名:admin,密码:123456)
[root@master2 ~]# mysql -uroot -p123456
MariaDB [(none)]> grant replication slave on *.* to 'admin'@'172.25.0.254' identified by '123456';
我们可以在master1的主机上用命令作如下去验证下是否可以进入master1的MySQL
[root@master1 ~]# mysql -uadmin -p'123456' -h 172.25.0.11
显示主数据看的信息
MariaDB [(none)]> show master status;
+------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------+----------+--------------+------------------+
| lhb.000002 | 245 | | |
+------------+----------+--------------+------------------+
1 row in set (0.00 sec)
设置同步
MariaDB [(none)]> slave stop;
MariaDB [(none)]> change master to master_host='172.25.0.254',master_user='admin',master_password='123456',master_log_file='lhb.000002',master_log_pos=245;
在master1 和master2 两个主机同时敲下
MariaDB [(none)]> slave start;
查看是否成功
MariaDB [(none)]> show slave status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
两个为Yes表示成功(两台主机都需要查看)
测试:在master1建立lhbdb的数据库,看看在master2是否会同步
master1
MariaDB [(none)]> create database lhbdb;
Query OK, 1 row affected (0.00 sec)
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| lhbdb |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.01 sec)
master2
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| lhbdb |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.01 sec)
由此可以看到master2 能够到看lhbdb的数据库,表示MySQL主主搭建成功^_^^_^^_^!!!