Centos7 下配置mysql5.6主从复制实例(一主两从)
Centos7默认使用的是MariaDB,要想安装Mysql,需要先卸载掉MariaDB,防止冲突。
1:安装mysql数据库
规划:
主:server-1---10.64.5.167
从:server-2---10.64.5.170
从:server-3---10.64.5.172
数据目录:/var/lib/mysql
添加yum源:
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#wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm #rpm -ivh mysql-community-release-el7-5.noarch.rpm |
安装包:
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#yum install mysql |
mysql-community-common-5.6.27-2.el7.x86_64
mysql-community-libs-5.6.27-2.el7.x86_64
mysql-community-server-5.6.27-2.el7.x86_64
mysql-community-client-5.6.27-2.el7.x86_64
自启动:
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#systemctl enable mysqld |
2:配置mysql主库
主:server-1 10.64.5.167
(1)配置创建需要同步的数据库cattle。
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#mysql mysql>CREATEDATABASE IF NOT EXISTS cattle COLLATE= 'utf8_general_ci' CHARACTER SET= 'utf8' ; mysql>GRANT ALL ON cattle.*TO 'cattle' @ '%' IDENTIFIED BY 'cattle' ; mysql>GRANT ALL ON cattle.*TO 'cattle' @ 'localhost' IDENTIFIED BY 'cattle' ; |
(2)创建用户
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mysql> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO slave1@ '10.64.5.170' IDENTIFIED BY '123456' ; mysql> GRANT REPLICATION SLAVE,RELOAD,SUPER ON *.* TO slave2@ '10.64.5.172' IDENTIFIED BY '123456' ; mysql> flush privileges; |
(3)配置文件
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#vim /etc/my.cnf 添加 server- id = 1 log-bin=mysql-bin log-slave-updates binlog- do -db=cattle binlog-ignore-db=mysql |
重启mysql
(4)锁主库表
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mysql> FLUSH TABLES WITH READ LOCK; |
(4)显示主库信息
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mysql> SHOW MASTER STATUS; |
(5)另开一个终端,打包主库
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#cd /var/lib/mysql #tar czvf cattle.tar.gz cattle |
(6)解锁主库表
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mysql> UNLOCK TABLES; |
3:配置mysql从库
从:server-2 10.64.5.170
从:server-3 10.64.5.172
(1)将cattle.tar.gz 传输到slav机器
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#mv cattle.tar.gz /var/lib/mysql/ #cd /var/lib/mysql/ #tar xf cattle.tar.gz |
(2)查看修改cattle文件夹权限
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#chown -R mysql:mysql cattle |
(3)配置文件
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#vim /etc/my.cnf ------------server-2 添加 server- id =2 log_bin = mysql-bin relay_log = mysql-relay-bin read -only=1 replicate- do -db=cattle log-slave-updates=1 |
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------------server-3 添加 server- id =3 log_bin = mysql-bin relay_log = mysql-relay-bin read -only=1 replicate- do -db=cattle log-slave-updates=1 |
重启slave的mysql
(4)验证连接
从库server-2上测试连接主库
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#mysql -h10.64.5.167 -uslave1 -p123456 mysql> show grants for slave1@10.64.5.170; |
从库server-3上测试连接主库
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# mysql -h10.64.5.167 -uslave2 -p123456 mysql> show grants for slave2@10.64.5.172; |
(5)设置slave复制
查询master的position值
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mysql> SHOW MASTER STATUS\G; *************************** 1. row *************************** File: mysql-bin.000001 Position: 120 Binlog_Do_DB: cattle Binlog_Ignore_DB: mysql 1 row in set (0.00 sec) ERROR: No query specified |
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server-2配置 mysql>CHANGE MASTER TO MASTER_HOST= '10.64.5.167' , -> MASTER_USER= 'slave1' , -> MASTER_PASSWORD= '123456' , -> MASTER_LOG_FILE= 'mysql-bin.000001' , -> MASTER_LOG_POS=120; -------MASTER_LOG_POS为主库的Position |
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server-3配置 mysql>CHANGE MASTER TO MASTER_HOST= '10.64.5.167' , -> MASTER_USER= 'slave2' , -> MASTER_PASSWORD= '123456' , -> MASTER_LOG_FILE= 'mysql-bin.000001' , -> MASTER_LOG_POS=120; |
(6)slave启动
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mysql> START SLAVE; Query OK, 0 rows affected, 1 warning (0.00 sec) |
运行SHOW SLAVE STATUS查看输出结果:
主要查看
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
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mysql> SHOW SLAVE STATUS\G; *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 10.64.5.167 Master_User: slave1 Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000001 Read_Master_Log_Pos: 120 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 178995708 Relay_Master_Log_File: mysql-bin.000001 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: cattle Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 178995562 Relay_Log_Space: 178995864 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 1 row in set (0.00 sec) |
验证master
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mysql> SHOW PROCESSLIST\G; *************************** 1. row *************************** Id: 14 User: system user Host: db: NULL Command: Connect Time: 63424 State: Connecting to master Info: NULL *************************** 2. row *************************** Id: 15 User: system user Host: db: NULL Command: Connect Time: 63424 State: Slave has read all relay log; waiting for the slave I /O thread to update it Info: NULL *************************** 3. row *************************** Id: 25 User: slave1 Host: 10.64.5.170:47139 db: NULL Command: Binlog Dump Time: 62967 State: Master has sent all binlog to slave; waiting for binlog to be updated Info: NULL *************************** 4. row *************************** Id: 244 User: slave2 Host: 10.64.5.172:45629 db: NULL Command: Binlog Dump Time: 53898 State: Master has sent all binlog to slave; waiting for binlog to be updated Info: NULL 16 rows in set (0.00 sec) ERROR: No query specified |
4:验证主从同步
在主库server-1中创建一个表
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mysql> USE cattle; Database changed mysql> CREATE TABLE ` test ` (`name` varchar(10) NULL ,`old` char(10) NULL ); Query OK, 0 rows affected (0.00 sec) mysql> DESC test ; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | name | varchar(10) | YES | | NULL | | | old | char(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.00 sec) |
从库查询是否有这个新表
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mysql> USE cattle; Database changed mysql> DESC test ; +-------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+-------------+------+-----+---------+-------+ | name | varchar(10) | YES | | NULL | | | old | char(10) | YES | | NULL | | +-------+-------------+------+-----+---------+-------+ 2 rows in set (0.01 sec) |
至此,mysql的主从复制完成。
备注: 使用vmware镜像 ,两个mysql的 auto.cnf一样,会报错
进入/var/lib/mysql/ 删除 auto.cnf
报错查看 日志:
cat /var/log/mysql.log