1：安装mysql5.5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

下载mysql5.5

#wget   http://cdn.mysql.com//Downloads/MySQL-5.5/MySQL-client-5.5.46-1.el7.x86_64.rpm
#wget   http://cdn.mysql.com//Downloads/MySQL-5.5/MySQL-server-5.5.46-1.el7.x86_64.rpm

安装

#rpm -ivh    MySQL-server-5.5.46-1.el7.x86_64.rpm
#rpm -ivh    MySQL-client-5.5.46-1.el7.x86_64.rpm

拷贝配置文件

#cp /usr/share/mysql/my-medium.cnf /etc/my.cnf

自启动：

#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。

#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

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

#vim /etc/my.cnf
添加
server-id = 1
log-bin=mysql-bin
log-slave-updatesbinlog-do-db=cattle
binlog-ignore-db=mysql

重启mysql

（4）锁主库表

mysql> FLUSH TABLES WITH READ LOCK;

（4）显示主库信息

mysql> SHOW MASTER STATUS;

（5）另开一个终端，打包主库

#cd /var/lib/mysql
#tar czvf  cattle.tar.gz cattle

（6）解锁主库表

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

#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

#chown -R mysql:mysql cattle

（3）配置文件

#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

------------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

#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

# 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

mysql> SHOW  MASTER STATUS\G;
*************************** 1. row ***************************File: mysql-bin.000001Position: 120Binlog_Do_DB: cattle
Binlog_Ignore_DB: mysql
1 row in set (0.00 sec)
ERROR:
No query specified

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

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

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

mysql> SHOW SLAVE STATUS\G;
*************************** 1. row ***************************Slave_IO_State: Waiting for master to send eventMaster_Host: 10.64.5.167Master_User: slave1Master_Port: 3306Connect_Retry: 60Master_Log_File: mysql-bin.000001Read_Master_Log_Pos: 120Relay_Log_File: mysql-relay-bin.000002Relay_Log_Pos: 178995708Relay_Master_Log_File: mysql-bin.000001Slave_IO_Running: YesSlave_SQL_Running: YesReplicate_Do_DB: cattleReplicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0Last_Error: Skip_Counter: 0Exec_Master_Log_Pos: 178995562Relay_Log_Space: 178995864Until_Condition: NoneUntil_Log_File: Until_Log_Pos: 0Master_SSL_Allowed: NoMaster_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: NoLast_IO_Errno: 0Last_IO_Error: Last_SQL_Errno: 0Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1
1 row in set (0.00 sec)

验证master

mysql> SHOW  PROCESSLIST\G;
*************************** 1. row ***************************Id: 14User: system userHost: db: NULL
Command: ConnectTime: 63424State: Connecting to masterInfo: NULL
*************************** 2. row ***************************Id: 15User: system userHost: db: NULL
Command: ConnectTime: 63424State: Slave has read all relay log; waiting for the slave I/O thread to update itInfo: NULL
*************************** 3. row ***************************Id: 25User: slave1Host: 10.64.5.170:47139db: NULL
Command: Binlog DumpTime: 62967State: Master has sent all binlog to slave; waiting for binlog to be updatedInfo: NULL
*************************** 4. row ***************************Id: 244User: slave2Host: 10.64.5.172:45629db: NULL
Command: Binlog DumpTime: 53898State: Master has sent all binlog to slave; waiting for binlog to be updatedInfo: 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

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

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。