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 STATUSG;
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
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 STATUSG;
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

mysql> SHOW PROCESSLISTG;
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

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)