Mysql主从同步

1. 配置主服务器

# vi /etc/my.cnf

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'
#服务器唯一标识
server_id=1
#二进制日志文件名
log-bin=master-bin
log-bin-index=master-bin.index
port=3306

重新启动主库

# service mysql restart

在主数据库创建一个同步账号授权给从数据库使用

mysql> create user 'rep'@'hadoop4' identified by '123456';
Query OK, 0 rows affected (0.08 sec)

mysql> grant replication slave on *.* to 'rep'@'hadoop4';
Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)

查看主库状态

mysql> show master status;
+-------------------+----------+--------------+----------------------------------------------------------+-------------------+
| File              | Position | Binlog_Do_DB | Binlog_Ignore_DB                                         | Executed_Gtid_Set |
+-------------------+----------+--------------+----------------------------------------------------------+-------------------+
| master-bin.000051 |      824 |              | information_schema,mysql,performance_schema,sonar,zabbix |                   |
+-------------------+----------+--------------+----------------------------------------------------------+-------------------+
1 row in set (0.01 sec)

2. 配置从服务

# vi /etc/my.cnf

[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'
server_id=2
relay-log = slave-relay-bin
relay-log-index = slave-relay-bin.index
port=3306
binlog-ignore-db=information_schema,mysql,performance_schema,sonar,zabbix
binlog_format=ROW

重新启动从库

# service mysql restart

配置并启用主从复制

mysql> change master to 
master_host='hadoop1',
master_user='rep',
master_password='123456',
master_log_file='master-bin.000051',
master_log_pos=824;
Query OK, 0 rows affected, 2 warnings (0.04 sec)

mysql> start slave;
Query OK, 0 rows affected (0.02 sec)

mysql> show slave status \G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: hadoop1
                  Master_User: rep
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000051
          Read_Master_Log_Pos: 824
               Relay_Log_File: slave-relay-bin.000002
                Relay_Log_Pos: 284
        Relay_Master_Log_File: master-bin.000051
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          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: 824
              Relay_Log_Space: 457
              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
                  Master_UUID: 7e9f2269-1ecc-11ec-bbb0-0050563fb2f4
             Master_Info_File: /var/lib/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
1 row in set (0.00 sec)

3. 测试验证

#主库创建数据库ceshi
mysql> create database ceshi;
Query OK, 1 row affected (0.02 sec)

#从库查看
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| ceshi              |
| mysql              |
| performance_schema |
+--------------------+

#主库创建表
mysql> use ceshi;
Database changed
mysql> show tables;
Empty set (0.01 sec)

mysql> CREATE TABLE user(id int not null,name varchar(50)) ;
Query OK, 0 rows affected (0.03 sec)

#从库验证表
mysql> use ceshi;
Database changed
mysql> show tables;
Empty set (0.00 sec)

mysql> show tables;
+-----------------+
| Tables_in_ceshi |
+-----------------+
| user            |
+-----------------+
1 row in set (0.00 sec)