mysql主从复制配置

最新推荐文章于 2025-09-20 17:48:07 发布

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主库从库的mysql版本必须一样。

1.主库的my.cnf配置文件如下：

[mysqld]
user = mysql
log_timestamps = SYSTEM
basedir = /usr/local/mysql
datadir = /data/mysql_data
pid-file = /data/mysql_data/mysql.pid
socket = /data/mysql_data/mysql.sock
port = 3306
character-set-server= utf8
sql_mode = NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
max_connections = 1000
max_connect_errors = 1000
open_files_limit = 65535
wait_timeout= 1800
max_user_connections = 1000

innodb_buffer_pool_size = 2G
innodb_log_buffer_size = 64M
innodb_log_file_size = 500M
table_open_cache = 1024

log-bin = /data/mysql_data/mysql_bin_log/mysql-bin
binlog_format = row
expire_logs_days = 30
server_id = 42   #必须与从库不一致


binlog-ignore-db=information_schema #排除同步数据库
binlog-ignore-db=performance_schema  #排除同步数据库
binlog-ignore-db=mysql   #排除同步数据库
#binlog-do-db=xunyundb

log_error = /data/mysql_data/mysql-error.log

default-storage-engine = INNODB

[client]
port=3306
socket= /data/mysql_data/mysql.sock

2.备库的my.cnf配置文件如下：

[mysqld]
user = mysql
log_timestamps = SYSTEM
basedir = /usr/local/mysql
datadir = /data/mysql_data
pid-file = /data/mysql_data/mysql.pid
socket = /data/mysql_data/mysql.sock
port = 3306
character-set-server= utf8
sql_mode = NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
max_connections = 1000
max_connect_errors = 1000
open_files_limit = 65535
wait_timeout= 1800
max_user_connections = 1000

innodb_buffer_pool_size = 10G
innodb_log_buffer_size = 64M
innodb_log_file_size = 1000M
table_open_cache = 1024

log-bin = /data/mysql_data/mysql_bin_log/mysql-bin
binlog_format = row
expire_logs_days = 30
server_id = 50   #必须与主库不一致

relay_log=/data/mysql_data/mysql-relay     #指定relay日志地址
relay-log-index=/data/mysql_data/relay-log.index   #指定relay日志地址


log_error = /data/mysql_data/mysql-error.log

default-storage-engine = INNODB

[client]
port=3306
socket= /data/mysql_data/mysql.sock

3.在主库上建同步的账户，并授权

CREATE USER 'rep'@'192.168.1.150' IDENTIFIED BY 'rep123';
grant replication slave on *.* to 'rep'@'192.168.1.150' ;

4. 查看当前主库的binlog

mysql> show master status;
+------------------+----------+--------------+---------------------------------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB                            | Executed_Gtid_Set |
+------------------+----------+--------------+---------------------------------------------+-------------------+
| mysql-bin.000006 |      609 |              | information_schema,performance_schema,mysql |                   |
+------------------+----------+--------------+---------------------------------------------+-------------------+
1 row in set (0.00 sec)

5. 在从库配置同步信息

CHANGE MASTER TO
MASTER_HOST='192.168.1.146',  #主库地址
MASTER_USER='rep',    #同步账户
MASTER_PASSWORD='rep123',
MASTER_LOG_FILE='mysql-bin.000006',   #查询出来的binlog信息
MASTER_LOG_POS=609,
master_port=3306;

6.打开slave，并查看同步状态

mysql> start slave;
Query OK, 0 rows affected (0.00 sec)

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.146
                  Master_User: rep
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000006
          Read_Master_Log_Pos: 1240
               Relay_Log_File: mysql-relay.000006
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000006
             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: 1240
              Relay_Log_Space: 689
              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: 42
                  Master_UUID: c6368fc6-b99e-11ec-8e01-005056b65858
             Master_Info_File: /data/mysql_data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
           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
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)