db01 172.21.0.10
db02 172.21.0.14
一、安装数据库看上一遍博客
修改配置文件 db01 172.21.0.10
[root@VM_0_10_centos mysql]# cat /etc/my.cnf [mysqld] port=3306 character-set-server=utf8 basedir=/usr/local/mysql datadir=/usr/local/mysql/data #innodb_buffer_pool_size=8M max_connections=1000 slow_query_log = 1 slow_query_log_file=/usr/local/mysql/log/mysql_slow_query.log long_query_time = 5 max_connections=1000 log-bin=/usr/local/mysql/log_bin/mysql-bin.log # 开启二进制日志 binlog_format=mixed server-id = 1 auto_increment_increment=2 # 步进值auto_imcrement。一般有n台主 MySQL 就填n auto_increment_offset=1 # 起始值。一般填第n台主MySQL。此时为第一台主MySQL replicate-do-db=schneider # 要同步的数据库，默认所有库 expire_logs_days=180 #binlog过期清理时间 max_binlog_size=512m #binlog每个日志文件大小 replicate-do-db=schneider # 要同步的数据库，默认所有库 [mysqld_safe] log-error=/usr/local/mysql/data/error.log pid-file=/usr/local/mysql/data/mysql.pid tmpdir=/usr/local/mysql/tmp [client] default-character-set=utf8 [mysql] default-character-set=utf8
修改配置文件 db01 172.21.0.14
[root@VM_0_14_centos log_bin]# cat /etc/my.cnf [mysqld] port=3306 character-set-server=utf8 basedir=/usr/local/mysql datadir=/usr/local/mysql/data #innodb_buffer_pool_size=8M max_connections=1000 slow_query_log = 1 slow_query_log_file=/usr/local/mysql/log/mysql_slow_query.log long_query_time = 5 max_connections=1000 log-bin=/usr/local/mysql/log_bin/mysql-bin.log # 开启二进制日志 binlog_format=mixed server-id = 2 #id 不能一样 auto_increment_increment=2 # 步进值auto_imcrement。一般有n台主 MySQL 就填n auto_increment_offset=2 # 起始值。一般填第n台主MySQL。此时为第一台主MySQL replicate-do-db=schneider # 要同步的数据库，默认所有库 expire_logs_days=180 #binlog过期清理时间 max_binlog_size=512m #binlog每个日志文件大小 replicate-do-db=schneider # 要同步的数据库，默认所有库 [mysqld_safe] log-error=/usr/local/mysql/data/error.log pid-file=/usr/local/mysql/data/mysql.pid tmpdir=/usr/local/mysql/tmp [client] default-character-set=utf8 [mysql] default-character-set=utf8
二、互换主从 注意需要锁表 或者停库
db01 172.21.0.10
# 创建用户 并授权 CREATE USER 'mysq114'@'172.21.0.14' IDENTIFIED BY '123456'; GRANT REPLICATION SLAVE ON *.* TO 'mysq114'@'172.21.0.14' IDENTIFIED BY '123456'; FLUSH PRIVILEGES; mysql> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000002 | 154 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)
# 告诉bin-log位置 在db02 172.21.0.14 执行
CHANGE MASTER TO MASTER_HOST='172.21.0.10', MASTER_USER='mysq114', MASTER_PASSWORD='123456', MASTER_LOG_FILE='mysql-bin.000003', MASTER_LOG_POS= 154;
db02 172.21.0.14
CREATE USER 'mysql10'@'172.21.0.10' IDENTIFIED BY '123456'; GRANT REPLICATION SLAVE ON *.* TO 'mysql10'@'172.21.0.10' IDENTIFIED BY '123456'; FLUSH PRIVILEGES; mysql> show master status; +------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000002 | 154 | | | | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)
# 告诉bin-log位置 在db01 172.21.0.10 执行
CHANGE MASTER TO MASTER_HOST='172.21.0.14', MASTER_USER='mysql10', MASTER_PASSWORD='123456', MASTER_LOG_FILE='mysql-bin.000003', MASTER_LOG_POS= 154;
三、查看结果
db1 和db2 都执行 start slave;
db01 172.21.0.10
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.21.0.14
Master_User: mysql10
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 474
Relay_Log_File: VM_0_10_centos-relay-bin.000006
Relay_Log_Pos: 687
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: schneider
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: 474
Relay_Log_Space: 1069
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: 2
Master_UUID: 9e57cecc-d148-11e9-92db-5254007bbb3c
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)
db02 172.21.0.14
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 172.21.0.10
Master_User: mysq114
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000004
Read_Master_Log_Pos: 355
Relay_Log_File: VM_0_14_centos-relay-bin.000005
Relay_Log_Pos: 568
Relay_Master_Log_File: mysql-bin.000004
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: schneider
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: 355
Relay_Log_Space: 950
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: 9a3346c4-d148-11e9-a4f1-525400857720
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)
四、最后测试是否同步
来源：https://www.cnblogs.com/zhaojingyu/p/11482065.html