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