MySQL 5.7 主从数据库搭建

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1. 数据库安装

安装 MySQL5.7，主数据库为 192.168.2.221，从数据库为 192.168.2.222，服务器内存 8G

sudo apt-get install mysql-server

2. 主数据库配置

修改 /etc/mysql/my.cnf
#master
[mysqld]
#common
port = 3306
bind-address = 0.0.0.0
skip-name-resolve
max_connections = 512
#replicate
server_id = 1
#replicate database
binlog-do-db = test
log_bin = mysql-bin
#innodb
innodb_buffer_pool_size = 6G
innodb_flush_method = O_DIRECT
innodb_log_buffer_size = 16M
innodb_log_file_size = 2G
innodb_log_files_in_group = 2
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
进入数据库，添加同步用户
shell>mysql -uroot -p
mysql>create user‘repl’@’%’identified by‘password’;
mysql>grant replication slave on * . * to‘repl’@’%’;
记录 master 信息，File 和 Position
mysql>show master status\G
***************** 1. row *****************
File: mysql-bin.000001
Position: 154
Binlog_Do_DB: test
Binlog_Ignore_DB:
Executed_Gtid_Set:
重启数据库
sudo /etc/init.d/mysql restart

3. 从数据库配置

修改 /etc/mysql/my.cnf
#slave
[mysqld]
#common
port = 3306
bind-address = 0.0.0.0
skip-name-resolve
max_connections = 512
#replicate
server_id = 2
#replicate database
replicate-do-db = test
#innodb
innodb_buffer_pool_size = 6G
innodb_flush_method = O_DIRECT
innodb_log_buffer_size = 16M
innodb_log_file_size = 2G
innodb_log_files_in_group = 2
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
配置 slave
shell>mysql -uroot -p
mysql>change master to master_host =’192.168.2.221’,master_port=3306,master_user=’repl’,master_password=’password’,master_log_file=’mysql-bin.000001’,master_log_pos=154;
mysql>start slave;
重启数据库
shell>sudo /etc/init.d/mysql restart
shell>mysql -uroot -p
mysql>show slave status\G;
***************** 1. row *****************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.2.221
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000006
Read_Master_Log_Pos: 84848971
Relay_Log_File: database-2-relay-bin.000018
Relay_Log_Pos: 84849184
Relay_Master_Log_File: mysql-bin.000006
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: test
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: 84848971
Relay_Log_Space: 84849443
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: afa582dc-2628-11e6-9226-408d5ce1124f
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 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:
连接成功