1. master机器
1.1 配置文件
[mysqld]
basedir=/qqc_data/mysql
datadir=/qqc_data/mysql/data
socket=/tmp/mysql.sock
user=mysql
log_error=/var/log/mysql.log
log_bin=/qqc_data/mysql/data/mysql-bin # 从库根据这里的日志文件同步
server-id=100 # 与从库不能重复
max_allowed_packet = 500M
binlog-do-db = tb_test # 要同步的库名
#skip-networking
innodb_flush_log_at_trx_commit=1
sync_binlog=1
# 重启mysql
1.2 创建用户
GRANT REPLICATION SLAVE ON *.* TO 'rep'@'%' IDENTIFIED BY 'replpassword';
到slave 机器上测试：
[root@localhost ~]# mysql -h47.102.138.171 -urep -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 7
Server version: 5.7.20-log MySQL Community Server (GPL)
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql>
1.3 获取bin-log和位置信息
# 将所有数据刷进磁盘，并阻塞所有的写入操作
# 如果master本来已存在数据，先将数据导出，执行此命令
mysql> FLUSH TABLES WITH READ LOCK;
Query OK, 0 rows affected (0.00 sec)
mysql> SHOW MASTER STATUS;
+------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000029 | 154 | tb_test | | |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
# 主库数据备份 （主数据库为空库时，忽略此操作）
mysqldump -h**** -uroot -p***** test > /tmp/test.sql
# 将数据导入到从库
source /tmp/test.sql
# 获取文件位置,bin-log信息释放锁
mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)
2. slave 机器配置
2.1 配置文件
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
symbolic-links=0
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
server-id=666 # 不能与主库一致
replicate-do-db = tb_test
# 重启mysql
[root@localhost ~]# systemctl restart mysqld
2.2 从库复制
mysql> stop slave;
Query OK, 0 rows affected (0.01 sec)
mysql> change master to
-> master_host="47.102.138.171",master_user="rep",master_password="***",master_port=3306,
-> master_log_file="mysql-bin.000029",master_log_pos=154;
Query OK, 0 rows affected, 2 warnings (0.16 sec)
mysql> start slave;
Query OK, 0 rows affected (0.06 sec)
2.3 查看salve库状态
mysql> show slave statusG;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 47.102.138.171
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000029
Read_Master_Log_Pos: 154
Relay_Log_File: localhost-relay-bin.000002
Relay_Log_Pos: 320
Relay_Master_Log_File: mysql-bin.000029
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: tb_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: 154
Relay_Log_Space: 531
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: 100
Master_UUID: 5ee1aade-d617-11ea-844c-00163e0c1278
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:
1 row in set (0.00 sec)
注： Slave_IO_Running 与 Slave_SQL_Running 为yes即成功
2.4 数据测试
到主库新建表：
mysql> CREATE TABLE `logs` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'id', `type_id` VARCHAR(64) NOT NULL default '' COMMENT '操作类型id', `log_type` int(11) NOT NULL default 0 COMMENT '日志类型', `role` int(11) NOT NULL default 0 COMMENT '角色', `operator_id` int(11) NOT NULL default 0 COMMENT '操作人id', `operator` VARCHAR(64) NOT NULL DEFAULT '' COMMENT '操作人', `content` VARCHAR(256) NOT NULL default '' COMMENT '内容', `state` int(6) NOT NULL default 0 COMMENT '记录状态, 0-有效; 1-临时记录; 9-删除', `create_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `update_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (id), KEY (type_id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='日志表';
Query OK, 0 rows affected (0.02 sec)
mysql> show tables;
+-------------------+
| Tables_in_tb_test |
+-------------------+
| logs |
+-------------------+
1 row in set (0.00 sec)
从库查看：
mysql> use tb_test;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> show tables;
+-------------------+
| Tables_in_tb_test |
+-------------------+
| logs |
+-------------------+
1 row in set (0.00 sec)
mysql> select * from logs;
+----+---------+----------+------+-------------+----------+--------------------+-------+---------------------+---------------------+
| id | type_id | log_type | role | operator_id | operator | content | state | create_time | update_time |
+----+---------+----------+------+-------------+----------+--------------------+-------+---------------------+---------------------+
| 1 | 22 | 4 | 1 | 33 | test | 测试主从同步 | 0 | 2020-09-01 11:15:33 | 2020-09-01 11:15:33 |
+----+---------+----------+------+-------------+----------+--------------------+-------+---------------------+---------------------+
1 row in set (0.00 sec)