Linux mysql 5.7.23 主从复制（异步复制）

docker容器主节点： 172.17.0.9 

docker容器子节点： 172.17.0.10

异步复制：

首先确认主库和从库是否一致，最好都是刚刚初始化的干净的数据库

如果主库正在使用不能初始化，就要先将主库的内容复制到从库上再做同步

1、先把master做一个备份，把备份出的文件传给slave

[root@99f856c64c02 /]# mysqldump -uroot -p -B test > test.dump

Enter password: 

[root@72bd50b77c93 data]# mysql -uroot -p

Enter password: 

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 4

Server version: 5.7.23 MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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> source /data/test.dump

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 1 row affected (0.00 sec)

Database changed

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.01 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 1 row affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

Query OK, 0 rows affected (0.00 sec)

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| sys                |

| test               |

+--------------------+

5 rows in set (0.00 sec)

再到slave上将数据恢复

mysql> source /mysql/test3.sql

mysql> show databases;

+--------------------+

| Database           |

+--------------------+

| information_schema |

| mysql              |

| performance_schema |

| test1              |

| test2              |

| test3              |

+--------------------+

6 rows in set (0.00 sec)

2.开启主节点Bin-log日志

vi /etc/my.cnf

添加bin-log配置

server-id=1

log-bin=mysql-bin

binlog_format=row

systemctl restart mysqld

3.创建复制用户，赋予用户权限

mysql> grant replication slave on *.* to 'repl'@'%' identified by 'mysql';

mysql> flush privileges;

mysql> show master status;       要记住position

+------------------+----------+--------------+--------------------------+-------------------+

| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB         | Executed_Gtid_Set |

+------------------+----------+--------------+--------------------------+-------------------+

| mysql-bin.000003 |     683 |              | mysql,information_schema |                   |

+------------------+----------+--------------+--------------------------+-------------------+

1 row in set (0.00 sec)

4.再到slave

mysql>  change master to master_host='172.17.0.9',master_port=3306,master_user='repl',

    ->  master_password='mysql‘’,master_log_file='mysql-bin.000003',master_log_pos=683;

Query OK, 0 rows affected, 2 warnings (0.01 sec)

mysql>  start slave;

Query OK, 0 rows affected (0.09 sec)

mysql> show slave status\G;

*************************** 1. row ***************************

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 172.17.0.9

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: mysql-bin.000003

          Read_Master_Log_Pos: 154

               Relay_Log_File: 72bd50b77c93-relay-bin.000002

                Relay_Log_Pos: 320

        Relay_Master_Log_File: mysql-bin.000003

             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: 154

              Relay_Log_Space: 534

              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: 8ce1a2b2-b01c-11e8-90a0-0242ac11000a

             Master_Info_File: /usr/local/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)

看到两个yes 就基本成功了 可以在主库上进行一些操作来测试一下

5.测试结果：

主库插入数据

[root@99f856c64c02 mysql]# mysql -uroot

Enter password: 

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is 5

Server version: 5.7.23-log MySQL Community Server (GPL)

Copyright (c) 2000, 2018, 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> use 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> select * from t;

+------+------+------+

| id   | name | age  |

+------+------+------+

|    1 | dd   |   10 |

+------+------+------+

1 row in set (0.00 sec)

mysql> insert into t values(2,'2222',11);

Query OK, 1 row affected (0.00 sec)

mysql> 

登录slave数据库

mysql> use 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> select * from t;

+------+------+------+

| id   | name | age  |

+------+------+------+

|    1 | dd   |   10 |

|    2 | 2222 |   11 |

+------+------+------+

2 rows in set (0.00 sec)

mysql> 

mysql> 

mysql>