配置Master與Slave實現主從同步

Mysql版本

通過docker啟動的mysql容器
mysql版本

root@1651d1cab219:/# mysql --version
mysql  Ver 14.14 Distrib 5.6.19-v1, for Linux (x86_64) using  EditLine wrapper

配置Master

Master需要一個唯一性的服務器ID。
一個二進制文件記錄數據的變動。
一個可以讀取二進制文件的mysql賬號。

打開mysql配置文件找到如下內容。

#server-id              = 1
log_bin                 = /etc/mysql/data/mysql-bin.log
expire_logs_days        = 2
max_binlog_size         = 100M
#binlog_do_db           = include_database_name
#binlog_ignore_db       = include_database_name

最后把內容改成如下內容

server-id              = 1
log_bin                 = /etc/mysql/data/mysql-bin.log
log_bin_index           = /etc/mysql/data/mysql-bin.index
expire_logs_days        = 2
max_binlog_size         = 100M
binlog_do_db           = test
binlog_ignore_db       = mysql

重啟mysql 在宿主機器上重啟該mysql容器

重新進入到容器
在mysql的test庫中創建一張測試表
先查看master 二進制位置

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000004 |      121 | test         | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

mysql> reset master;

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      121 | test         | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

說明master配置已經運行

創建 復制賬號

GRANT REPLICATION SLAVE ON *.* TO 'repl_user'@'%' IDENTIFIED BY '';

已經不能在語句上賦值數據庫名稱了，如果需要過濾數據庫需要配置文件的配置項

#binlog_do_db           = include_database_name
#binlog_ignore_db       = include_database_name

分別表示需要記錄的數據庫和不需要記錄的數據庫選項。

配置Slave

在slave服務器mysql的配置文件中添加

server-id              = 2
relay_log_index         = /etc/mysql/data/slave-relay-bin.index
relay_log               = /etc/mysql/data/slave-relay-bin.log

重啟docker容器

連接　Slave到Master

CHANGE MASTER TO MASTER_HOST='172.17.0.2',MASTER_PORT=3306,MASTER_USER = 'repl_user',MASTER_PASSWORD='';
START SLAVE;

Master服務器添加數據

mysql> use test;
Database changed

mysql> CREATE TABLE `a` (
    ->   `id` int(11) NOT NULL AUTO_INCREMENT,
    ->   `name` varchar(16) COLLATE utf8_unicode_ci NOT NULL DEFAULT '',
    ->   PRIMARY KEY (`id`)
    -> ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
Query OK, 0 rows affected (0.11 sec)

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| a              |
+----------------+
1 row in set (0.00 sec)

Slave查看同步結果與狀態

mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| a              |
+----------------+
1 row in set (0.00 sec)

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.17.0.2
                  Master_User: repl_user
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 401
               Relay_Log_File: slave-relay-bin.000002
                Relay_Log_Pos: 565
        Relay_Master_Log_File: mysql-bin.000001
             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: 401
              Relay_Log_Space: 739
              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: 8bb5a52d-5fe2-11e6-841c-0242ac110002
             Master_Info_File: /etc/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           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
1 row in set (0.00 sec)

我們的基本的主從Mysql搭建已經完成。