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MySQL 主从搭建

MySQL 主从搭建

作者: coding400 | 来源:发表于2019-10-09 15:27 被阅读0次

    环境

    两台 Ubuntu 机器

    master

    Ubuntu 16.04.2 LTS 192.168.189.137

    slave

    Ubuntu 16.04.2 LTS 192.168.189.133

    MySQL 版本均为 5.5.62-0ubuntu0.14.04.1

    修改配置

    master 机器中 /etc/mysql/my.conf (其他版本可能在 /etc/mysql/mysql.conf.d/mysqld.cnf )配置添加以下:

    
    # server id 默认 1
    server-id               = 1
    #  开启binlog(二进制日志)         
    log_bin                 = /var/log/mysql/mysql-bin.log
    # 对那些库进行复制
    binlog_do_db            = permission
    # 对那些库进行忽略(多个使用逗号隔开)
    binlog_ignore_db        = mysql
    
    

    slave 机器同理,不过需要设置不同的 server-id

    启动

    1. 启动master 机器的 mysql,并连接
    2. 创建一个特权账号给 slave 用来进行复制,因为是在本地使用,因此使用 授权访问IP为 192.168开头即可
    mysql> GRANT REPLICATION SLAVE,FILE ON *.* TO 'repl'@'192.168.%' IDENTIFIED BY 'repl';
    
    1. 查看 master ,执行 show master status命令
    mysql> show master status;
    +------------------+----------+--------------+------------------+
    | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB |
    +------------------+----------+--------------+------------------+
    | mysql-bin.000003 |     2457 | permission   |                  |
    +------------------+----------+--------------+------------------+
    1 row in set (0.01 sec)
    
    
    1. 启动 slave 机器的 mysql 并连接
    1. 向 master 建立复制连接

    master_host master 机器 ip
    master_port 端口号
    master_user 用户名
    master_password 密码
    master_log_file binlog 文件名字(show master status 中 File 列 )
    master_log_pos 偏移量(show master status 中 Position 列 )

    mysql > CHANGE MASTER TO master_host = '192.168.189.137',master_port = 3306,master_user='repl',
    master_password='repl',master_log_file='mysql-bin.000003',master_log_pos = 2457; 
    
    1. 查看 slave 状态 show slave status\G;
    mysql> show slave status\G;
    *************************** 1. row ***************************
                   Slave_IO_State: 
                      Master_Host: 192.168.189.137
                      Master_User: echo_slave
                      Master_Port: 3306
                    Connect_Retry: 60
                  Master_Log_File: mysql-bin.000003
              Read_Master_Log_Pos: 2457
                   Relay_Log_File: ubuntu-relay-bin.000009
                    Relay_Log_Pos: 304
            Relay_Master_Log_File: mysql-bin.000003
                 Slave_IO_Running: No
                Slave_SQL_Running: No
                  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: 2457
                  Relay_Log_Space: 512
                  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: NULL
    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: 
                 Master_Info_File: /var/lib/mysql/master.info
                        SQL_Delay: 0
              SQL_Remaining_Delay: NULL
          Slave_SQL_Running_State: 
               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)
    

    可以看到 IO 线程、SQL 线程都没有运行,

    Slave_IO_Running: No
    Slave_SQL_Running: No

    1. 启动复制线程(关闭为:STOP SLAVE)
    START SLAVE:
    

    此时
    Slave_IO_Running: Yes
    Slave_SQL_Running: Yes

    便完全开启复制了

    1. 其他

    默认错误日志在 /var/log/mysql

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