1. 实验环境

2. 安装MySQL8

使用官方整合包安装Mysql8

3. 配置主从复制

要想将主节点配置为使用基于二进制日志的复制，必须确保启用了二进制日志记录，并建立唯一的服务器ID

[root@master ~]# cat /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql                # 这是数据存放的路径

socket=/var/lib/mysql/mysql.sock      # 这是监听的套接字

log-error=/var/log/mysqld.log         # 日志输出的路径

pid-file=/var/run/mysqld/mysqld.pid   # pid存放的路径

log-bin=on							  # 开启二进制日志

server-id=1							  # 服务器id为1

[root@slave ~]# cat /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

server-id=2

主节点server-id为0：拒绝来自从节点的任何连接

从节点server-id为0：拒绝连接到主节点

4. 配置复制用户

创建一个只能复制的用户。

mysql> CREATE USER 'repl'@'192.168.100.101' IDENTIFIED BY 'MyNewPass4!';

Query OK, 0 rows affected (0.02 sec)

mysql> GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.100.101';

Query OK, 0 rows affected (0.06 sec)

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.01 sec)

5. 数据的同步

我这里使用的是全新的配置，是没有任何数据的。如果在生产环境中添加新的从节点，你可能需要手动将主节点的数据进行备份，然后导入到从节点，再进行主从复制的配置。（因为可能导致复制失败，并再备份数据的时候，你可能需要锁定，使其无法写入数据。）

# 这条命令会阻止对所有表的写入操作，但当前客户端断开，则会释放锁定

mysql> FLUSH TABLES WITH READ LOCK;

# 这条命令进行解锁

mysql> UNLOCK TABLES;

# 这条命令是确定当前二进制日志文件的名称和位置。

mysql> show master status;

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

| File          | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

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

| binlog.000002 |      866 |              |                  |                   |

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

1 row in set (0.00 sec)

6. 配置从节点

mysql> CHANGE MASTER TO

MASTER_HOST='192.168.100.101',		# 主节点地址

MASTER_USER='repl',					# 主节点用户

MASTER_PASSWORD='MyNewPass4!',		# 主节点密码

MASTER_LOG_FILE='binlog.000002',	# 二进制日志文件

MASTER_LOG_POS=866;					# 二进制日志位置

Query OK, 0 rows affected, 2 warnings (0.05 sec)

mysql> START SLAVE;

Query OK, 0 rows affected (0.04 sec)

mysql> SHOW SLAVE STATUS\G

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

               Slave_IO_State: Waiting for master to send event

                  Master_Host: 192.168.100.101

                  Master_User: repl

                  Master_Port: 3306

                Connect_Retry: 60

              Master_Log_File: binlog.000002

          Read_Master_Log_Pos: 866

               Relay_Log_File: slave-relay-bin.000003

                Relay_Log_Pos: 319

        Relay_Master_Log_File: binlog.000002

             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: 866

              Relay_Log_Space: 691

              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: aa8d6cc4-5f26-11e9-b7d7-000c29999aa1

             Master_Info_File: mysql.slave_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:

       Master_public_key_path:

        Get_master_public_key: 0

1 row in set (0.00 sec)

7. 测试主从复制

# 主节点

mysql> CREATE DATABASE REPL;

Query OK, 1 row affected (0.04 sec)

# 从节点

mysql> SHOW DATABASES;

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

| Database           |

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

| REPL               |

| information_schema |

| mysql              |

| performance_schema |

| sys                |

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

5 rows in set (0.01 sec)

巴特西

Mysql-8 配置主从复制（基于二进制日志）

1. 实验环境

2. 安装MySQL8

3. 配置主从复制

4. 配置复制用户

5. 数据的同步

6. 配置从节点

7. 测试主从复制

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