实现mysql8.0主从复制

#主机192.168.6.132，从：192.168.6.130  mysql-server 8.0.26

#主数据库配置
#修改server-id号
[root@xinye ~]#vim /etc/my.cnf
[mysqld]
server-id=32    #建议设置成当前设备IP尾号避免冲突

#查看二进制文件和位置
mysql> show master logs;
+------------------+-----------+-----------+
| Log_name         | File_size | Encrypted |
+------------------+-----------+-----------+
| mysql-bin.000001 |       156 | No        |
+------------------+-----------+-----------+

#创建允许复制数据权限的账号
mysql> create user repluser@'192.168.6.%' identified by '123456';
mysql> grant replication slave on *.* to 'repluser'@'192.168.6.%';

#从节点配置
[root@centos7-130 ~]#vim /etc/my.cnf.d/mysql-server.cnf 
[mysqld]
server-id=30  #插入数据库ID
read_only=ON  #设置成只读不能修改数据
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
log-error=/var/log/mysql/mysqld.log
pid-file=/run/mysqld/mysqld.pid

#连接主数据库配置
mysql> CHANGE MASTER TO
    ->   MASTER_HOST='192.168.6.132',   #主机地址
    ->   MASTER_USER='repluser',             #复制数据的账号
    ->   MASTER_PASSWORD='123456',      #密码
    ->   MASTER_PORT=3306,
    ->   MASTER_LOG_FILE='mysql-bin.000001',   #二进制文件
    ->   MASTER_LOG_POS=156,                          #二进制节点
    ->   MASTER_CONNECT_RETRY=10;

#使用有复制权限的用户账号连接至主服务器，并启动复制线程
mysql> start slave;

#
mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.6.132
                  Master_User: repluser
                  Master_Port: 3306
                Connect_Retry: 10
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 1066
               Relay_Log_File: centos7-130-relay-bin.000002
                Relay_Log_Pos: 1233
        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: 1066
              Relay_Log_Space: 1447
              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: 32
                  Master_UUID: 90b7c0ef-9f4e-11ec-99b7-000c297b4c59
             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
            Network_Namespace: 

复制冲突的解决

#方法1
MariaDB [(none)]> stop slave;
MariaDB [(none)]> set global sql_slave_skip_counter=1; #表示跳过前面一条复制事件
MariaDB [(none)]> start slave;
#方法2
[root@slave1 ~]#vim /etc/my.cnf.d/mariadb-server.cnf
[mysqld]
slave_skip_errors=1050  #服务器选项，只读系统变量，指定跳过事件的ID
[root@slave1 ~]#systemctl restart mariadb