云原生_MySql主从集群搭建-【官方】百战程序员_IT在线教育培训机构


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# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

[mysqld]
log_bin=mysql_bin_log
skip-name-resolve
character_set_server=utf8

#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin

server-id=1
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

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

binlog-ignore-db=performance_schema
binlog-ignore-db=information_schema

修改完数据库配置文件，执行重启命令


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systemctl restart mysqld

在mysql主库终端执行授权命令


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grant replication slave on *.* to 'root'@'%' identified by '123456';


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grant all privileges on *.* to 'root'@'%' identified by '123456';


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flush privileges;

主从设置

进入主库mysql，查看主库状态


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show master status;


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mysql> show master status;
+----------------------+----------+--------------+-------------------------------------------+-------------------+
| File                 | Position | Binlog_Do_DB | Binlog_Ignore_DB                          | Executed_Gtid_Set |
+----------------------+----------+--------------+-------------------------------------------+-------------------+
| localhost-bin.000006 |      154 | itbaizhan    | performance-schema,information-schema,sys |                   |
+----------------------+----------+--------------+-------------------------------------------+-------------------+
1 row in set (0.00 sec)

进入从库MySQL，执行以下命令


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change master to master_host='masterIp',master_port=3306,master_user='root',master_password='password',master_log_file='mysql_bin_log.000006',master_log_pos=154;

完成后，查看从库状态


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mysql> show slave status \G
************************* 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.139.137
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: localhost-bin.000006
          Read_Master_Log_Pos: 154
               Relay_Log_File: localhost-relay-bin.000011
                Relay_Log_Pos: 375
        Relay_Master_Log_File: localhost-bin.000006
             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: 756
              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: 2d1abc2a-a6ad-11ed-b1b6-000c293c3ab2
             Master_Info_File: /var/lib/mysql/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)

从库等待从主库同步数据，说明从库状态正常，集群搭建完成。

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