MySQL 5.7 基于GTID搭建主从复制

MySQL 5.7 基于GTID搭建主从复制

 
 一、搭建过程
1.1 准备三个MySQL实例

mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3307/data/
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3308/data/
mysqld --initialize-insecure --user=mysql --basedir=/usr/local/mysql --datadir=/mysql/3309/data/

1.2 server_id, server_uuid 不同

mysql -uroot -p123 -e "select @@server_id"
mysql -uroot -p123 -e "select @@server_uuid"

1.3 gtid_mode 是否开启：

mysql -uroot -p123 -e "select @@gtid_mode"
mysql -uroot -p123 -e "select @@server_gtid"
vi 330{7..9}/my.cnf
gtid_mode=ON
enforce_gtid_consistency=ON
log_slave_updates=ON

1.4 确认binlog开启

mysql -uroot -p123 -e "select @@log_bin"

1.5 备份主库数据到从库通过远程方式

mysqldump -uroot -p123 -h 192.168.84.30 -P 3307 > /tmp/full.sql

1.6 恢复数据

mysql> source /tmp/full.sql

1.7 主库创建复制用户

 grant replication slave on *.* to repl@'192.168.84.30' identified by '123';

1.8 从库启动复制

 帮助：
mysql> help change master to
......
找到配置模板：
CHANGE MASTER TO
  MASTER_HOST='master2.example.com',
  MASTER_USER='replication',
  MASTER_PASSWORD='password',
  MASTER_PORT=3306,
  MASTER_LOG_FILE='master2-bin.001',
  MASTER_LOG_POS=4,
  MASTER_CONNECT_RETRY=10;
  
  3308，3309使用如下配置：
CHANGE MASTER TO
  MASTER_HOST='192.168.84.30',
  MASTER_USER='repl',
  MASTER_PASSWORD='123',
  MASTER_PORT=3307,
  master_auto_position=1;
  
开始配置3308
mysql> CHANGE MASTER TO
    ->   MASTER_HOST='192.168.84.30',
    ->   MASTER_USER='repl',
    ->   MASTER_PASSWORD='123',
    ->   MASTER_PORT=3307,
    ->   master_auto_position=1;
Query OK, 0 rows affected, 2 warnings (0.00 sec)
开始配置3309
mysql> CHANGE MASTER TO
    ->   MASTER_HOST='192.168.84.30',
    ->   MASTER_USER='repl',
    ->   MASTER_PASSWORD='123',
    ->   MASTER_PORT=3307,
    ->   master_auto_position=1;
Query OK, 0 rows affected, 2 warnings (0.00 sec)

1.9 查看状态：

mysql> show slave status \G;  查看slave状态
mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: 
                  Master_Host: 192.168.84.30
                  Master_User: repl
                  Master_Port: 3307
                Connect_Retry: 60
              Master_Log_File: 
          Read_Master_Log_Pos: 4
               Relay_Log_File: open_source-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: 
             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: 0
              Relay_Log_Space: 154
              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: 0
                  Master_UUID: 
             Master_Info_File: /mysql/3308/data/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: 1
         Replicate_Rewrite_DB: 
                 Channel_Name: 
           Master_TLS_Version: 
1 row in set (0.00 sec)
ERROR: 
No query specified

2.0 启动和关闭复制：

start slave;
stop slave;

备注：5.7 MGR 新出的亮点，8.0.17建议用MGR