mysql主从安装简记

安装两个 数据库版本5.7.19 

10.168.21.180 gsm1 gsm1.localdomain
10.168.21.181 gsm2 gsm2.localdomain

安装软件
配置 /etc/my.cnf
建库 mysqld --defaults-file=/etc/my.cnf --initialize --user=mysql
启动 mysqld_safe --defaults-file=/etc/my.cnf --user=mysql &
更改密码 set password = password('rootroot');
升级 mysql_upgrade -uroot -prootroot

主库备份数据
mysqldump --single-transaction -uroot -prootroot -A --master-data=2 > alldb.sql
-- CHANGE MASTER TO MASTER_LOG_FILE='mysql-bin.000002', MASTER_LOG_POS=550;

从库恢复数据
scp alldb.sql gsm2:/root/backup
mysql -uroot -prootroot <alldb.sql

主库授权：创建备份用户
grant replication slave on *.* to 'bak'@'10.168.%' identified by 'rootroot';
flush privileges;

从库配置复制起点并开始复制
CHANGE MASTER TO
MASTER_HOST='10.168.21.180',
MASTER_USER='bak',
MASTER_PASSWORD='rootroot',
MASTER_PORT=3306,
MASTER_LOG_FILE='mysql-bin.000002',
MASTER_LOG_POS=550;

start slave;

查看状态

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 10.168.21.180
                  Master_User: bak
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 991
               Relay_Log_File: gsm2-relay-bin.000002
                Relay_Log_Pos: 761
        Relay_Master_Log_File: mysql-bin.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: 991
              Relay_Log_Space: 967
              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: 33001
                  Master_UUID: 8a0a909d-e469-11e7-95c0-005056b9c142
             Master_Info_File: /data0/mysql/data/dbatest/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)

ERROR: 
No query specified