mysql master slave 1( 2015-11)_MySQL

注：环境为主库单实例，从库多实例。

主库开logbin,确认server id 和从库不同

[root@db backup]# egrep "log-bin|server-id" /etc/my.cnf

server-id = 1

log-bin=mysql-bin

[root@db-2 backup]# egrep "log-bin|server-id" /data/3306/my.cnf

#log-bin = /data/3306/mysql-bin

server-id = 06

2.主库建用户用于从库访问

[root@db backup]# mysql -uroot -p111111 -e"grant replication slave on *.* to 'rep'@'%' identified by '111111';flush privileges;"

[root@db backup]# mysql -uroot -p111111 -e"show grants for rep"

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

| Grants for rep@% |

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

| GRANT REPLICATION SLAVE ON *.* TO 'rep'@'%' IDENTIFIED BY PASSWORD '*FD571203974BA9AFE270FE62151AE967ECA5E0AA' |

3.主库备份

mysqldump -uroot -p111111 -A -B --events -master-data=1 -x > /backup/db.sql

#备注:官方建议：锁住表查看(flush table with read lock：show master status;show master logs;)--->备份--->解锁(unlock tables):

4.从库导入（已将数据scp过来）

mysql -uroot -p111111 -S /data/3306/mysql.sock /db.sql

5.从库change master,start slave。

change master to master_host='192.168.199.21', master_port=3306, master_user='rep', master_password='111111',master_log_file='mysql-bin.000025',master_log_pos=107;
start slave;
show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.199.21
                  Master_User: rep
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000025
          Read_Master_Log_Pos: 107
               Relay_Log_File: relay-bin.000002
                Relay_Log_Pos: 253
        Relay_Master_Log_File: mysql-bin.000025
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
  ....
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