目录

mysql 主从设置

目录
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#主数据库设置
server-id               = 1
log_bin                 = /var/log/mysql/mysql-bin.log
expire_logs_days        = 10
max_binlog_size   = 100M
binlog_do_db            = important_db
#binlog_ignore_db       = include_database_name
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CREATE USER 'slave'@'%' IDENTIFIED BY 'mysql';

GRANT SELECT,REPLICATION SLAVE ON *.* TO 'slave'@'%';

#查询主数据库状态
mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      154 | important_db |                  |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)
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#从数据库设置
server-id               = 2
log_bin                 = /var/log/mysql/mysql-bin.log
expire_logs_days        = 10
max_binlog_size   = 100M
#binlog_do_db           = include_database_name
#binlog_ignore_db       = include_database_name




change master to
master_host='192.168.20.227',
master_user='slave',
master_password='mysql',
master_log_file='mysql-bin.000004',
master_log_pos=154;

change master to
master_host='192.168.20.227',
master_user='slave',
master_password='mysql',
master_log_file='mysql-bin.000006',
master_log_pos=154;

START SLAVE;

#停止复制命令(一般不会用)
STOP SLAVE;


#主库查看
show slave hosts;
+-----------+------+------+-----------+--------------------------------------+
| Server_id | Host | Port | Master_id | Slave_UUID                           |
+-----------+------+------+-----------+--------------------------------------+
|         2 |      | 3306 |         1 | 2bceb603-ad46-11e6-87fa-001c42ab617d |
+-----------+------+------+-----------+--------------------------------------+
1 row in set (0.00 sec)


SHOW SLAVE STATUS\G;
               Slave_IO_State:
                  Master_Host: 192.168.20.227
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 154
               Relay_Log_File: TalliuUbuntuServer16-relay-bin.000001
                Relay_Log_Pos: 4
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: No
            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: 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: 1593
                Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1
                  Master_UUID:
             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: 161121 11:17:20
     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)

Fatal error: The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work.

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#master
mysql> show variables like 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     | 1     |
+---------------+-------+
1 row in set (0.07 sec)

#slave
mysql> show variables like 'server_id';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| server_id     | 2     |
+---------------+-------+
1 row in set (2.33 sec)


mysql> show variables like 'data%';
+---------------+-----------------+
| Variable_name | Value           |
+---------------+-----------------+
| datadir       | /var/lib/mysql/ |
+---------------+-----------------+
1 row in set (0.00 sec)

#master
jobs@TalliuUbuntuServer16:/etc/mysql$ sudo cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=2bceb603-ad46-11e6-87fa-001c42ab617d

#slave
jobs@TalliuUbuntuServer16:/etc/mysql$ sudo cat /var/lib/mysql/auto.cnf
[sudo] password for jobs:
[auto]
server-uuid=2bceb603-ad46-11e6-87fa-001c42ab617d
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sudo rm cat /var/lib/mysql/auto.cnf
sudo service mysql restart

jobs@TalliuUbuntuServer16:/etc/mysql$ sudo cat /var/lib/mysql/auto.cnf
[auto]
server-uuid=c069c892-af9a-11e6-9416-001c42ab617d