mysql的主從配置

下載最新mysql 的yum源

1、wget https://dev.mysql.com/get/mysql57-community-release-el6-11.noarch.rpm

安裝最新mysql

rpm -ivh mysql57-community-release-el6-11.noarch.rpm 
yum -y install mysql-server  

啟動mysql數據庫

service mysqld start

提示：由於5.7初始化會自動生成密碼 ：

cat /var/log/mysqld.log

2018-03-24T13:19:50.925206Z 0
 
 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp 
server option (see documentation for more details).
2018-03-24T13:19:54.106661Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-03-24T13:19:54.588874Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
 
2018-03-24T13:19:54.805786Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been 
started. Generating a new UUID: 0abbeb4b-2f66-11e8-81f3-000c292c7cea.
2018-03-24T13:19:54.810834Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed
 
‘ cannot be opened.
2018-03-24T13:19:54.841042Z 1 [Note] A temporary password is generated for root@localhost: :kufY//k0zk&  (這是隨機生成的密碼)

登錄mysql數據庫並修改密碼：

mysql    -uroot  -p
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘Xu19920615!@‘; 

1.配置master的配置文件my.cnf

#打開日誌(主機需要打開)
log-bin=mysql-bin
##服務器id（這個是唯一的）
server-id=1
#給從機同步的庫(可以寫多個庫)
binlog-do-db=mydb
binlog-do-db=mydb2
binlog-do-db=test

#自動清理5天前的log文件
expire_logs_days=5

2.修改從服務器的從數據庫slave /etc/my.cnf配置

#服務器id
server-id=2
##要從主機同步的庫
replicate-do-db=mydb
replicate-do-db=mydb2
replicate-do-db=test

3.修改之後，重啟MySQL主數據庫和MySQL從數據庫的服務

service mysqld restart

4.配置主服務器的主數據庫

主數據庫授權同步賬戶

mysql> GRANT REPLICATION SLAVE ON *.* TO ‘root‘@‘192.168.10.115‘ IDENTIFIED BY ‘Xu19920615!@‘;
Query OK, 0 rows affected, 1 warning (0.01 sec)

刷新權限

FLUSH PRIVILEGES;

查看主服務狀態

mysql> show master status ;
+------------------+----------+-----------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB    | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+-----------------+------------------+-------------------+
| mysql-bin.000001 |      602 | mydb,mydb2,test |                  |                   |
+------------------+----------+-----------------+------------------+-------------------+
1 row in set (0.00 sec)

5.配置從服務器的從數據庫

mysql> CHANGE MASTER TO MASTER_HOST=‘192.168.10.116‘,    -> MASTER_USER=‘root‘,    -> MASTER_PASSWORD=‘Xu19920615!@‘,    -> MASTER_LOG_FILE=‘mysql-bin.000001‘,\ （這個都是根據主服務器查詢出的結果）
    -> MASTER_LOG_POS=602;（就是主服務器 show master status；）
Query OK, 0 rows affected, 2 warnings (0.13 sec)

開啟SLAVE同步

start slave;　

查看下slave狀態

show slave status \G;

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.10.116
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 602
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes （這個位置顯示yes）
            Slave_SQL_Running: Yes （這個位置也顯示yes表示主從復制配置成功）
              Replicate_Do_DB: mydb,mydb2,test
          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: 602
              Relay_Log_Space: 531
              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: 0abbeb4b-2f66-11e8-81f3-000c292c7cea
             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)

當Slave_IO_Running和Slave_SQL_Running都為Yes，才說明主從復制成功

6.停止SLAVE同步

stop slave;

7.撤銷已經賦予給MySQL同步賬戶的權限

revoke 跟 grant 的語法差不多，只需要把關鍵字 “to” 換成 “from” 即可：

GRANT REPLICATION SLAVE ON *.* TO ‘root‘@‘192.168.10.116‘ IDENTIFIED BY ‘XXXXXX‘;

REVOKE REPLICATION SLAVE ON *.* FROM ‘root‘@‘192.168.10.116‘;

8.授權賬號可以遠程登錄

GRANT ALL ON *.* TO 用戶名@‘%‘ IDENTIFIED BY ‘密碼‘ WITH GRANT OPTION;

mysql-5.7的主從配置