還能夠參考:https://www.cnblogs.com/Halifa/archive/2016/08/23/5799566.htmlhtml
1、主服務器相關配置mysql
一、建立同步帳戶並指定服務器地址linux
[root@localhost ~]mysql -uroot -p
mysql>use mysql
mysql>grant replication slave on *.* to 'testuser'@'192.168.1.102' identified by '12345678';
mysql>flush privileges; #刷新權限sql
受權用戶testuser只能從192.168.1.102這個地址訪問主服務器192.168.1.101的數據庫,而且只具備數據庫備份的權限數據庫
二、修改/etc/my.cnf配置文件vi /etc/my.cnf服務器
[mysqld]下添加如下參數,若文件中已經存在,則不用添加
server-id=1
log-bin=mysql-bin #啓動MySQL二進制日誌系統,
binlog-do-db=ourneeddb #須要同步的數據庫
binlog-ignore-db=mysql #不一樣步mysql系統數據庫,若還有其它不想同步的,繼續添加
[root@localhost ~]/etc/init.d/mysqld restart #重啓服務ide
三、查看主服務器master狀態(注意File與Position項,從服務器須要這兩項參數)函數
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000012 | 120 | ourneeddb| mysql |
+------------------+----------+--------------+------------------+ui
四、導出數據庫spa
導出數據庫以前先鎖定數據庫
flush tables with read lock; #數據庫只讀鎖定命令,防止導出數據庫的時候有數據寫入
unlock tables; #解除鎖定
導出數據庫結構及數據:mysqldump -uroot -p ourneeddb > /home/ourneeddb.sql
導出存儲過程及函數 :mysqldump -uroot -p -ntd -R ourneeddb > ourneeddb_func.sql
tips:-ntd導出存儲過程、-R導出函數
2、從服務器相關配置
一、修改/etc/my.cnf配置文件vi /etc/my.cnf
[mysqld]下添加如下參數,若文件中已經存在,則不用添加
server-id=2 #設置從服務器id,必須於主服務器不一樣
log-bin=mysql-bin #啓動MySQ二進制日誌系統
replicate-do-db=ourneeddb #須要同步的數據庫名
replicate-ignore-db=mysql #不一樣步mysql系統數據庫
[root@localhost~ ]/etc/init.d/mysqld restart #重啓服務
二、導入數據庫
導入過程這裏不作闡述
三、配置主從同步
[root@localhost~ ]mysql -uroot -p
mysql>use mysql
mysql>stop slave;
mysql>change master to
master_host='192.168.1.101',
master_user='testuser',
master_password='12345678',
master_log_file='mysql-bin.000012',
master_log_pos=120; #log_file與log_pos是主服務器master狀態下的File與Position
mysql>start slave;
mysql>show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.101
Master_User: testuser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000012
Read_Master_Log_Pos: 120
Relay_Log_File: orange-2-relay-bin.000003
Relay_Log_Pos: 283
Relay_Master_Log_File: mysql-bin.000012
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: orange
Replicate_Ignore_DB: mysql,test,information_schema,performance_schema
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: 120
Relay_Log_Space: 1320
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: 773d2987-6821-11e6-b9e0-00163f0004f9
Master_Info_File: /home/mysql/master.info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
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
注意查看Slave_IO_Running: Yes Slave_SQL_Running: Yes 這兩項必須爲Yes 以及Log_File、Log_Pos要於master狀態下的File,Position相同
若是都是正確的,則說明配置成功!
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常見錯誤緣由:
https://www.linuxidc.com/Linux/2012-03/57708.htm
https://blog.csdn.net/jasontech/article/details/39435873
1從服務器配置下列兩項,必定要跟主服務器一致
master_log_file='mysql-bin.000012',
master_log_pos=120; #log_file與log_pos是主服務器master狀態下的File與Position
2 報錯 Slave_IO_Running: NO
(1)
這個錯誤就是IO 進程沒鏈接上 ,想辦法鏈接上把 把與主的POS 號和文件必定要對,而後從新加載下數據。具體步驟:
stop slave ;
change master to master_host='IP地址',master_user='club',master_password='mima ',master_log_file='mysqld-bin.000048',MASTER_LOG_POS=396549485;
注:master_log_file='mysqld-bin.000048',MASTER_LOG_POS=396549485;是從主的上面查出 來的 :show master status\G;
LOAD DATA FROM MASTER;
load data from master;
start slave ;
(2)查看主數據庫錯誤日誌 查找緣由
[ERROR] Slave I/O: 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. Error_code: 1593
我是在虛擬機下 兩臺機子克隆複製 因此兩臺機子中配置文件中uuid一致 隨機修改一下 就解決了
錯誤緣由:因爲主機和備機的UUID一致解決方法:修改UUID保證主備機不一致 到安裝目錄data下的auto.cnf 修改uuid便可(cd /usr/local/mysql/data)