mysql5.7主主(雙主)複製

mysql5.7主主(雙主)複製

原創woymk2017-05-07 09:08:23評論(0)403人閱讀

1. 準備工做

（本文永久地址：http://woymk.blog.51cto.com/10000269/1922786）

配置環境：centos6.9，mysql5.7

先安裝、配置好兩臺MySQL服務器

server1 IP：192.168.1.1

server2 IP：192.168.1.2

mysql的安裝請參考以前的文章：

LAMP環境搭建(centos6.9+apache2.4+mysql5.7+php7.1)

2. 在server1上操做

vi /etc/my.cnf
修改或添加下面這幾行：
server-id=1

log-bin=mysql-bin # 啓用二進制日誌
auto-increment-increment = 2  #每次增加2
auto-increment-offset = 1 #設置自動增加的字段的偏移量
兩個可選參數（2選1）：
binlog-do-db=db1,db2 #須要同步的庫
binlog-ignore-db=db1,db2 #忽略不一樣步的庫

保存後重啓

/etc/init.d/mysqld restart

運行mysql客戶端
mysql -uroot -p

建立同步帳號

grant replication slave on *.* to 'repl2'@'192.168.1.2' identified by '1234';
flush privileges;

鎖表，不讓數據寫入

flush tables with read lock; 
show master status;

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      613 |              | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

記錄下二進制日誌文件名和位置

備份數據庫

在mysql1上執行
mysqldump -uroot -p db1 > back.sql；

把備份好的數據拷貝到從服務器

scp back.sql 192.168.1.2:~

3. 在server2操做

vi /etc/my.cnf
修改或增長：
server-id=2 #這個數值不能和主同樣
log-bin=mysql-bin # 啓用二進制日誌
auto-increment-increment = 2  #每次增加2
auto-increment-offset = 2 #設置自動增加的字段的偏移量

可選參數（2選1，這兩個參數設置成和主同樣）：
replicate-do-db=db1,db2
replicate-ignore-db=db1,db2

保存後重啓

/etc/init.d/mysqld restart

把在server1上備份的數據導入server2

在server2上執行
[root@server2 ~]# mysqldump -uroot -p db1 < back.sql

運行mysql客戶端

mysql -uroot -p

建立同步帳號

grant replication slave on *.* to 'repl1'@'192.168.1.1' identified by '1234';
flush privileges;

show master status;

mysql> show master status;
+------------------+----------+--------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+--------------+------------------+-------------------+
| mysql-bin.000001 |      613 |              | mysql            |                   |
+------------------+----------+--------------+------------------+-------------------+
1 row in set (0.00 sec)

記錄下二進制日誌文件名和位置

執行如下命令
stop slave; 
change master to master_host='192.168.1.1',master_user='repl2',master_password='1234',master_log_file='mysql-bin.000001',master_log_pos=613;
(master_log_file和master_log_pos填上剛纔記錄下的二進制日誌文件名和位置)

start slave;

查看從服務器的狀態：

show slave status\G

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.1
                  Master_User: repl2
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 613
               Relay_Log_File: server2-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

4. 回到server1上操做

運行mysql客戶端
mysql -uroot -p

取消server1上數據庫的鎖定

mysql> unlock tables;

執行如下命令
stop slave; 
change master to master_host='192.168.1.2',master_user='repl1',master_password='1234',master_log_file='mysql-bin.000001',master_log_pos=613;
(master_log_file和master_log_pos填上剛纔記錄下的二進制日誌文件名和位置)

start slave;

查看從服務器的狀態：

show slave status\G

mysql> show slave status\G
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.2
                  Master_User: repl1
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 613
               Relay_Log_File: server1-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

 

5. 主主複製測試

經測試，主主複製配置成功。

具體過程略，請自行請參考上一篇 mysql5.7主從配置 裏的方法。