MySQL架構備份之M-S-S級聯備份

M--S1--S2 級聯複製

master—>slave1—>slave2mysql

master須要開啓二進制日誌linux

中間的slave1也須要打開二進制日誌,可是它默認不把應用master的操做記錄到本身的二進制日誌。因此須要打開一個參數讓它記錄,才能夠傳給第三級的從;而後在中間從和第三級從之間再作一次AB複製就能夠了。sql

打開log-slave-updates=1,讓第一臺傳過來relay日誌記錄到本身的二進制日誌。數據庫

思路:vim

先搭建好主從——>而後加入slave2服務器

環境準備及要求:架構

一、關閉防火牆和selinuxide

二、hosts文件中三臺服務器主機名和ip地址一一對應起來測試

三、系統時間須要同步spa

四、master和slave的數據庫版本保持一致(系統版本保持一致)

思路:

先搭建好主從——>而後加入slave2

一、master和中間slave1必須開啓二進制日誌

二、slave2必須開啓中繼日誌

三、master和slave1和slave2的server-id必須不同  範圍(2^23-1)

四、master和slave的初始數據一致

M--S1--S2級聯架構操做步驟

環境:

master:192.168.1.166

slave1:192.168.1.114

slave2:192.168.1.180

一、環境準備

# master:
[root@master ~]# vim /etc/hosts
192.168.1.114   slave1

# slave1:
[root@slave1 ~]# vim /etc/hosts
192.168.1.166   master
192.168.1.180   slave2

# slave2:
[root@slave2 ~]# vim /etc/hosts
192.168.1.114   slave1

二、修改配置文件

# master:
root@master ~]# vim /etc/my.cnf
log-bin=mysql-bin
server-id = 1

# slave1:
[root@slave1 ~]# vim /etc/my.cnf
log-bin=mysql-bin
log-slave-updates=1
server-id = 2
relay-log=/data/DB/relay.log

# slave2:
[root@slave2 ~]# vim /etc/my.cnf
server-id = 3
relay-log=/data/DB/relay.log

三、數據初始化一致

狀況1:master和slave都沒有業務數據,直接初始化master和slave的數據庫

狀況2:master上面有業務數據

masteer:
1>中止數據庫
[root@master ~]# /etc/init.d/mysqld stop

2>物理級別備份
[root@master ~]# cd /data/DB/ && ll
[root@master DB]# tar -cvzf /tmp/mysql.tar.gz *
[root@master DB]# scp /tmp/mysql.tar.gz 192.168.1.114:/tmp
[root@master DB]# scp /tmp/mysql.tar.gz 192.168.1.180:/tmp


3>slave1和slave2進行數據恢復
[root@slave1 ~]# cd /data/DB/ && ll
[root@slave1 DB]# tar -xf /tmp/mysql.tar.gz -C .
[root@slave1 DB]# /etc/init.d/mysqld start

[root@slave2 ~]# cd /data/DB/ && ll
[root@slave2 DB]# tar -xf /tmp/mysql.tar.gz -C .
[root@slave2 DB]# /etc/init.d/mysqld start

4>查看slave和master上面的數據是否同樣
[root@master DB]# echo "show databases;" | mysql -p123
[root@slave1 DB]# echo "show databases;" | mysql -p123
[root@slave2 DB]# echo "show databases;" | mysql -p123
示例master上面有業務數據

四、在master上面建立對slave1受權用戶及查看binlog信息

1>建立受權用戶
mysql> grant replication slave on *.* to 'slave'@'192.168.1.114' identified by '123';

2>查看binglog信息,只有打開二進制日誌,這句命令纔有結果,表示當前數據庫的二進制日誌寫到什麼位置
mysql> show master status \G
*************************** 1. row ***************************
             File: mysql-bin.000013
         Position: 331
     Binlog_Do_DB: 
 Binlog_Ignore_DB: 
Executed_Gtid_Set: 
1 row in set (0.03 sec)

五、在slave1上配置同步信息

slave1:
mysql> change master to master_host='192.168.1.166', master_user='slave', master_password='123', master_port=3306, master_log_file='mysql-bin.000013', master_log_pos=331;
參數說明:
    master_host:        master ip
    master_user:        同步用戶
    master_password:    密碼
    master_port:     端口
    master_log_file:    master上面查看到的二進制日誌名
    master_log_pos:     master上面查看到的POS值
    
mysql> start slave;
mysql> show slave status \G;
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
若是查看狀態這兩個值都爲Yes, 說明M--S就已經作好

六、在slave1上面對slave2受權

先中止slave
slave1:
mysql> stop slave;
Query OK, 0 rows affected (0.03 sec)

mysql> grant replication slave on *.* to 'slave'@'192.168.1.180' identified by '123';
mysql> show master status \G
*************************** 1. row ***************************
             File: mysql-bin.000017
         Position: 425
     Binlog_Do_DB: 
 Binlog_Ignore_DB: 
Executed_Gtid_Set: 
1 row in set (0.00 sec)

七、在slave2上配置同步信息

slave2:
mysql> change master to  master_host='192.168.1.114', master_user='slave', master_password='123', master_port=3306, master_log_file='mysql-bin.000017', master_log_pos=425;
mysql> start slave;
mysql> show slave status \G;
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes

八、在回到slave1上面啓動slave

slave1:
mysql> start slave;

九、測試驗證

先查看原有的三個服務器的db01庫中的table03表,
master:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    3 | lili |
    |    4 | yoyo |
    +------+------+
    7 rows in set (0.10 sec)

slave1:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    3 | lili |
    |    4 | yoyo |
    +------+------+
    7 rows in set (0.17 sec)

slave2:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    3 | lili |
    |    4 | yoyo |
    +------+------+
    7 rows in set (0.44 sec)

    

在master上面刪除一條數據
mysql> delete from db01.table03 where name="lili";
Query OK, 1 row affected (0.38 sec)
    
再次查看
master:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    +------+------+
    6 rows in set (0.00 sec)    
    
slave1:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    +------+------+
    6 rows in set (0.00 sec)
        
slave2:
    mysql> select * from db01.table03;
    +------+------+
    | id   | name |
    +------+------+
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    |    1 | haha |
    |    2 | wowo |
    |    4 | yoyo |
    +------+------+
    6 rows in set (0.00 sec)
測試驗證

總結:

測試驗證在master上面操做,會同步到slave1上面,相對slave2來講,也等於在slave1上面進行了相同的操做,全部slave2上面也會發生相應的改變

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