MySQL架构备份之M-S-S级联备份

By | 2019年12月3日
目录
[隐藏]

M–S1–S2 级联复制

master—>slave1—>slave2

master需要开启二进制日志

中间的slave1也需要打开二进制日志,但是它默认不把应用master的操作记录到自己的二进制日志。所以需要打开一个参数让它记录,才可以传给第三级的从;然后在中间从和第三级从之间再做一次AB复制就可以了。

打开log-slave-updates=1,让第一台传过来relay日志记录到自己的二进制日志。

思路:

先搭建好主从——>然后加入slave2

环境准备及要求:

1、关闭防火墙和selinux

2、hosts文件中三台服务器主机名和ip地址一一对应起来

3、系统时间需要同步

4、master和slave的数据库版本保持一致(系统版本保持一致)

思路:

先搭建好主从——>然后加入slave2

1、master和中间slave1必须开启二进制日志

2、slave2必须开启中继日志

3、master和slave1和slave2的server-id必须不一样  范围(2^23-1)

4、master和slave的初始数据一致

M–S1–S2级联架构操作步骤

环境:

master:192.168.1.166

slave1:192.168.1.114

slave2:192.168.1.180

1、环境准备

# 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

2、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

3、数据初始化一致

情况1:master和slave都没有业务数据,直接初始化master和slave的数据库

情况2:master上面有业务数据

masteer:
1>停止数据库
[root@master ~]# /etc/init.d/mysqld stop

2>物理级别备份
[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进行数据恢复
[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上面的数据是否一样
[root@master DB]# echo "show databases;" | mysql -p123
[root@slave1 DB]# echo "show databases;" | mysql -p123
[root@slave2 DB]# echo "show databases;" | mysql -p123

4、在master上面创建对slave1授权用户及查看binlog信息

1>创建授权用户
mysql> grant replication slave on *.* to 'slave'@'192.168.1.114' identified by '123';

2>查看binglog信息,只有打开二进制日志,这句命令才有结果,表示当前数据库的二进制日志写到什么位置
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)

5、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;
参数说明:
    master_host:        master ip
    master_user:        同步用户
    master_password:    密码
    master_port:     端口
    master_log_file:    master上面查看到的二进制日志名
    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
如果查看状态这两个值都为Yes, 说明M--S就已经做好

6、在slave1上面对slave2授权

先停止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)

7、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

8、在回到slave1上面启动slave

slave1:
mysql> start slave;

9、测试验证

先查看原有的三个服务器的db01库中的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上面删除一条数据
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)

总结:

测试验证在master上面操作,会同步到slave1上面,相对slave2来说,也等于在slave1上面进行了相同的操作,所有slave2上面也会发生相应的改变

 

发表评论

您的电子邮箱地址不会被公开。 必填项已用*标注