案例：配置一主多从结构
1 问题
1）基于一主一从的案例，把结构配置为一主多从结构
- 配置192.168.88.55为192.168.88.53主机的从服务器
- 客户端测试配置。
2 方案
准备新的服务器，要求如表-2所示
表-2
在真机创建虚拟机
实验拓扑如图-2所示。
图-2
3 步骤
实现此案例需要按照如下步骤进行。
步骤一：配置192.168.88.55主机
1)指定MySQL55主机的server-id 并重启数据库服务
[root@mysql55 ~]# vim /etc/my.cnf.d/mysql-server.cnf
[mysqld]
server-id=55
:wq
[root@mysql55 ~]# systemctl restart mysqld步骤二:配置192.168.88.53主机
1）查看正在使用的binlog日志
[root@mysql53 ~]# mysql -e 'show master status'
+----------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+----------------+----------+--------------+------------------+-------------------+
| mysql53.000002 | 156 | | | |
+----------------+----------+--------------+------------------+-------------------+
[root@mysql53 ~]#2）完全备份
[root@mysql53 ~]# mysqldump -B gamedb > /root/gamedb.sql3）把备份文件拷贝给从服务器mysql55
[root@mysql53 ~]# scp /root/gamedb.sql root@192.168.88.55:/root/步骤三：配置192.168.88.55主机
1）mysql55主机使用备份文件恢复数据
[root@mysql55 ~]# mysql < /root/gamedb.sql2）在MySQL55主机指定主服务器信息
注意:日志名和偏移量 要写 在mysql53主机执行完全备份之前查看到的日志名和偏移量
[root@mysql55 ~]# mysql
mysql> change master to
master_host="192.168.88.53",
master_user="repluser",
master_password="123qqq...A",
master_log_file="mysql53.000002",
master_log_pos=156;3）启动slave进程
mysql> start slave;4）查看状态信息
mysql> show slave status \G
*************************** 1. row ***************************
Slave_IO_State: Waiting for source to send event
Master_Host: 192.168.88.53
Master_User: repluser
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql53.000002
Read_Master_Log_Pos: 156
Relay_Log_File: mysql55-relay-bin.000002
Relay_Log_Pos: 322
Relay_Master_Log_File: mysql53.000002
Slave_IO_Running: Yes //正常
Slave_SQL_Running: Yes //正常
Replicate_Do_DB:
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: 156
Relay_Log_Space: 533
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: 53
Master_UUID: 38c02165-005e-11ee-bd2d-525400007271
Master_Info_File: mysql.slave_master_info
SQL_Delay: 0
SQL_Remaining_Delay: NULL
Slave_SQL_Running_State: Replica 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:
Master_public_key_path:
Get_master_public_key: 0
Network_Namespace:
1 row in set, 1 warning (0.00 sec)5）在mysql55添加客户端访问时使用的用户
mysql> create user plj@"%" identified by "123456";
mysql> grant insert,update,delete,select on gamedb.* to plj@"%" ;步骤四：客户端测试配置
1）在client50 连接主服务器mysql53 存储数据
//连接主服务器存储数据
[root@mysql50 ~]# mysql -h192.168.88.53 -uplj -p123456
mysql> insert into gamedb.user values("tt","aid");
mysql> insert into gamedb.user values("mm","uid");2）在client50 分别连接2个从服务器查看数据
//连接从服务器54查看数据
[root@mysql50 ~]# mysql -h192.168.88.54 -uplj -p123456
Mysql> select * from gamedb.user;
+------+-------+
| name | class |
+------+-------+
| yaya | nsd |
| tt | aid |
| mm | uid |
+------+-------+//连接从服务器55查看数据
[root@mysql50 ~]# mysql -h192.168.88.55 -uplj -p123456
Mysql> select * from gamedb.user;
+------+-------+
| name | class |
+------+-------+
| yaya | nsd |
| tt | aid |
| mm | uid |
+------+-------+
