怎么用xtrabackup工具创建slave节点

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xtrabackup安装和备份方法等请先参考我的另一篇博客 Http://blog.itpub.net/20893244/viewspace-2133530/
环境:
master ip：192.168.3.171
slave    ip: 192.168.3.173
Mysql版本：
(root@localhost) [gldb]> select version();
+------------+
| version()  |
+------------+
| 5.7.17-log |
+------------+
1 row in set (0.00 sec)

用xtrabackup工具创建slave节点需要七步骤，我们一步一步操作

一.在master节点完整备份数据

1. innobackupex  --defaults-file=/etc/my.cnf --host=oracle11gtest   --user=xtrabk --parallel=4 --passWord=onlybackupgl  --extra-lsndir=/alidata1/mysqlbackup/mysql_full --stream=tar /tmp | gzip > /alidata1/mysqlbackup/mysql_full/xtra_fullbak_2017-02-20.tar.gz

二.复制和准备备份集

1.把备份集拷贝到slave端

1. scp -r /alidata1/mysqlbackup/mysql_full root@192.168.3.173:/alidata1/mysqldata/mysqlbackup

2.在slave端解压备份集

1. tar -xzvf xtra_fullbak_2017-02-20.tar

3.准备数据，执行innobackupex命令附加--apply-log参数

1. innobackupex --apply-log /alidata1/mysqldata/mysqlbackup/mysql_full

三.创建复制环境专用账户并赋予权限

1. create user repl@'192.168.3.173';
   

2. grant replication slave on *.* to repl identified by 'replmysql';

四.配置slave节点的初始化参数

从master端拷贝到slave端，还是用scp命令；
在slave端修改初始化文件,把server_id修改为一个非0的值
启动数据库

1. mysqld_safe --defaults-file=/etc/my.cnf &

五.配置slave节点复制环境

查看xtrabackup_binlog_info文件里的数据

1. [root@mysqltest mysql_full]# more xtrabackup_binlog_info
   

2. mysql-bin.000016        1884

执行change masger命令

1. change master to
   

2. master_host='192.168.3.171',
   

3. master_port=3306,
   

4. master_user='repl',
   

5. master_password='replmysql',
   

6. master_log_file='mysql-bin.000016',
   

7. master_log_pos=1884;

执行start slave命令

1. mysql > start slave;

六.检查

1. (root@localhost) [(none)]> show slave status \G;
   

2. *************************** 1. row ***************************
   

3.                Slave_IO_State: Waiting for master to send event
   

4.                   Master_Host: 192.168.3.171
   

5.                   Master_User: repl
   

6.                   Master_Port: 3306
   

7.                 Connect_Retry: 60
   

8.               Master_Log_File: mysql-bin.000016
   

9.           Read_Master_Log_Pos: 3631
   

10.                Relay_Log_File: mysqltest-relay-bin.000002
    

11.                 Relay_Log_Pos: 2067
    

12.         Relay_Master_Log_File: mysql-bin.000016
    

13.              Slave_IO_Running: Yes
    

14.             Slave_SQL_Running: Yes
    

15.               Replicate_Do_DB:
    

16.           Replicate_Ignore_DB:
    

17.            Replicate_Do_Table:
    

18.        Replicate_Ignore_Table:
    

19.       Replicate_Wild_Do_Table:
    

20.   Replicate_Wild_Ignore_Table:
    

21.                    Last_Errno: 0
    

22.                    Last_Error:
    

23.                  Skip_Counter: 0
    

24.           Exec_Master_Log_Pos: 3631
    

25.               Relay_Log_Space: 2278
    

26.               Until_Condition: None
    

27.                Until_Log_File:
    

28.                 Until_Log_Pos: 0
    

29.            Master_SSL_Allowed: No
    

30.            Master_SSL_CA_File:
    

31.            Master_SSL_CA_Path:
    

32.               Master_SSL_Cert:
    

33.             Master_SSL_Cipher:
    

34.                Master_SSL_Key:
    

35.         Seconds_Behind_Master: 0
    

36. Master_SSL_Verify_Server_Cert: No
    

37.                 Last_IO_Errno: 0
    

38.                 Last_IO_Error:
    

39.                Last_SQL_Errno: 0
    

40.                Last_SQL_Error:
    

41.   Replicate_Ignore_Server_Ids:
    

42.              Master_Server_Id: 2
    

43.                   Master_UUID: 659e33c7-f1ef-11e6-8e3e-00163e3225da
    

44.              Master_Info_File: /alidata1/mysqldata/3306/data/master.info
    

45.                     SQL_Delay: 0
    

46.           SQL_Remaining_Delay: NULL
    

47.       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
    

48.            Master_Retry_Count: 86400
    

49.                   Master_Bind:
    

50.       Last_IO_Error_Timestamp:
    

51.      Last_SQL_Error_Timestamp:
    

52.                Master_SSL_Crl:
    

53.            Master_SSL_Crlpath:
    

54.            Retrieved_Gtid_Set:
    

55.             Executed_Gtid_Set:
    

56.                 Auto_Position: 0
    

57.          Replicate_Rewrite_DB:
    

58.                  Channel_Name:
    

59.            Master_TLS_Version:
    

60. 1 row in set (0.00 sec)

七.测试
在master端创建一个表

1. (root@localhost) [(none)]> use gldb
   

2. Database changed
   

3. (root@localhost) [gldb]> create table gl (abcd varchar(20));
   

4. Query OK, 0 rows affected (0.51 sec)

在slave端查询是否通过成功

1. (root@localhost) [(none)]> use gldb;
   

2. Database changed
   

3. (root@localhost) [gldb]> show create table gl;
   

4. +-------+--------------------------------------------------------------------------------------------+
   

5. | Table | Create Table |
   

6. +-------+--------------------------------------------------------------------------------------------+
   

7. | gl | CREATE TABLE `gl` (
   

8.   `abcd` varchar(20) DEFAULT NULL
   

9. ) ENGINE=InnoDB DEFAULT CHARSET=utf8 |
   

10. +-------+--------------------------------------------------------------------------------------------+
    

11. 1 row in set (0.00 sec)

同步成功~~~

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