怎么用xtrabackup工具创建slave节点

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
slaveip: 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

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

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

2.在slave端解压备份集

tar -xzvf xtra_fullbak_2017-02-20.tar

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

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

三.创建复制环境专用账户并赋予权限

create user repl@'192.168.3.173';

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

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

[root@mysqltest mysql_full]# more xtrabackup_binlog_info

mysql-bin.0000161884

执行change masger命令

change master to

master_host='192.168.3.171',

master_port=3306,

master_user='repl',

master_password='replmysql',

master_log_file='mysql-bin.000016',

master_log_pos=1884;

执行start slave命令

mysql > start slave;

六.检查

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

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

Slave_IO_State: Waiting for master to send event

Master_Host: 192.168.3.171

Master_User: repl

Master_Port: 3306

Connect_Retry: 60

Master_Log_File: mysql-bin.000016

Read_Master_Log_Pos: 3631

Relay_Log_File: mysqltest-relay-bin.000002

Relay_Log_Pos: 2067

Relay_Master_Log_File: mysql-bin.000016

Slave_IO_Running: Yes

Slave_SQL_Running: Yes

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: 3631

Relay_Log_Space: 2278

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: 2

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

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

SQL_Delay: 0

SQL_Remaining_Delay: NULL

Slave_SQL_Running_State: Slave 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:

1 row in set (0.00 sec)

七.测试
在master端创建一个表

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

Database changed

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

Query OK, 0 rows affected (0.51 sec)

在slave端查询是否通过成功

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

Database changed

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

+-------+--------------------------------------------------------------------------------------------+

| Table | Create Table |

+-------+--------------------------------------------------------------------------------------------+

| gl | CREATE TABLE `gl` (

`abcd` varchar(20) DEFAULT NULL

) ENGINE=InnoDB DEFAULT CHARSET=utf8 |

+-------+--------------------------------------------------------------------------------------------+

1 row in set (0.00 sec)

同步成功~~~