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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
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

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.000016 1884

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)