Xtrabackup安装与使用

[root@node3 ~]# tar xf percona-xtrabackup-2.4.7-Linux-x86_64.tar.gz
[root@node3 ~]# cd percona-xtrabackup-2.4.7-Linux-x86_64
[root@node3 percona-xtrabackup-2.4.7-Linux-x86_64]# mkdir /usr/local/xtrabackup
[root@node3 percona-xtrabackup-2.4.7-Linux-x86_64]# mv * /usr/local/xtrabackup/
[root@node3 percona-xtrabackup-2.4.7-Linux-x86_64]#  ln -s /usr/local/xtrabackup/bin/* /usr/bin/

[root@localhost backup]# innobackupex --defaults-file=/etc/my.cnf --socket=/var/lib/mysql/mysql.sock --user=root --password="123456" --backup /root/backup
200115 21:22:08 innobackupex: Starting the backup operation

IMPORTANT: Please check that the backup run completes successfully.
           At the end of a successful backup run innobackupex
           prints "completed OK!".

Can‘t locate Data/Dumper.pm in @INC (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5 .) at - line 688.
报错

[root@localhost backup]# yum install ‘perl(Data::Dumper)‘
[root@localhost backup]# yum -y install perl-Digest-MD5

[root@localhost backup]# cd 2020-01-15_21-29-53/
[root@localhost 2020-01-15_21-29-53]# ls -l
总用量 12336
drwxr-x---. 2 root root       48 1月  15 21:29 a
-rw-r-----. 1 root root      424 1月  15 21:29 backup-my.cnf
-rw-r-----. 1 root root      354 1月  15 21:29 ib_buffer_pool
-rw-r-----. 1 root root 12582912 1月  15 21:29 ibdata1
drwxr-x---. 2 root root     4096 1月  15 21:29 mysql
drwxr-x---. 2 root root     8192 1月  15 21:29 performance_schema
drwxr-x---. 2 root root     8192 1月  15 21:29 sys
-rw-r-----. 1 root root      113 1月  15 21:29 xtrabackup_checkpoints
-rw-r-----. 1 root root      493 1月  15 21:29 xtrabackup_info
-rw-r-----. 1 root root     2560 1月  15 21:29 xtrabackup_logfile

[root@localhost 2020-01-15_21-29-53]# cat xtrabackup_info 
uuid = 1fad2cc0-379b-11ea-afa7-000c29f66717
name = 
tool_name = innobackupex
tool_command = --defaults-file=/etc/my.cnf --socket=/var/lib/mysql/mysql.sock --user=root --password=... --backup /root/backup
tool_version = 2.4.7
ibbackup_version = 2.4.7
server_version = 5.7.29
start_time = 2020-01-15 21:29:54
end_time = 2020-01-15 21:29:57
lock_time = 0
binlog_pos = 
innodb_from_lsn = 0
innodb_to_lsn = 2635117
partial = N
incremental = N
format = file
compact = N
compressed = N
encrypted = N
这里面就是相关的备份文件，同样也可以看到我们创建的库的名称

[root@localhost 2020-01-15_21-29-53]# innobackupex --apply-log /root/backup/2020-01-15_21-29-53/
使用此参数使用相关数据性文件保持一致性状态

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| a                  |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
5 rows in set (0.14 sec)

mysql> use a;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+-------------+
| Tables_in_a |
+-------------+
| a1          |
+-------------+
1 row in set (0.00 sec)

mysql> select * from a1;
+-------+------+
| name  | age  |
+-------+------+
| lishi |   19 |
+-------+------+
1 row in set (0.00 sec)

mysql> drop table a1;
Query OK, 0 rows affected (0.34 sec)
mysql> select * from a1;
ERROR 1146 (42S02): Table ‘a.a1‘ doesn‘t exist

[root@localhost ~]# systemctl stop mysqld
[root@localhost ~]# cd /var/lib/mysql
[root@localhost mysql]#  rm -rf *

[root@localhost mysql]# innobackupex --defaults-file=/etc/my.cnf --copy-back /root/backup/2020-01-15_21-29-53/
[root@localhost mysql]# chown -R mysql:mysql ./*

[root@localhost mysql]# systemctl start mysqld
[root@localhost mysql]# mysql -uroot -p123456
mysql> use a;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+-------------+
| Tables_in_a |
+-------------+
| a1          |
+-------------+
1 row in set (0.00 sec)

mysql> select * from a1;
+-------+------+
| name  | age  |
+-------+------+
| lishi |   19 |
+-------+------+
1 row in set (0.00 sec)