系统：CentOS 6.5

数据库：MySQL5.7.18  & MySQL5.6.22

软件：xtrabackup-2.1.2

下载链接：http://www.percona.com/redir/downloads/XtraBackup/XtraBackup-2.1.2/binary/Linux/x86_64/percona-xtrabackup-2.1.2-611.tar.gz

关于xtrabackup的安装和使用，可以参考该博主的，写的真的很详细，图文并茂，原理也很好理解，我等初学者受教了。

https://www.cnblogs.com/gomysql/p/3650645.html

以下是我在安装使用过程中出现的一些报错和解决方法：

一、xtrabackup-2.1.2暂时不支持MySQL5.7.18，有的说可以去percona官网查一下可支持的MySQL版本，但是找资料我实在不太行，没找到...所以就换成MySQL5.6.22

二、Can't locate Time/HiRes.pm

报错如下：

[root@backup ~]# innobackupex --user=backup --password=redhat --socket=/tmp/mysql.sock --defaults-file=/etc/my.cnf /data/backup/
Can't locate Time/HiRes.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 /usr/local/xtrabackup/bin/innobackupex line 23.
BEGIN failed--compilation aborted at /usr/local/xtrabackup/bin/innobackupex line 23.

解决办法：

[root@backup ~]# yum install -y perl-Time-HiRes

三、Failed to connect to MySQL server as DBD

报错如下：

[root@backup lib64]# innobackupex --user=backup --password=redhat --socket=/tmp/mysql.sock --defaults-file=/etc/my.cnf /data/backup/InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Ireland Ltd 2009-2012. All Rights Reserved.This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.180110 17:33:48 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;mysql_socket=/tmp/mysql.sock' as 'backup' (using password: YES).
ERROR: Failed to connect to MySQL server as DBD::mysql module is not installed at /usr/local/xtrabackup/bin/innobackupex line 1397.

解决办法：

[root@backup lib64]# yum install -y perl-DBD-MySQL

四、Failed to connect to MySQL server: DBI connect(';mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;mysql_socket=/tmp/mysql.sock','backup',...) failed: Access denied

[root@backup lib64]# innobackupex --user=backup --password=redhat --socket=/tmp/mysql.sock --defaults-file=/etc/my.cnf /data/backup/InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Ireland Ltd 2009-2012. All Rights Reserved.This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.180110 17:45:38 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;mysql_socket=/tmp/mysql.sock' as 'backup' (using password: YES).
ERROR: Failed to connect to MySQL server: DBI connect(';mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;mysql_socket=/tmp/mysql.sock','backup',...) failed: Access denied for user 'backup'@'localhost' (using password: YES) at /usr/local/xtrabackup/bin/innobackupex line 1384

查阅相关资料说是将socke替换成host就可以，（原因是访问socket时没有权限）但是我的根本问题不是这个...

------------------- socket --> host -------------------------------[xbackup@backup ~]$ innobackupex --user=backup --password=redhat --host=127.0.0.1 --defaults-file=/etc/my.cnf /data/backup/
InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Ireland Ltd 2009-2012. All Rights Reserved.
This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.
180110 18:11:21 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;host=127.0.0.1' as 'backup' (using password: YES).
180110 18:11:21 innobackupex: Connected to MySQL server
IMPORTANT: Please check that the backup run completes successfully.
At the end of a successful backup run innobackupex
prints "completed OK!".
innobackupex: Using mysql server version 5.6.22-log
xtrabackup_56: error while loading shared libraries: libssl.so.6: cannot open shared object file: No such file or directory
innobackupex: fatal error: no 'mysqld' group in MySQL options
[xbackup@backup ~]$ DBD::mysql::db selectrow_array failed: MySQL server has gone away at /usr/local/xtrabackup/bin/innobackupex line 1325.

替换成host之后，发现了新的错误

xtrabackup_56: error while loading shared libraries: libssl.so.6: cannot open shared object file: No such file or directory

五、 libssl.so.6

最终解决办法来了：

[xbackup@backup ~]$ sudo yum install -y openssl-devel
[xbackup@backup ~]$ su -
Password:
[root@backup ~]# ln -sf /usr/lib64/libssl.so.10 /usr/lib64/libssl.so.6
[root@backup ~]# ln -sf /usr/lib64/libcrypto.so.10 /usr/lib64/libcrypto.so.6

由于我用普通用户xbackup启动的时候还报了无法创建/data/backup/的权限错误，所以索性改成root来执行，终于成功了，也是不容易....

[root@backup ~]# innobackupex --user=backup --password=redhat --host=127.0.0.1 --defaults-file=/etc/my.cnf /data/backup/
InnoDB Backup Utility v1.5.1-xtrabackup; Copyright 2003, 2009 Innobase Oy
and Percona Ireland Ltd 2009-2012. All Rights Reserved.
This software is published under
the GNU GENERAL PUBLIC LICENSE Version 2, June 1991.
180110 18:34:00 innobackupex: Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_file=/etc/my.cnf;mysql_read_default_group=xtrabackup;host=127.0.0.1' as 'backup' (using password: YES).
180110 18:34:00 innobackupex: Connected to MySQL server
IMPORTANT: Please check that the backup run completes successfully.
At the end of a successful backup run innobackupex
prints "completed OK!".
innobackupex: Using mysql server version 5.6.22-log
innobackupex: Created backup directory /data/backup/2018-01-10_18-34-00
180110 18:34:00 innobackupex: Starting ibbackup with command: xtrabackup_56 --defaults-file="/etc/my.cnf" --defaults-group="mysqld" --backup --suspend-at-end --target-dir=/data/backup/2018-01-10_18-34-00 --tmpdir=/tmp
innobackupex: Waiting for ibbackup (pid=1795) to suspend
innobackupex: Suspend file '/data/backup/2018-01-10_18-34-00/xtrabackup_suspended_2'
xtrabackup_56 version 2.1.2 for MySQL server 5.6.10 Linux (x86_64) (revision id: 611)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to
xtrabackup: Target instance is assumed as followings.
xtrabackup: innodb_data_home_dir = /data/mysql
xtrabackup: innodb_data_file_path = ibdata1:10M:autoextend
xtrabackup: innodb_log_group_home_dir = /data/mysql
xtrabackup: innodb_log_files_in_group = 3
xtrabackup: innodb_log_file_size = 67108864
>> log scanned up to (1650488)
[01] Copying /data/mysql/ibdata1 to /data/backup/2018-01-10_18-34-00/ibdata1
[01] ...done
>> log scanned up to (1650488)
180110 18:34:08 innobackupex: Continuing after ibbackup has suspended
180110 18:34:08 innobackupex: Starting to lock all tables...
>> log scanned up to (1650488)
180110 18:34:08 innobackupex: All tables locked and flushed to disk
180110 18:34:08 innobackupex: Starting to backup non-InnoDB tables and files
innobackupex: in subdirectories of '.'
180110 18:34:08 innobackupex: Finished backing up non-InnoDB tables and files
180110 18:34:08 innobackupex: Waiting for log copying to finish
xtrabackup: The latest check point (for incremental): '1650488'
xtrabackup: Stopping log copying thread.
.>> log scanned up to (1650488)
xtrabackup: Transaction log of lsn (1650488) to (1650488) was copied.
180110 18:34:09 innobackupex: All tables unlocked
innobackupex: Backup created in directory '/data/backup/2018-01-10_18-34-00'
innobackupex: MySQL binlog position: filename 'mysql-bin.000004', position 120
180110 18:34:09 innobackupex: Connection to database server closed
180110 18:34:09 innobackupex: completed OK!

转载于:https://www.cnblogs.com/Kid-Zhou/p/8267507.html

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