mysql之 percona-xtrabackup 2.4.7安装（热备工具）
准备：os是centos6.7,提前下载并上传 percona-xtrabackup 安装包，下载网址为： https://www.percona.com/downloads/XtraBackup/LATEST/
1.安装依赖包
[root@localhost xtrabackup]# yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL
Dependency Installed:
perl-DBI.x86_64 0:1.609-4.el6
Complete!
2. 安装 percona-xtrabackup 工具
2.1 -- 发现缺包
[root@mysql01 ~]# rpm -ivh percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm
warning: percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
error: Failed dependencies:
libcurl.so.3()(64bit) is needed by percona-xtrabackup-24-2.4.7-1.el5.x86_64
libev.so.4()(64bit) is needed by percona-xtrabackup-24-2.4.7-1.el5.x86_64
2.2 -- 配置本地yum源后，用 yum 发现依然找不到包，搜寻后，网友解决方法是 单独下载 libev-4.15-1.el6.rf.x86_64.rpm 包
2.3 -- 安装 libev-4.15-1.el6.rf.x86_64.rpm 包，过了。
[root@mysql01 ~]# rpm -ivh libev-4.15-1.el6.rf.x86_64.rpm
[root@mysql01 ~]# rpm -ivh percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm
warning: percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
error: Failed dependencies:
libcurl.so.3()(64bit) is needed by percona-xtrabackup-24-2.4.7-1.el5.x86_64
2.4 -- libcurl.so.3()(64bit) is needed by percona-xtrabackup-24-2.4.7-1.el5.x86_64 ，依然解决不了，最后决定强行安装。（这个问题卡了两个小时，现在不能很好的解决，留到以后再看）
[root@mysql01 ~]# rpm -ivh percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm --nodeps --force
warning: percona-xtrabackup-24-2.4.7-1.el5.x86_64.rpm: Header V4 DSA/SHA1 Signature, key ID cd2efd2a: NOKEY
Preparing... ########################################### [100%]
1:percona-xtrabackup-24 ########################################### [100%]
3. 测试，查看 percona-xtrabackup 版本
[root@mysql01 ~]# innobackupex -v
innobackupex version 2.4.7 Linux (x86_64) (revision id: 6f7a799)
[root@mysql01 ~]# rpm -ql percona-xtrabackup-24
/usr/bin/innobackupex
/usr/bin/xbcloud
/usr/bin/xbcloud_osenv
/usr/bin/xbcrypt
/usr/bin/xbstream
/usr/bin/xtrabackup
说明：Xtrabackup有两个主要的工具：xtrabackup、innobackupex
a、xtrabackup只能备份InnoDB和XtraDB两种数据表，而不能备份MyISAM数据表
b、innobackupex是一个perl脚本封装了xtrabackup。支持同时备份InnoDB和MyISAM引擎的表。
4. 测试全备数据库
[root@mysql01 ~]# innobackupex --user=root --password=oracle --port=3606 --socket=/var/lib/mysql/mysql.sock /xtrabackup/full/
170602 06:48:07 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!".
170602 06:48:07 version_check Connecting to MySQL server with DSN 'dbi:mysql:;mysql_read_default_group=xtrabackup;port=3606;mysql_socket=/var/lib/mysql/mysql.sock' as 'root' (using password: YES).
Failed to connect to MySQL server as DBD::mysql module is not installed at - line 1327.
170602 06:48:07 Connecting to MySQL server host: localhost, user: root, password: set, port: 3606, socket: /var/lib/mysql/mysql.sock
Using server version 5.6.25
innobackupex version 2.4.7 based on MySQL server 5.7.13 Linux (x86_64) (revision id: 6f7a799)
xtrabackup: uses posix_fadvise().
xtrabackup: cd to /var/lib/mysql/
xtrabackup: open files limit requested 0, set to 1024
xtrabackup: using the following InnoDB configuration:
xtrabackup: innodb_data_home_dir = .
xtrabackup: innodb_data_file_path = ibdata1:12M:autoextend
xtrabackup: innodb_log_group_home_dir = ./
xtrabackup: innodb_log_files_in_group = 2
xtrabackup: innodb_log_file_size = 50331648
InnoDB: Number of pools: 1
。。。。
170602 06:48:10 Executing UNLOCK TABLES
170602 06:48:10 All tables unlocked
170602 06:48:10 Backup created in directory '/xtrabackup/full/2017-06-02_06-48-07/'
170602 06:48:10 [00] Writing backup-my.cnf
170602 06:48:10 [00] ...done
170602 06:48:10 [00] Writing xtrabackup_info
170602 06:48:10 [00] ...done
xtrabackup: Transaction log of lsn (1626027) to (1626027) was copied.
170602 06:48:10 completed OK!
5. 检查备份
[root@mysql01 ~]# ll /xtrabackup/full/
total 4
drwxr-x---. 5 root root 4096 Jun 2 06:53 2017-06-02_06-53-37
说明：工具使用没有问题，成功！
