使用xtrabackup工具實現(xiàn)mysql的多實例備份和還原

下面講講關于使用xtrabackup工具實現(xiàn)mysql的多實例備份和還原，文字的奧妙在于貼近主題相關。所以，閑話就不談了，我們直接看下文吧，相信看完使用xtrabackup工具實現(xiàn)mysql的多實例備份和還原這篇文章你一定會有所受益。

1、安裝percona-xtrabackup

# 下載安裝包：

# cd /usr/local/src
# wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.3.2/binary/redhat/6/x86_64/percona-xtrabackup-2.3.2-1.el6.x86_64.rpm

# 安裝依賴庫：

# yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL
# wget ftp://rpmfind.net/linux/dag/redhat/el6/en/x86_64/dag/RPMS/libev-4.15-1.el6.rf.x86_64.rpm 
# rpm -ivh libev-4.15-1.el6.rf.x86_64.rpm
# rpm -ivh percona-xtrabackup-2.3.2-1.el6.x86_64.rpm

# 創(chuàng)建備份的目錄：

# mkdir -p /databackup/fullbackup
# mkdir -p /databackup/increasebackup

# 創(chuàng)建備份用戶和授權：

mysql>grant SELECT,RELOAD,SHOW DATABASES,SUPER,LOCK TABLES,REPLICATION CLIENT,SHOW VIEW,EVENT,FILE on *.* to backup@'localhost' identified by 'MANAGER';

2、 備份3306實例：

# innobackupex --defaults-file=/data/3306/my.cnf --socket=/data/3306/mysql.sock --user=backup --password='MANAGER' /mysqlbackup/fullbackup/3306

說明：
--defaults-file，指定mysql實例的配置文件
--socket，指定socket的位置
--user，指定備份的用戶
--password，指定用戶名稱
/mysqlbackup/fullbackup/3306，這里我們將實例備份到/mysqlbackup/fullbackup/3306目錄下

# du -sh /mysqlbackup/fullbackup/3306
130M /mysqlbackup/fullbackup/3306
# ls -lrt /mysqlbackup/fullbackup/3306/*
總用量 131136
-rw-r----- 1 root root 134217728 10月 12 04:32 ibdata1
drwx------ 2 root root      4096 10月 12 04:32 james
drwx------ 2 root root      4096 10月 12 04:32 ems
drwx------ 2 root root      4096 10月 12 04:32 mysql
drwx------ 2 root root      4096 10月 12 04:32 performance_schema
drwx------ 2 root root      4096 10月 12 04:32 wh510
drwx------ 2 root root      4096 10月 12 04:32 www
drwx------ 2 root root      4096 10月 12 04:32 blog
drwx------ 2 root root      4096 10月 12 04:32 opark
drwx------ 2 root root      4096 10月 12 04:32 dawnpro
drwx------ 2 root root      4096 10月 12 04:32 eip
drwx------ 2 root root      4096 10月 12 04:32 hangzhou_dawnpro
-rw-r----- 1 root root        21 10月 12 04:32 xtrabackup_binlog_info
-rw-r----- 1 root root      2560 10月 12 04:32 xtrabackup_logfile
-rw-r----- 1 root root       113 10月 12 04:32 xtrabackup_checkpoints
-rw-r----- 1 root root       386 10月 12 04:32 backup-my.cnf
-rw-r----- 1 root root       551 10月 12 04:32 xtrabackup_info

3、模擬3306數(shù)據(jù)文件丟失

# rm -rf /data/3306/data
# lsof -i :3306

說明：此時數(shù)據(jù)庫已經(jīng)沒法正常運行，檢查錯誤日志，發(fā)現(xiàn)沒有了data目錄
161012 04:40:35 mysqld_safe mysqld from pid file /data/3306/mysqld.pid ended
161012 04:42:10 mysqld_safe Starting mysqld daemon with databases from /data/3306/data
161012  4:42:10 [Warning] Can't create test file /data/3306/data/mysql-master.lower-test
161012  4:42:10 [Warning] Can't create test file /data/3306/data/mysql-master.lower-test
/application/mysql-5.5.32/bin/mysqld: Can't change dir to '/data/3306/data/' (Errcode: 2)
161012  4:42:10 [ERROR] Aborting

161012  4:42:10 [Note] /application/mysql-5.5.32/bin/mysqld: Shutdown complete

161012 04:42:10 mysqld_safe mysqld from pid file /data/3306/mysqld.pid ended

4、mysql全備數(shù)據(jù)恢復：
# mkdir -p /data/3306/data
# 對于一般恢復，都是直接用備份文件還原，如果我們這里也是直接運用該備份文件，則可能會導致一些意想不到的問題，比如:備份的數(shù)據(jù)中可能會包含尚未提交的事務或已經(jīng)提交但尚未同步至數(shù)據(jù)文件中的事務。因此，此時數(shù)據(jù)文件處于不一致的狀態(tài)，我們現(xiàn)在就是要通過回滾未提交的事務及同步已經(jīng)提交的事務至數(shù)據(jù)文件也使得數(shù)據(jù)文件處于一致性狀態(tài)。所以我們要用如下命令進行檢查：

# innobackupex  --apply-log --redo-only /mysqlbackup/fullbackup/3306/2016-10-12_04-32-49/

161012 04:53:07 innobackupex: Starting the apply-log operation

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

innobackupex version 2.3.2 based on MySQL server 5.6.24 Linux (x86_64) (revision id: 306a2e0)
xtrabackup: cd to /mysqlbackup/fullbackup/3306/2016-10-12_04-32-49/
xtrabackup: This target seems to be already prepared with --apply-log-only.
xtrabackup: notice: xtrabackup_logfile was already used to '--prepare'.
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup:   innodb_data_home_dir = ./
xtrabackup:   innodb_data_file_path = ibdata1:10M:autoextend
xtrabackup:   innodb_log_group_home_dir = ./
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
xtrabackup: using the following InnoDB configuration for recovery:
xtrabackup:   innodb_data_home_dir = ./
xtrabackup:   innodb_data_file_path = ibdata1:10M:autoextend
xtrabackup:   innodb_log_group_home_dir = ./
xtrabackup:   innodb_log_files_in_group = 2
xtrabackup:   innodb_log_file_size = 50331648
xtrabackup: Starting InnoDB instance for recovery.
xtrabackup: Using 104857600 bytes for buffer pool (set by --use-memory parameter)
InnoDB: Using atomics to ref count buffer pool pages
InnoDB: The InnoDB memory heap is disabled
InnoDB: Mutexes and rw_locks use GCC atomic builtins
InnoDB: Memory barrier is not used
InnoDB: Compressed tables use zlib 1.2.3
InnoDB: Using CPU crc32 instructions
InnoDB: Initializing buffer pool, size = 100.0M
InnoDB: Completed initialization of buffer pool
InnoDB: Highest supported file format is Barracuda.
xtrabackup: Last MySQL binlog file position 2442, file name /data/3306/mysql-bin.000008

xtrabackup: starting shutdown with innodb_fast_shutdown = 1
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number 1606678
161012 04:53:08 completed OK!

# innobackupex --defaults-file=/data/3306/my.cnf --copy-back /mysqlbackup/fullbackup/3306/2016-10-12_04-32-49/
161012 04:56:32 innobackupex: Starting the copy-back operation

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

innobackupex version 2.3.2 based on MySQL server 5.6.24 Linux (x86_64) (revision id: 306a2e0)
161012 04:56:32 [01] Copying ib_logfile0 to /data/3306/data/ib_logfile0
161012 04:56:33 [01]        ...done
161012 04:56:33 [01] Copying ib_logfile1 to /data/3306/data/ib_logfile1
161012 04:56:34 [01]        ...done
161012 04:56:34 [01] Copying ibdata1 to /data/3306/data/ibdata1
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./james/db.opt to /data/3306/data/james/db.opt
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./ems/db.opt to /data/3306/data/ems/db.opt
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/func.MYD to /data/3306/data/mysql/func.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone.MYD to /data/3306/data/mysql/time_zone.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/help_topic.MYD to /data/3306/data/mysql/help_topic.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/tables_priv.MYI to /data/3306/data/mysql/tables_priv.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/db.MYD to /data/3306/data/mysql/db.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/proc.frm to /data/3306/data/mysql/proc.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/help_relation.MYI to /data/3306/data/mysql/help_relation.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/proxies_priv.MYI to /data/3306/data/mysql/proxies_priv.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/func.frm to /data/3306/data/mysql/func.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/plugin.MYD to /data/3306/data/mysql/plugin.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/user.frm to /data/3306/data/mysql/user.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone_transition.MYD to /data/3306/data/mysql/time_zone_transition.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone_transition_type.MYD to /data/3306/data/mysql/time_zone_transition_type.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/general_log.CSV to /data/3306/data/mysql/general_log.CSV
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/event.MYI to /data/3306/data/mysql/event.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone_leap_second.frm to /data/3306/data/mysql/time_zone_leap_second.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/help_relation.frm to /data/3306/data/mysql/help_relation.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/ndb_binlog_index.MYD to /data/3306/data/mysql/ndb_binlog_index.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/procs_priv.frm to /data/3306/data/mysql/procs_priv.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/db.frm to /data/3306/data/mysql/db.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/event.frm to /data/3306/data/mysql/event.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/plugin.MYI to /data/3306/data/mysql/plugin.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/help_category.frm to /data/3306/data/mysql/help_category.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone_name.MYD to /data/3306/data/mysql/time_zone_name.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/event.MYD to /data/3306/data/mysql/event.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/proc.MYI to /data/3306/data/mysql/proc.MYI
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/tables_priv.MYD to /data/3306/data/mysql/tables_priv.MYD
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/servers.frm to /data/3306/data/mysql/servers.frm
161012 04:56:36 [01]        ...done
161012 04:56:36 [01] Copying ./mysql/time_zone_leap_second.MYI to /data/3306/data/mysql/time_zone_leap_second.MYI
161012 04:56:36 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/proxies_priv.MYD to /data/3306/data/mysql/proxies_priv.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/procs_priv.MYI to /data/3306/data/mysql/procs_priv.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone.MYI to /data/3306/data/mysql/time_zone.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/slow_log.CSV to /data/3306/data/mysql/slow_log.CSV
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_transition.frm to /data/3306/data/mysql/time_zone_transition.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/procs_priv.MYD to /data/3306/data/mysql/procs_priv.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_topic.MYI to /data/3306/data/mysql/help_topic.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/user.MYI to /data/3306/data/mysql/user.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_keyword.MYD to /data/3306/data/mysql/help_keyword.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/db.MYI to /data/3306/data/mysql/db.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/func.MYI to /data/3306/data/mysql/func.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/servers.MYI to /data/3306/data/mysql/servers.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_category.MYD to /data/3306/data/mysql/help_category.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/host.MYI to /data/3306/data/mysql/host.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone.frm to /data/3306/data/mysql/time_zone.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_category.MYI to /data/3306/data/mysql/help_category.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/proxies_priv.frm to /data/3306/data/mysql/proxies_priv.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/general_log.frm to /data/3306/data/mysql/general_log.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_keyword.frm to /data/3306/data/mysql/help_keyword.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/proc.MYD to /data/3306/data/mysql/proc.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/columns_priv.MYI to /data/3306/data/mysql/columns_priv.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/slow_log.frm to /data/3306/data/mysql/slow_log.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_topic.frm to /data/3306/data/mysql/help_topic.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_keyword.MYI to /data/3306/data/mysql/help_keyword.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_name.MYI to /data/3306/data/mysql/time_zone_name.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/host.MYD to /data/3306/data/mysql/host.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/columns_priv.MYD to /data/3306/data/mysql/columns_priv.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/user.MYD to /data/3306/data/mysql/user.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/ndb_binlog_index.frm to /data/3306/data/mysql/ndb_binlog_index.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/tables_priv.frm to /data/3306/data/mysql/tables_priv.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/general_log.CSM to /data/3306/data/mysql/general_log.CSM
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_leap_second.MYD to /data/3306/data/mysql/time_zone_leap_second.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/servers.MYD to /data/3306/data/mysql/servers.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/host.frm to /data/3306/data/mysql/host.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_name.frm to /data/3306/data/mysql/time_zone_name.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/help_relation.MYD to /data/3306/data/mysql/help_relation.MYD
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_transition.MYI to /data/3306/data/mysql/time_zone_transition.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/slow_log.CSM to /data/3306/data/mysql/slow_log.CSM
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/ndb_binlog_index.MYI to /data/3306/data/mysql/ndb_binlog_index.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/columns_priv.frm to /data/3306/data/mysql/columns_priv.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_transition_type.MYI to /data/3306/data/mysql/time_zone_transition_type.MYI
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/time_zone_transition_type.frm to /data/3306/data/mysql/time_zone_transition_type.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./mysql/plugin.frm to /data/3306/data/mysql/plugin.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_summary_by_instance.frm to /data/3306/data/performance_schema/events_waits_summary_by_instance.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/file_instances.frm to /data/3306/data/performance_schema/file_instances.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/performance_timers.frm to /data/3306/data/performance_schema/performance_timers.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/file_summary_by_event_name.frm to /data/3306/data/performance_schema/file_summary_by_event_name.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_summary_by_thread_by_event_name.frm to /data/3306/data/performance_schema/events_waits_summary_by_thread_by_event_name.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_current.frm to /data/3306/data/performance_schema/events_waits_current.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/setup_instruments.frm to /data/3306/data/performance_schema/setup_instruments.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/threads.frm to /data/3306/data/performance_schema/threads.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/file_summary_by_instance.frm to /data/3306/data/performance_schema/file_summary_by_instance.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_history.frm to /data/3306/data/performance_schema/events_waits_history.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/rwlock_instances.frm to /data/3306/data/performance_schema/rwlock_instances.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/setup_consumers.frm to /data/3306/data/performance_schema/setup_consumers.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/setup_timers.frm to /data/3306/data/performance_schema/setup_timers.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_summary_global_by_event_name.frm to /data/3306/data/performance_schema/events_waits_summary_global_by_event_name.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/mutex_instances.frm to /data/3306/data/performance_schema/mutex_instances.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/events_waits_history_long.frm to /data/3306/data/performance_schema/events_waits_history_long.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/cond_instances.frm to /data/3306/data/performance_schema/cond_instances.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./performance_schema/db.opt to /data/3306/data/performance_schema/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./wh510/db.opt to /data/3306/data/wh510/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./www/db.opt to /data/3306/data/www/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./xtrabackup_info to /data/3306/data/xtrabackup_info
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./blog/db.opt to /data/3306/data/blog/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./xtrabackup_binlog_pos_innodb to /data/3306/data/xtrabackup_binlog_pos_innodb
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./opark/person.frm to /data/3306/data/opark/person.frm
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./opark/db.opt to /data/3306/data/opark/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./dawnpro/db.opt to /data/3306/data/dawnpro/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./eip/db.opt to /data/3306/data/eip/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 [01] Copying ./hangzhou_dawnpro/db.opt to /data/3306/data/hangzhou_dawnpro/db.opt
161012 04:56:37 [01]        ...done
161012 04:56:37 completed OK!
說明：innobackup的copy-back用于執(zhí)行恢復操作時，它是通過復制所有數(shù)據(jù)相關文件至MySQL數(shù)據(jù)目錄，因此，需要清空數(shù)據(jù)目錄。

[root@mysql-master data]# ll /data/3306/data
總用量 229432
drwx------ 2 root root      4096 10月 12 04:56 blog
drwx------ 2 root root      4096 10月 12 04:56 dawnpro
drwx------ 2 root root      4096 10月 12 04:56 eip
drwx------ 2 root root      4096 10月 12 04:56 ems
drwx------ 2 root root      4096 10月 12 04:56 hangzhou_dawnpro
-rw-r----- 1 root root 134217728 10月 12 04:56 ibdata1
-rw-r----- 1 root root  50331648 10月 12 04:56 ib_logfile0
-rw-r----- 1 root root  50331648 10月 12 04:56 ib_logfile1
drwx------ 2 root root      4096 10月 12 04:56 james
drwx------ 2 root root      4096 10月 12 04:56 mysql
drwx------ 2 root root      4096 10月 12 04:56 opark
drwx------ 2 root root      4096 10月 12 04:56 performance_schema
drwx------ 2 root root      4096 10月 12 04:56 wh510
drwx------ 2 root root      4096 10月 12 04:56 www
-rw-r----- 1 root root        33 10月 12 04:56 xtrabackup_bin

5、更改數(shù)據(jù)庫目錄權限

# chown -R mysql.mysql /data/3306/data

6、開啟mysql服務

啟動mysql發(fā)現(xiàn)沒法起來，檢查日志信息如下（InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes）：
# tail -15 mysql_oldboy3306.err
161012  5:00:15 InnoDB: Mutexes and rw_locks use GCC atomic builtins
161012  5:00:15 InnoDB: Compressed tables use zlib 1.2.3
161012  5:00:15 InnoDB: Using Linux native AIO
161012  5:00:15 InnoDB: Initializing buffer pool, size = 32.0M
161012  5:00:15 InnoDB: Completed initialization of buffer pool
InnoDB: Error: log file ./ib_logfile0 is of different size 0 50331648 bytes
InnoDB: than specified in the .cnf file 0 4194304 bytes!
161012  5:00:15 [ERROR] Plugin 'InnoDB' init function returned error.
161012  5:00:15 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
161012  5:00:15 [ERROR] Unknown/unsupported storage engine: InnoDB
161012  5:00:15 [ERROR] Aborting

161012  5:00:15 [Note] /application/mysql-5.5.32/bin/mysqld: Shutdown complete

161012 05:00:15 mysqld_safe mysqld from pid file /data/3306/mysqld.pid ended

# rm ib_logfile* -rf
# /data/3306/mysql start
# netstat -tunlp| grep 3306
tcp        0      0 0.0.0.0:3306      0.0.0.0:*               LISTEN      29697/mysqld

7、進入數(shù)據(jù)庫進行驗證

# mysql -uroot -predhat12345 -S /data/3306/mysql.sock
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| blog               |
| dawnpro            |
| eip                |
| ems                |
| hangzhou_dawnpro   |
| james              |
| mysql              |
| opark              |
| performance_schema |
| wh510              |
| www                |
+--------------------+
12 rows in set (0.01 sec)
對于以上使用xtrabackup工具實現(xiàn)mysql的多實例備份和還原相關內容，大家還有什么不明白的地方嗎？或者想要了解更多相關，可以繼續(xù)關注我們的行業(yè)資訊板塊。