如何在 Xtrabackup 中建立 MySQL 5.5 的复制环境

这篇文章给大家分享的是有关MySQL 5.5如何使用Xtrabackup在线搭建复制环境的内容。小编觉得挺实用的，因此分享给大家做个参考，一起跟随小编过来看看吧。

--编辑Master的配置文件

[root@localhost install]# vim /etc/my.cnf

# Log

server-id = 100

log-bin = /log/binlog/mysql-bin

--在Slave安装好MySQL软件，安装流程可以参考源码安装文章

http://blog.itpub.net/26506993/viewspace-2072859/

--在Master节点，使用Xtrabackup创建完整备份

关于Xtrabackup，可参考

http://blog.itpub.net/26506993/viewspace-2087734/

http://blog.itpub.net/26506993/viewspace-2088737/

[root@localhost backup]# /install/percona/percona-xtrabackup-2.4.2-Linux-x86_64/bin/innobackupex --defaults-file=/etc/my.cnf --stream=tar /tmp --user system --password 'Mysql#2015' | gzip -> 

/backup/xtra/xtra_fullbackup_20160501.tar.gz

--拷贝备份到Slave节点

[root@localhost backup]# scp /backup/xtra/xtra_fullbackup_20160501.tar.gz root@192.168.78.137:/backup/20160501

解压备份到数据文件目录

[root@localhost 5505]# tar xivfz xtra_fullbackup_20160501.tar.gz -C /mysql_data/5505

在Slave节点上面需要安装Xtraback

--使用Xtrabackup准备数据、应用日志，使数据文件达到一致性的状态

[root@localhost bin]# ./innobackupex --defaults-file=/mysql_data/cnf/my.cnf --apply-log /mysql_data/5505

.....

InnoDB: Doing recovery: scanned up to log sequence number 68405269 (0%)

InnoDB: Doing recovery: scanned up to log sequence number 68405269 (0%)

InnoDB: Database was not shutdown normally!

InnoDB: Starting crash recovery.

InnoDB: xtrabackup: Last MySQL binlog file position 414, file name /log/binlog/mysql-bin.000012

InnoDB: Removed temporary tablespace data file: "ibtmp1"

InnoDB: Creating shared tablespace for temporary tables

InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...

InnoDB: File './ibtmp1' size is now 12 MB.

InnoDB: 96 redo rollback segment(s) found. 1 redo rollback segment(s) are active.

InnoDB: 32 non-redo rollback segment(s) are active.

InnoDB: 5.7.11 started; log sequence number 68405269

xtrabackup: starting shutdown with innodb_fast_shutdown = 1

InnoDB: FTS optimize thread exiting.

InnoDB: Starting shutdown...

InnoDB: Shutdown completed; log sequence number 68405621

160430 23:51:25 completed OK!

--在Master数据库上面创建复制专用账户

mysql> grant replication slave on *.* to 'repl'@'192.168.78.%' identified by 'Mysql#2015';

Query OK, 0 rows affected (0.04 sec)

--配置Slave的配置文件

[root@localhost 5505]# vim /mysql_data/cnf/my.cnf

# Log

server-id = 200

log-bin = /mysql_log/binlog/mysql-bin

relay-log = /mysql_log/binlog/product-relay-bin

relay-log-index = /mysql_log/binlog/product-relay-index

binlog_cache_size = 32M

max_binlog_cache_size = 512M

max_binlog_size = 512M

binlog_format = MIXED

relay_log_recovery = 1

--启动Slave节点的Mysql服务

[root@localhost bin]# /data/bin/mysqld_safe --defaults-file=/mysql_data/cnf/my.cnf &

--配置Slave节点复制环境

查询Slave节点连接Master节点的二进制文件和位置

使用Xtrabackup备份时，在xtrabackup_binlog_info文件中会保存这部分信息

[root@localhost 5505]# more xtrabackup_binlog_info

mysql-bin.000012 414

--在Slave节点执行CHANGE MASTER语句

mysql> change master to

  -> master_host='192.168.78.139',

  -> master_port=3306,

  -> master_user='repl',

  -> master_password='Mysql#2015',

  -> master_log_file='mysql-bin.000012',

  -> master_log_pos=414;

Query OK, 0 rows affected (0.13 sec)

--启动应用线程

mysql> start slave;

--查看同步状态

mysql> show slave status\G

*************************** 1. row ***************************

        Slave_IO_State: Waiting for master to send event

         Master_Host: 192.168.78.141

         Master_User: repl

         Master_Port: 3306

        Connect_Retry: 60

       Master_Log_File: mysql-bin.000013

     Read_Master_Log_Pos: 341

        Relay_Log_File: product-relay-bin.000003

        Relay_Log_Pos: 487

    Relay_Master_Log_File: mysql-bin.000013

       Slave_IO_Running: Yes

      Slave_SQL_Running: Yes

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