MySQL 5.5如何使用Xtrabackup在线搭建复制环境

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– 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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