mysqlslave--xstrabackup

使用xtrabackup实现MySQL主从复制

环境 ceshi27主库 ceshi28从库
master 172.16.85.10 slave 172.16.85.13

安装xtrabackup 只需要在主库上面安装

yum -y install perl perl-devel libaio libaio-devel perl-Time-HiRes perl-DBD-MySQL
wget https://www.percona.com/downloads/XtraBackup/Percona-XtraBackup-2.2.12/binary/redhat/6/x86_64/percona-xtrabackup-2.2.12-1.el6.x86_64.rpm
rpm -ivh percona-xtrabackup-2.2.12-1.el6.x86_64.rpm

是现在mysql主从复制

主从配置检查

1. 检查server-id配置
   主和从的server-id一定不能一样 不然一定会报错
   show global variables like 'server_id';查看serverid
   也可以通过查看my.cnf
2. 检查binlog日志是否开启
   show global variables like 'log_bin';
   server-id=1
   log-bin=mysql-bin

设置mysql密码

mysqladmin -u root password "tanzhouawen"

master上做全库备份

1. 备份
   innobackupex --defaults-file=/usr/local/services/mysql/my.cnf --user=root --password=t8HPW6^8sg /tmp
2. 保持事务一致性 为了保证备份集中的数据一致，需要操作
   innobackupex --defaults-file=/usr/local/services/mysql/my.cnf --user=root --password=t8HPW6^8sg --apply-log /tmp/2017-03-16_07-46-14
3. 拷贝文件到slave
   scp -r /tmp/2017-03-16_07-46-14 172.16.85.13:/tmp

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master上创建同步账号并授权REPLICATION

1. 创建用户并授权
   CREATE USER 'slave'@'172.16.85.%' IDENTIFIED BY 'slave';
   GRANT REPLICATION SLAVE, REPLICATION CLIENT ON . TO 'slave'@'172.16.85.%';
   flush privileges;
2. 在从库测试是否可以使用slave账号登录
   mysql -h172.16.85.10 -uslave -p'slave'

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在从库上面把主库的文件拷贝到/data/mysql/data目录

1. 停掉从库
   /etc/init.d/mysqld stop
2. 复制从master上面拷贝的文件放到slave的datadir目录下
   mv /tmp/2017-03-16_07-46-14/* /data/mysql/data
3. msyqldir的data目录授权
   chown -R mysql:mysql /data/mysql/data

---

启动从库 并执行change master设置主服务器复制信息

1. 启动从库的mysql
   /etc/init.d/mysqld start
2. 在slave上执行change master设置主服务器复制信息
   master binlog日志从备份文件中可以获得
   cd /tmp/2017-03-16_07-46-14
   cat xtrabackup_binlog_info
   [root@ceshi14 2017-03-16_07-46-14]# cat xtrabackup_binlog_info
   mysql-bin.000017 107
   进入mysql设置change master设置主服务器复制信息
   change master to master_host='172.16.85.10', master_user='slave', master_password='slave',master_port=3306,master_log_file='mysql-bin.000017',master_log_pos=107;

change master to master_host='172.16.147.13', master_user='slave', master_password='slave',master_port=3306,master_log_file='mysql-bin.000001',master_log_pos=244;

在slave上面启动复制

slave start;
检查主从复制是否正常
mysql>show slave status\G;
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
主从制作OK

mysql 报错1

[ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist
mysql_install_db –usrer=mysql datadir=/var/lib/mysql

报错2

innobackupex: Error: Built-in InnoDB in MySQL 5.1 is not supported in this release. You can either use Percona XtraBackup 2.0, or upgrade to InnoDB plugin.
重新下载2.0版本
wget https://www.percona.com/downloads/XtraBackup/XtraBackup-2.0.8/RPM/rhel6/x86_64/percona-xtrabackup-20-2.0.8-587.rhel6.x86_64.rpm
rpm -ivh