使用Innobackupex快速搭建(修复)MySQL主从架构html
MySQL的主从搭建你们有不少种方式,传统的mysqldump方式是不少人的选择之一。但对于较大的数据库则该方式并不是理想的选择。使用Xtrabackup能够快速轻松的构建或修复mysql主从架构。本文描述了使用innobackupex快速来搭建或修复主从架构。供你们参考。mysql
mysql> set global gtid_mode='OFF_PERMISSIVE'; Query OK, 0 rows affected (0.01 sec) mysql> set global gtid_mode='ON_PERMISSIVE'; Query OK, 0 rows affected (0.01 sec) mysql> set global enforce_gtid_consistency=ON; Query OK, 0 rows affected (0.00 sec) mysql> set global gtid_mode='ON'; Query OK, 0 rows affected (0.00 sec)
2. 基于主库作一个完整备份sql
# mkdir -p /data/bakforslave # innobackupex --defaults-file=/app/mysql/my.cnf --user=root --password='******' /data/bakforslave --parallel=8 --safe-slave-backup --slave-info --no-timestamp
3. 复制数据库到备机shell
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4. 在备机上恢复spa
# tar -xvf bakforslave.tar.gz prepare 备份 # innobackupex --defaults-file=/data/bakforslave/backup-my.cnf --user=root --password='*******' --apply-log --use-memory=4GB /data/bakforslave
若是是修复从库,从库为启动状态应先中止从库,再作以下操做,不然能够跳过 code
# service mysqld stop
还原备份的数据文件
# mv mysqldata mysqldatabk
# mv bakforslave mysqldata
# chown -R mysql:mysql mysqldata
若是是新搭建的从库,此时能够修改主库的my.cnf为本机的my.cnf, 若是为修复,则能够直接使用原有的配置文件或根据须要修改。
# cp /app/mysql/mymaster.cnf /app/mysql/my.cnf # vi /app/mysql/my.cnf ##此处应修改使用一个不一样的server_id,同时能够根据须要修改相关路径及端口配置等。 # service mysqld start ##修改完毕后能够启动mysqld
5. 主库受权用于复制的用户
mysql> grant replication slave,replication client on *.* to repluser@'172.16.10.%' identified by '***';
验证shell 提示符下登录到主库
# mysql -urepluser -p -h172.16.10.88
6. 启动slave
# more /data/mysqldata/xtrabackup_binlog_info mysql-bin.000136 73752825 mysql> CHANGE MASTER TO MASTER_HOST='172.16.10.88', MASTER_USER='repluser', MASTER_PASSWORD='***', MASTER_LOG_FILE='mysql-bin.000136', MASTER_LOG_POS=73752825; mysql> start slave;
7. 验证结果
mysql> show slave status \G *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 172.16.10.88 Master_User: repl2 Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-bin.000136 Read_Master_Log_Pos: 96592981 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 72113 Relay_Master_Log_File: mysql-bin.000136 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: test,bs_com,bs_sysmsg,bs_bak Replicate_Ignore_DB: mysql Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 73824655 Relay_Log_Space: 22840613 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 3815 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 2 Master_UUID: afd6bca4-6636-11e3-9d60-74867ae1c47c Master_Info_File: /data/mysqldata/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: updating Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 1 row in set (0.00 sec)