1.停掉從庫192.168.1.23
[root@dev-env23 tmp]# service mysqld stop
Stopping mysqld: [ OK ]
2.主庫全備份
cd /opt/xtrabackup247/bin
./innobackupex --defaults-file=/etc/my.cnf --user=root --socket=/var/lib/mysql/mysql.sock --password=yeemiao1117 -P3306 /opt/xtrabackup_file/
備份完成後會有提示ok,如下:
190124 10:50:07 Executing UNLOCK TABLES
190124 10:50:07 All tables unlocked
190124 10:50:07 Backup created in directory '/opt/xtrabackup_file/2019-01-24_10-46-06/'
MySQL binlog position: filename 'binlog.000011', position '587445616'
190124 10:50:07 [00] Writing backup-my.cnf
190124 10:50:07 [00] ...done
190124 10:50:07 [00] Writing xtrabackup_info
190124 10:50:07 [00] ...done
xtrabackup: Transaction log of lsn (296778142671) to (296778142701) was copied.
190124 10:50:07 completed OK!
完成備份後會以日期生成備份目錄,我們把該目錄tar並scp到遠端備份伺服器
[root@dev-env-22 xtrabackup_file]# tar -cvf /home/xtrabackup0124.tar ./2019-01-24_10-46-06/
[root@dev-env-22 home]# scp xtrabackup0124.tar [email protected]:/home/
----------------------------備庫恢復------------------------
1.備庫解壓縮
[root@dev-env23 home]# cd /home
[root@dev-env23 home]# tar -xvf xtrabackup0124.tar
2.清空原來的資料檔案目錄和日誌目錄
檢視/etc/my.cnf配置檔案找到資料檔案目錄
datadir=/home/mysql/data
relay_log=/home/mysql/logs/relay-bin
我這裡是採用重建目錄的方式
[root@dev-env23 mysql]# mv data bakdata
[root@dev-env23 mysql]# mkdir data
[root@dev-env23 mysql]# mv logs baklogs
[root@dev-env23 mysql]# mkdir logs
3.恢復(備庫也事先安裝好xtrabackup軟體)
cd /opt/xtrabackup247/bin
./innobackupex --defaults-file=/etc/my.cnf --user=root --apply-log /home/2019-01-24_10-46-06
這步完成後也有ok提示
xtrabackup: starting shutdown with innodb_fast_shutdown = 1
InnoDB: FTS optimize thread exiting.
InnoDB: Starting shutdown...
InnoDB: Shutdown completed; log sequence number 296778145738
190124 11:08:12 completed OK!
./innobackupex --defaults-file=/etc/my.cnf --user=root --copy-back --rsync /home/2019-01-24_10-46-06
完成後有ok提示
190124 11:11:58 [01] ...done
190124 11:11:58 completed OK!
4.修改許可權
[root@dev-env23 mysql]#cd /home/mysql
[root@dev-env23 mysql]#chown -R mysql:mysql ./data
[root@dev-env23 mysql]#chown -R mysql:mysql ./logs
5.啟動資料庫
[root@dev-env23 mysql]# service mysqld start
190124 11:14:14 mysqld_safe error: log-error set to '/home/mysql/logs/mysqld.log', however file don't exists. Create writable for user 'mysql'.
MySQL Daemon failed to start.
Starting mysqld: [FAILED]
[root@dev-env23 mysql]#
提示沒有mysqld.log日誌檔案,建立即可
[root@dev-env23 mysql]# cd /home/mysql/logs
[root@dev-env23 logs]# echo>mysqld.log
[root@dev-env23 logs]# chown mysql:mysql mysqld.log
再次啟動
[root@dev-env23 logs]# service mysqld start
Starting mysqld: [ OK ]
[root@dev-env23 logs]#
6.找到主從同步的引數值
master_log_file和master_log_pos
這兩個引數可以在xtrabackup備份目錄下的檔案中查詢到
[root@dev-env23 data]# cd /home/2019-01-24_10-46-06
[root@host02 2017-09-18_15-53-15]# more xtrabackup_binlog_info
[root@dev-env23 2019-01-24_10-46-06]# more xtrabackup_binlog_info
binlog.000011 587445616
7.執行主從複製
[root@dev-env23]# mysql -h localhost -uroot -pyeemiao1117
change master to master_host='192.168.1.22',
master_port=3306,
master_user='repl',
master_password='repl',
master_log_file='binlog.000011',
master_log_pos=587445616;
8.啟動複製
start slave