環境:
OS:Centos 7
1.備份
/opt/xtrabackup-8.0.7/bin/xtrabackup --defaults-file=/opt/mha/mysql8/conf/my.cnf --host=localhost --user=root --password=mysql --port=13306 --socket=/opt/mha/mysql8/mysql.sock --backup --target-dir=/opt/mha/xbackup/
2.將備份文件目錄打包傳到目的機器
[root@localhost mha]# cd /opt/mha
[root@localhost mha]# tar -cvf xbackup.tar ./xbackup/
[root@localhost mha]# scp xbackup.tar root@192.168.1.135:/opt/mha/
3.恢復前期准備
3.1 解壓文件
[root@localhost mha]# tar -xvf xbackup.tar
3.2 停掉目的機器上的mysql
/opt/mha/mysql8/bin/mysqladmin -h 127.0.0.1 -uroot -pmysql -P13306 -S /opt/mha/mysql8/mysql.sock shutdown
3.2 備份之前的數據文件目錄,並創建一個空目錄
[root@localhost mysql8]# cd /opt/mha/mysql8
[root@host02 mysql5718]# mv data bakdata
[root@host02 mysql5718]# mkdir data
這里要是binlog日志不是放在data目錄的話,需要將binlog日志要刪除掉
4.xtrabackup恢復
/opt/xtrabackup-8.0.7/bin/xtrabackup --defaults-file=/opt/mha/mysql8/conf/my.cnf --user=root --prepare --target-dir=/opt/mha/xbackup/
/opt/xtrabackup-8.0.7/bin/xtrabackup --defaults-file=/opt/mha/mysql8/conf/my.cnf --user=root --copy-back --target-dir=/opt/mha/xbackup/
5.修改目錄屬性啟動數據庫：
[root@localhost mysql8]# cd /opt/mha/mysql8
[root@localhost mysql8]# chown -R mysql:mysql ./data ##數據文件
[root@localhost mysql8]# chown -R mysql:mysql ./mysqllog ##binlog存儲路徑
[root@localhost mysql8]# su - mysql
[mysql@localhost ~]$ /opt/mha/mysql8/bin/mysqld_safe --defaults-file=/opt/mha/mysql8/conf/my.cnf --user=mysql &
6.配置從庫
在從庫上執行
/opt/mha/mysql8/bin/mysql -h localhost -uroot -pmysql -P13306 -S /opt/mha/mysql8/mysql.sock
change master to master_host='192.168.1.134',
master_port=13306,
master_user='repl',
master_password='mysql',
master_log_file='binlog.000006',
master_log_pos=195;
這里的master_log_file和master_log_post可以從xtrabackup_info的信息找到
[mysql@localhost data]$ more xtrabackup_info
uuid = 7b3c84a0-e021-11e9-8c80-525400c8dc1f
name =
tool_name = xtrabackup
tool_command = --defaults-file=/opt/mha/mysql8/conf/my.cnf --host=localhost --user=root --password=... --port=13306 --socket=/opt/mha/mysql8/mysql.sock --backup --target-dir=/opt/mha/xbackup/
tool_version = 8.0.7
ibbackup_version = 8.0.7
server_version = 8.0.17
start_time = 2019-09-26 13:49:56
end_time = 2019-09-26 13:50:01
lock_time = 0
binlog_pos = filename 'binlog.000006', position '195', GTID of the last change 'bd3f495f-cfb6-11e9-9e6f-525400c8dc1f:1-22'
innodb_from_lsn = 0
innodb_to_lsn = 19847436
partial = N
incremental = N
format = file
compressed = N
encrypted = N
7.啟動從庫
mysql> start slave;
遇到的問題:
報錯信息:
error connecting to master 'repl@192.168.1.134:13306' - retry-time: 60 retries: 1 message: Authentication plugin 'caching_sha2_password' reported error: Authentication requires secure connection.
解決辦法:
alter user 'repl'@'%' identified with mysql_native_password by 'mysql';
flush privileges;