如何在Docker容器中迁移mysql数据目录？
我有一个运行mysql-5.5主机数据卷的docker容器。 我正在升级我的容器到mysql-5.6。 我正在启动一个具有相同主机卷的新容器。 由于mysql.user表崩溃，MySQL在容器中崩溃。
[ERROR] Fatal error: Can't open and lock privilege tables: Incorrect key file for table 'user'; try to repair it 160523 12:04:13 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended
我尝试了以下来解决这个问题：
root@container# mysqld --skip-grant-tables; root@container# mysql -uroot -ppassword mysql> repair table user USE_FRM; +------------+--------+----------+--------------------------------------------------+ | Table | Op | Msg_type | Msg_text | +------------+--------+----------+--------------------------------------------------+ | mysql.user | repair | info | Key 1 - Found wrong stored record at 0 | | mysql.user | repair | info | Found block that points outside data file at 184 | | mysql.user | repair | info | Found block that points outside data file at 292 | | mysql.user | repair | info | Found block that points outside data file at 296 | | mysql.user | repair | info | Found block that points outside data file at 300 | | mysql.user | repair | info | Found block that points outside data file at 304 | | mysql.user | repair | info | Found block that points outside data file at 308 | | mysql.user | repair | info | Found block that points outside data file at 312 | | mysql.user | repair | info | Found block that points outside data file at 316 | | mysql.user | repair | info | Found block that points outside data file at 340 | | mysql.user | repair | info | Found block that points outside data file at 392 | | mysql.user | repair | info | Found block that points outside data file at 396 | | mysql.user | repair | info | Found block that points outside data file at 400 | | mysql.user | repair | info | Found block that points outside data file at 404 | | mysql.user | repair | info | Found block that points outside data file at 408 | | mysql.user | repair | info | Found block that points outside data file at 412 | | mysql.user | repair | info | Found block that points outside data file at 416 | | mysql.user | repair | info | Found block that points outside data file at 420 | | mysql.user | repair | info | Found block that points outside data file at 448 | | mysql.user | repair | info | Found block that points outside data file at 452 | | mysql.user | repair | info | Found block that points outside data file at 456 | | mysql.user | repair | info | Found block that points outside data file at 460 | | mysql.user | repair | info | Found block that points outside data file at 464 | | mysql.user | repair | info | Found block that points outside data file at 468 | | mysql.user | repair | info | Found block that points outside data file at 472 | | mysql.user | repair | info | Found block that points outside data file at 500 | | mysql.user | repair | info | Found block that points outside data file at 504 | | mysql.user | repair | info | Found block that points outside data file at 508 | | mysql.user | repair | info | Found block that points outside data file at 512 | | mysql.user | repair | info | Found block that points outside data file at 516 | | mysql.user | repair | info | Found block that points outside data file at 520 | | mysql.user | repair | info | Found block that points outside data file at 524 | | mysql.user | repair | info | Found block that points outside data file at 528 | | mysql.user | repair | info | Found block that points outside data file at 556 | | mysql.user | repair | info | Found block that points outside data file at 560 | | mysql.user | repair | info | Found block that points outside data file at 564 | | mysql.user | repair | info | Found block that points outside data file at 568 | | mysql.user | repair | info | Found block that points outside data file at 572 | | mysql.user | repair | info | Found block that points outside data file at 576 | | mysql.user | repair | info | Found block that points outside data file at 580 | | mysql.user | repair | info | Found block that points outside data file at 604 | | mysql.user | repair | info | Found block that points outside data file at 608 | | mysql.user | repair | info | Found block that points outside data file at 612 | | mysql.user | repair | info | Found block that points outside data file at 616 | | mysql.user | repair | info | Found block that points outside data file at 620 | | mysql.user | repair | info | Found block that points outside data file at 624 | | mysql.user | repair | info | Found block that points outside data file at 628 | | mysql.user | repair | info | Found block that points outside data file at 632 | | mysql.user | repair | status | OK | +------------+--------+----------+--------------------------------------------------+ 49 rows in set (0.00 sec)
错误：我无法使用我的用户名/密码login到MySQL服务器。 任何想法，我应该如何升级我的MySQL数据？
root@container# mysql -uroot -ppassword Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 2 Server version: 5.6.30-0ubuntu0.14.04.1 (Ubuntu) Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> exit; Bye root@container# ps -ef|grep mysql root 1509 31492 0 12:15 ? 00:00:00 grep --color=auto mysql mysql 31281 4823 0 12:06 ? 00:00:01 mysqld --skip-grant-tables --user=mysql root@container# kill -9 31281 root@container# ps -ef|grep mysql root 1698 31492 0 12:16 ? 00:00:00 grep --color=auto mysql root@container# mysqld_safe & [1] 1700 root@container# 160523 12:16:34 mysqld_safe Can't log to error log and syslog at the same time. Remove all --log-error configuration options for --syslog to take effect. 160523 12:16:34 mysqld_safe Logging to '/var/log/mysql/error.log'. 160523 12:16:34 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql ^C root@container# mysql -uroot -ppassword Warning: Using a password on the command line interface can be insecure. ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES) root@container#
参考：
MySQL致命错误：无法打开和locking权限表：错误的文件格式'user'https://bugs.mysql.com/bug.php ?id=68385
您可以使用5.5映像启动MySQL并运行mysqldump
docker run --rm --link mysqld mysql:5.5 \ mysqldump -h mysqld --all-databases > /your/host/machine/
然后使用5.6映像启动一个新的容器，并使用SQL转储进行初始化
docker run -v /data/your_dump.sql:/docker-entrypoint-initdb.d/dump.sql mysql:5.6
我相信你需要修改你的dockerfile来在启动mysql之前运行mysql-upgrade 。 尽pipe您可能需要按照您提供的参考资料中所述进行修复。 你只需要运行一次，然后你可以从dockerfile中删除它。 （我假定数据库实际上存储在主机文件系统上，并安装在泊坞窗中。）