mysql - 如何迁移 docker 容器中的 MySQL 数据目录？

Question

我有一个运行 MySQL-5.5 和主机数据量的 docker 容器。我正在将我的容器升级到 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

我尝试了以下方法来解决这个问题:

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/密码登录 MySQL 服务器。关于我应该如何升级我的 MySQL 数据的任何想法？

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# 

引用:

MySQL Fatal error: Can't open and lock privilege tables: Incorrect file format 'user' https://bugs.mysql.com/bug.php?id=68385

Answer 1

您可以使用 5.5 镜像启动 MySQL 并针对它运行 mysqldump

docker run --rm --link mysqld mysql:5.5 \
       mysqldump -h mysqld --all-databases > /your/host/machine/

然后使用 5.6 镜像启动一个新容器并使用 SQL 转储对其进行初始化

docker run -v /data/your_dump.sql:/docker-entrypoint-initdb.d/dump.sql mysql:5.6