Docker MySQL主机卷

Question

我发现有对码头工人的MySQL官方图片在这里 。 不幸的是，我无法使用主机卷启动容器。 我试过以下脚本。

DB_ROOT_PASS="myPassword"
DB_NAME="myDatabase"
DATA_DIR="$HOME/mysql_data"

mkdir -p $DATA_DIR
mkdir -p $DATA_DIR/conf.d

cd $DATA_DIR
wget -O my.cnf http://pastebin.com/raw.php?i=aV4pXRQD

sudo docker run \
-e MYSQL_ROOT_PASSWORD=$DB_ROOT_PASS \
-e MYSQL_DATABASE=$DB_NAME \
-p 3306:3306 \
-v $DATA_DIR:/etc/mysql \
mysql

这导致以下输出：

Running mysql_install_db ...
Installing MySQL system tables...2015-02-14 07:49:52 0 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
2015-02-14 07:49:52 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
OK

Filling help tables...2015-02-14 07:49:55 0 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
2015-02-14 07:49:55 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

  /usr/bin/mysqladmin -u root password 'new-password'
  /usr/bin/mysqladmin -u root -h 2efc65e86051 password 'new-password'

Alternatively you can run:

  /usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default.  This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:

  cd /usr ; /usr/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl

  cd mysql-test ; perl mysql-test-run.pl

Please report any problems at http://bugs.mysql.com/

The latest information about MySQL is available on the web at

  http://www.mysql.com

Support MySQL by buying support/licenses at http://shop.mysql.com

WARNING: Found existing config file /usr/my.cnf on the system.
Because this file might be in use, it was not replaced,
but was used in bootstrap (unless you used --defaults-file)
and when you later start the server.
The new default config file was created as /usr/my-new.cnf,
please compare it with your file and take the changes you need.

WARNING: Default config file /etc/mysql/my.cnf exists on the system
This file will be read by default by the MySQL server
If you do not want to use this, either remove it, or use the
--defaults-file argument to mysqld_safe when starting the server

Finished mysql_install_db
2015-02-14 07:49:57 0 [Warning] Using unique option prefix key_buffer instead of key_buffer_size is deprecated and will be removed in a future release. Please use the full name instead.
2015-02-14 07:49:57 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).

我也试过没有创建conf.d目录或my.cnf文件，这也导致其他错误。

为什么需要一个卷？

主机卷提供“近金属”磁盘性能以及数据持久性，这对MySQL数据库很重要。 因此，不希望从容器备份数据，或使用“数据容器”模式。

题：

如何更新脚本以启动具有主机卷的Docker MySQL容器，以便MySQL服务正确启动？ 也许传递一个init脚本或向卷中添加更多数据？

上下文

• Ubuntu 14.04 64位服务器
• Docker版本1.5.0，构建a8a31ef

Answer 1

有几个问题，主要问题是正在下载的原始配置文件具有bind-address设置，导致mysql服务无法从主机外部连接。 我已经更新了设置（注释掉了）并使服务正常运行，但service mysql status仍然表明MySQL Community Server 5.6.23 is not running. 即使它是。 我99％肯定这是因为“集装箱化”效应。

此外，数据不保存在/etc/mysql ，因此为了实现持久性和更高的性能，我们需要添加另一个卷。 最终的工作脚本如下：

DB_ROOT_PASS="myPassword"
DB_NAME="myDatabase"
CONFIG_DIR="$HOME/mysql_config"
DATA_DIR="$HOME/mysql_data"

mkdir -p $DATA_DIR
mkdir -p $CONFIG_DIR
mkdir -p $CONFIG_DIR/conf.d

cd $CONFIG_DIR
sudo wget -O my.cnf http://pastebin.com/raw.php?i=aV4pXRQD

sudo docker run \
-e MYSQL_ROOT_PASSWORD=$DB_ROOT_PASS \
-e MYSQL_DATABASE=$DB_NAME \
-p 3306:3306 \
-v $CONFIG_DIR:/etc/mysql \
-v $DATA_DIR:/var/lib/mysql \
-d \
mysql

Answer 2

你看到这条消息的原因

MySQL Community Server 5.6.23 is not running.

是因为命令ps未加载到此容器中。 service mysql status命令（以及所有服务状态命令）依赖于ps来检查状态。

当我运行service mysql status ，我得到的完整消息是：

/etc/init.d/mysql: line 41: ps: command not found
MySQL Community Server 5.6.23 is not running.

事实上，如果我尝试直接运行ps，我会得到

bash: ps: command not found

不确定为什么他们没有在这个容器中提供ps，可能值得在它上面打开一个问题。