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How to use this image
start a mysql server instance

docker run --name some-mysql -e MYSQL_ROOT_PASSWORD=mysecretpassword -d mysql

This image includes EXPOSE 3306 (the standard MySQL port), so container linking will make it automatically available to the linked containers (as the following examples illustrate).
connect to it from an application

docker run --name some-app --link some-mysql:mysql -d application-that-uses-mysql

… or via mysql

docker run -it --link some-mysql:mysql --rm mysql sh -c 'exec mysql -h"$MYSQL_PORT_3306_TCP_ADDR" -P"$MYSQL_PORT_3306_TCP_PORT" -uroot -p"$MYSQL_ENV_MYSQL_ROOT_PASSWORD"'

Environment Variables

The mysql image uses several environment variables which are easy to miss. While not all the variables are required, they may significantly aid you in using the image.
MYSQL_ROOT_PASSWORD

This is the one environment variable that is required. This environment variable should be what you want to set the password for the root user to be. In the above example, it is being set to “mysecretpassword”.
MYSQL_USER, MYSQL_PASSWORD

These optional environment variables are used in conjunction to both create a new user and set that user's password, which will subsequently be granted all permissions for the database specified by the optional MYSQL_DATABASE variable. Note that if you only have one of these two environment variables, then neither will do anything – these two are required to be used in conjunction with one another.

Additionally, there is no need to specify MYSQL_USER with root, as the root user already exists by default, and the password of that user is controlled by MYSQL_ROOT_PASSWORD (see above).
MYSQL_DATABASE

This optional environment variable denotes the name of a database to create. If a user/password was supplied (via the MYSQL_USER and MYSQL_PASSWORD environment variables) then that user will be granted (via GRANT ALL) access to this database.
Caveats

If there is no database initialized when the container starts, then a default database will be created. While this is the expected behavior, this means that it will not accept incoming connections until such initialization completes. This may cause issues when using automation tools, such as docker-compose, which start several containers simultaneously.
Supported Docker versions

This image is officially supported on Docker version 1.5.0.

Support for older versions (down to 1.0) is provided on a best-effort basis.
User Feedback
Issues

If you have any problems with or questions about this image, please contact us through a GitHub issue.

You can also reach many of the official image maintainers via the #docker-library IRC channel on Freenode.
Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, we recommend discussing your plans through a GitHub issue, especially for more ambitious contributions. This gives other contributors a chance to point you in the right direction, give you feedback on your design, and help you find out if someone else is working on the same thing.

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phox
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