How to Set Up a MySQL Database Container with Docker Machine

2020-07-17 13:50:05 | #sysadmin #database

Tested On

  • Linux Ubuntu 20.04

Problem: You want a MySQL database that you can quickly spin up and down for testing purposes.

Solution: We're going to use Docker Machine to deploy a MySQL database running inside a container. This has the added advantage of compartmentalizing all of the MySQL dependencies, making it easier to clean up when you're finished.

Creating the MySQL DB Container

Follow these instructions to install docker-machine on your preferred operating system. Make sure to replace Ch4ng3M3 with your preferred password.

# Create virtual machine
docker-machine create --driver virtualbox --virtualbox-disk-size "40000" dev

# Set environment variables
docker-machine env dev
eval "$(docker-machine env dev)"

# Create postgresql database container (make sure to replace Ch4ng3M3 with your preferred password)
docker run --name mysqldb -e MYSQL_ROOT_PASSWORD=Ch4ng3M3 -p 3306:3306 -d mysql

# List containers to confirm db is running
docker ps

Your terminal should output the following information about your docker container:

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                               NAMES
f69c5c5f84cb        mysql               "docker-entrypoint.s…"   5 seconds ago       Up 4 seconds>3306/tcp, 33060/tcp   mysqldb

If you get the following error, this means something is already running on port 3306. It could be another mysql instance, a mysql docker container, or a separate process entirely.

docker: Error response from daemon: driver failed programming external connectivity on endpoint mysqldb (ceb965e08c68a3e38f868346a2be60fd0dae125ed0685e8a5ac3c202ac70cd4c): Bind for failed: port is already allocated.

Please refer to this article to identify and terminate the process running on port mysql. If you would rather keep that existing process running, you can instead run the mysqldb docker container on a different port, such as 3307, with the following commands.

# Delete the mysqldb container
docker rm -f mysqldb

# Run mysqldb container on port 5433
docker run --name mysqldb -e MYSQL_ROOT_PASSWORD=Ch4ng3M3 -p 3306:3307 -d mysql

Connecting to the DB Container

# Get the virtual machine's IP address
docker-machine ip dev

# Identify which port the mysqldb container is running on
docker ps

# Install mysql-client if you haven't already
sudo apt-get install mysql-client

# Connect to the DB
# Make sure to substitute IP_ADDRESS with the dev docker machine's ip...
# ...and PORT_NUMBER with the mysqldb container port
mysql -uroot -pCh4ng3M3 -h IP_ADDRESS -P PORT_NUMBER

Once you're connected, you'll be able to run your queries. If you want to connect from a program you've written, you can use the same connection parameters.


That's the end of this tutorial. We hope you found it helpful. Make sure to check out our other tutorials, as well.


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