Base docker image to run a MySQL database server
To create the image tutum/mysql, execute the following command on the tutum-mysql folder:
docker build -t tutum/mysql .
To run the image and bind to port 3306:
docker run -d -p 3306:3306 tutum/mysql
The first time that you run your container, a new user admin with all privileges
will be created in MySQL with a random password. To get the password, check the logs
of the container by running:
docker logs <CONTAINER_ID>
You will see an output like the following:
========================================================================
You can now connect to this MySQL Server using:
mysql -uadmin -p47nnf4FweaKu -h<host> -P<port>
Please remember to change the above password as soon as possible!
MySQL user 'root' has no password but only allows local connections
========================================================================
In this case, 47nnf4FweaKu is the password allocated to the admin user.
Remember that the root user has no password but it's only accesible from within the container.
You can now test your deployment:
mysql -uadmin -p
Done!
If you want to use a preset password instead of a random generated one, you can
set the environment variable MYSQL_PASS to your specific password when running the container:
docker run -d -p 3306:3306 -e MYSQL_PASS="mypass" tutum/mysql
You can now test your deployment:
mysql -uadmin -p"mypass"
In order to persist the database data, you can mount a local folder from the host on the container to store the database files. To do so:
docker run -d -v /path/in/host:/var/lib/mysql tutum/mysql /bin/bash -c "/usr/bin/mysql_install_db"
This will mount the local folder /path/in/host inside the docker in /var/lib/mysql (where MySQL will store the database files by default). mysql_install_db creates the initial database structure.
Remember that this will mean that your host must have /path/in/host available when you run your docker image!
After this you can start your mysql image but this time using /path/in/host as the database folder:
docker run -d -p 3306:3306 -v /path/in/host:/var/lib/mysql tutum/mysql
In order to migrate your current MySQL server, perform the following commands from your current server:
To dump your databases structure:
mysqldump -u<user> -p --opt -d -B <database name(s)> > /tmp/dbserver_schema.sql
To dump your database data:
mysqldump -u<user> -p --quick --single-transaction -t -n -B <database name(s)> > /tmp/dbserver_data.sql
To import a SQL backup which is stored for example in the folder /tmp in the host, run the following:
sudo docker run -d -v /tmp:/tmp tutum/mysql /bin/bash -c "/import_sql.sh <rootpassword> /tmp/<dump.sql>")
Where <rootpassword> is the root password set earlier and <dump.sql> is the name of the SQL file to be imported.