contao-docker

Migration

Navigate to the docker/migration directory
Run docker-compose -f step-1.yml up -d
Open the contao manager in a browser
Enter the desired username/password and click on Create Account
Wait for the system check to finish, then click on Setup
Choose Contao 4.9 (Long Term Support) as Version and Minimal Installation (Core only) as Initial Setup, click Finish
Wait until composer installed all dependencies
Copy the generated files to the host with docker cp -a -L contao:/var/www/html/contao ./
Complete step one with docker-compose -f step-1.yml down

Copy .env.example to .env
Enter the desired mariadb config in .env
Copy the old .sql dump to the initdb directory
Copy the old files and templates directories to the contao directory
Run docker-compose -f step-2.yml up -d
Open the contao manager in a browser
Login with the credentials from step one
Click on Update Database and Accept license
Enter a new password (Can be the same as for the cantao manager)
Set host to mariadb and the rest with the mariadb credentials from .env, then click Save settings
Contao will check for needed database migrations, when finished click Update database
If there are still actions selected with a checkmark click Update database again, repeat until there are no checkmarks selected
Navigate to the cantao backend and login with your credentials
Install any needed packages in the contao manager
Open phpmyadmin in a browser and export a .sql dump of the mariadb database
Complete the migration with docker-compose -f step-2.yml down

You now have the migrated contao directory and the .sql dump