Dru

DRU is a run utility to work on your projects with docker-compose where you can't put your config files inside the folder and also enhance the docker-compose command with custom commands, custom aliases, and environments support.

Sometimes when we are working on projects, we can't put docker related configuration files into the project folder or push it into our version control system.

Sure, we can always put the docker configuration files in a different place, but every time we have to run a command, it looks like:

$ docker-compose -f ~/config_folder/docker-compose.yml up

and if we have another docker configuration for a different environment the things go even worst:

$ docker-compose -f ~/config_folder/docker-compose.yml -f ~/config_folder/docker-compose.test.yml up

By following some simple conventions, DRU let we run the first command with:

$ dru up

and the second will be like:

$ dru -e test up

Furthermore, if we need to access the docker container shell, with vanilla docker-compose:

$ docker-compose -f ~/config_folder/docker-compose.yml run --rm --entrypoint sh container_name

with DRU:

$ dru shell container_name

$ gem install dru

Run:

$ dru help

for the list of the available commands.

All commands follow the same conventions. When you run a DRU command, by default it will look for a docker-compose.yml file into the ~/.dru/project_folder where project_folder has the same name as the current working directory.

Suppose that you are in a directory called example_project, when you run a DRU command (e.g. dru up) it will search for a docker-compose.yml file into the ~/.dru/example_project folder.

DRU also supports environments, that means that if you add the -e test option, it will combine the ~/.dru/example_project/docker-compose.yml and ~/.dru/example_project/docker-compose.test.yml into a single configuration.

Essentially it will run docker-compose -f ~/.dru/example_project/docker-compose.yml -f ~/.dru/example_project/docker-compose.test.yml when the second file name is given by the environment option. See docker-compose documentation for more informations.

To override the default configuration you have to create the file .druconfig under your home folder:

# ~/.druconfig

# default: ~/.dru if you like, you can set a custom location (path) for your docker configurations projects like ~/docker-config
docker_projects_folder: ~/.dru

# optional: use this if you want to create custom aliases
alias:
  shell: run --rm --entrypoint sh

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/nebulab/dru. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

DRU is copyright © 2019 Nebulab. It is free software, and may be redistributed under the terms specified in the license.

DRU is funded and maintained by the Nebulab team.

We firmly believe in the power of open-source. Contact us if you like our work and you need help with your project design or development.