Docker images for Decidim

Images are mirrored on Docker Hub and Github Container Registry.

Image naming has changed recently.

We now use different names for images with different purposes, while previously we were using tagging to distinguish between them. CIs and scripts will need to be updated accordingly on updates after v0.23.1.

Biggest naming change:

The app generator gem used to be called decidim and is now called decidim-generator. There's now a new decidim image for a fully functioning generated Decidim app.

Here's the complete list of images and their purposes:

Images available

decidim

Decidim app pre-generated with core modules.

Tagged as decidim:latest or decidim:<version> (eg: decidim:0.23.1).

decidim-generator

The decidim gem with all necessary environment for running it.

Tagged as decidim-generator:latest or decidim-generator:<version> (eg: decidim-generator:0.23.1).

decidim-test

The above gem environment plus tooling for testing.

Tagged decidim-test:latest or decidim-test:<version> (eg: decidim-test:0.23.1).

decidim-dev

The above plus more configuration for running local dev environment.

Tagged decidim-dev:latest or decidim-dev:<version> (eg: decidim-dev:0.23.1).

Hello World with docker-compose

This repo includes a docker-compose.yml file with:

• a Decidim service (using the decidim:latest image)
• a Postgres service
• a Redis service

By cloning the repo and then running docker-compose up, you'll get a fully functional Decidim app complete with seed data, accessible at http://localhost:3000.

git clone git@github.com:decidim/docker.git decidim-docker
cd decidim-docker
docker-compose up

It'll take a couple of minutes to run through all migrations and seeds. At the end you should see:

(...lots of migrating and seeding...)
decidim_1  | Puma starting in single mode...
decidim_1  | * Version 4.3.5 (ruby 2.6.6-p146), codename: Mysterious Traveller
decidim_1  | * Min threads: 5, max threads: 5
decidim_1  | * Environment: development
decidim_1  | * Listening on tcp://0.0.0.0:3000
decidim_1  | Use Ctrl-C to stop

Note: in case you run into SSL redirection errors, opening it on an incognito window usually solves the problem.

Using the decidim app image individually

Locally, with running local database

docker run -it --rm \
  -e DATABASE_USERNAME=postgres \
  -e DATABASE_PASSWORD=postgres \
  -e RAILS_ENV=development \
  -p 3000:3000 \
  ghcr.io/decidim/decidim:latest

In production

docker run -it --rm \
  -e DATABASE_URL="postgres://user:pass@postgres-host/decidim-production-db" \
  -p 3000:3000 \
  ghcr.io/decidim/decidim:latest

Using the decidim-generator image

With this image you can generate a new Decidim application:

APP_NAME=HelloWorld
IMAGE=ghcr.io/decidim/decidim-generator:latest
docker run -it -v "$(pwd):/code" ${IMAGE} decidim ${APP_NAME}
sudo chown -R $(whoami): ${APP_NAME}

From here on you can follow the steps on the Getting Started guide.