docker-compose: run rails db:setup and rake tasks to init data - docker-compose

Question

I can't find the way to execute the following commands from a docker-compose.yml file:
rails db:setup
rails db:init_data.
I tried to do that as follows and it failed:
version: '3'
services:
web:
build: .
links:
- database
- redis
ports:
- "3000:3000"
volumes:
- .:/usr/src/app
env_file:
- .env/development/database
- .env/development/web
command: ["rails", "db:setup"]
command: ["rails", "db:init_data"]
redis:
image: redis
database:
image: postgres
env_file:
- .env/development/database
volumes:
- db-data:/var/lib/postgresql/data
volumes:
db-data:
Any idea on what's going wrong here ? Thank you.
The code source is on the GitHub.

Answer 1

You can do two things in my opinion:
Change command: to the following line, because two commands are not allowed in compose file:
command:
- /bin/bash
- -c
- |
rails db:setup
rails db:init_data
Use supervisord app: supervisord web page

Answer 2

The solution that worked for me was to remove CMD commad from Dockerfile because using command option in docker-compose.yml would have overridden CMD command.
So, Docker file will look like that:
FROM ruby:2.5.1
LABEL maintainer="DECATHLON"
RUN apt-get update -yqq
RUN apt-get install -yqq --no-install-recommends nodejs
COPY Gemfile* /usr/src/app/
WORKDIR /usr/src/app
RUN bundle install
COPY . /usr/src/app/
Then add command option to docker-compose file:
version: '3'
services:
web:
build: .
links:
- database
- redis
ports:
- "3000:3000"
volumes:
- .:/usr/src/app
env_file:
- .env/development/database
- .env/development/web
command:
- |
rails db:reset
rails db:init_data
rails s -p 3000 -b '0.0.0.0'
redis:
image: redis
database:
image: postgres
env_file:
- .env/development/database
volumes:
- db-data:/var/lib/postgresql/data
volumes:
db-data:
If the above solution does not work for somebody, there is an alternative solution:
Create a shell script in the project route and name it entrypoint.sh, for example:
#!/bin/bash
set -e
bundle exec rails db:reset
bundle exec rails db:migrate
exec "$#"
Declare entrypoint option in dpcker-compose file:
v
version: '3'
services:
web:
build: .
entrypoint:
- /bin/sh
- ./entrypoint.sh
depends_on:
- database
- redis
ports:
- "3000:3000"
volumes:
- .:/usr/src/app
env_file:
- .env/development/database
- .env/development/web
command: ['./wait-for-it.sh', 'database:5432', '--', 'bundle', 'exec', 'rails', 's', '-p', '3000', '-b', '0.0.0.0']
database:
image: postgres:9.6
env_file:
- .env/development/database
volumes:
- db-data:/var/lib/postgresql/data
volumes:
db-data:
I also user wait-for-it script to ensure the DB is started.
Hope this helps. I pushed the modifications to the Github repo. Sorry for some extra letters left in the text before code blocks, - for some unknown reasons, the code markdown didn't work, so I left them to get it working.