概要
公式のやることだけ書いたやつです。
手順
$ cd ~/projects
$ mkdir project && cd $_
$ vim Dockerfile
Dockerfile
FROM ruby:2.5
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp
# Add a script to be executed every time the container starts.
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000
# Start the main process.
CMD ["rails", "server", "-b", "0.0.0.0"]
$ vim Gemfile
Gemfile
source 'https://rubygems.org'
gem 'rails', '~>5'
$ touch Gemfile.lock
$ vim entrypoint.sh
entrypoint.sh
#!/bin/bash
set -e
# Remove a potentially pre-existing server.pid for Rails.
rm -f /myapp/tmp/pids/server.pid
# Then exec the container's main process (what's set as CMD in the Dockerfile).
exec "$@"
$ vim docker-compose.yml
docker-compose.yml
version: '3'
services:
db:
image: postgres
volumes:
- ./tmp/db:/var/lib/postgresql/data
web:
build: .
command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
volumes:
- .:/myapp
ports:
- "3000:3000"
depends_on:
- db
$ docker-compose run web rails new . --force --no-deps --database=postgresql
$ ls -l
total 80
-rw-r--r-- 1 hondy12345 staff 453 4 14 11:08 Dockerfile
-rw-r--r-- 1 hondy12345 staff 2214 4 14 11:27 Gemfile
-rw-r--r-- 1 hondy12345 staff 5355 4 14 11:28 Gemfile.lock
-rw-r--r-- 1 hondy12345 staff 374 4 14 11:27 README.md
-rw-r--r-- 1 hondy12345 staff 227 4 14 11:27 Rakefile
drwxr-xr-x 10 hondy12345 staff 320 4 14 11:27 app
drwxr-xr-x 9 hondy12345 staff 288 4 14 11:28 bin
drwxr-xr-x 16 hondy12345 staff 512 4 14 11:27 config
-rw-r--r-- 1 hondy12345 staff 130 4 14 11:27 config.ru
drwxr-xr-x 3 hondy12345 staff 96 4 14 11:27 db
-rw-r--r-- 1 hondy12345 staff 305 4 14 11:27 docker-compose.yml
-rw-r--r-- 1 hondy12345 staff 202 4 14 11:27 entrypoint.sh
drwxr-xr-x 4 hondy12345 staff 128 4 14 11:27 lib
drwxr-xr-x 3 hondy12345 staff 96 4 14 11:27 log
-rw-r--r-- 1 hondy12345 staff 63 4 14 11:27 package.json
drwxr-xr-x 9 hondy12345 staff 288 4 14 11:27 public
drwxr-xr-x 3 hondy12345 staff 96 4 14 11:27 storage
drwxr-xr-x 11 hondy12345 staff 352 4 14 11:27 test
drwxr-xr-x 6 hondy12345 staff 192 4 14 11:27 tmp
drwxr-xr-x 3 hondy12345 staff 96 4 14 11:27 vendor
$ sudo chown -R $USER .
$ docker-compose build
$ vim config/database.yml
config/database.yml
default: &default
adapter: postgresql
encoding: unicode
host: db
username: postgres
password:
pool: 5
development:
<<: *default
database: project_development
test:
<<: *default
database: project_test
$ docker-compose up
$ docker-compose run web rake db:create