Docker for Ruby on Rails

database.yml

default: &default
  adapter: postgresql 
  encoding: unicode 
  pool: 5 
  timeout: 5000 
  username: postgres 
  host: postgres
  port: 5432

development:
  <<: *default
  database: app_development

test:
  <<: *default
  database: app_test
 
staging:
  <<: *default
  database: staging_test

docker-compose.yml

version: '3'

services:
  webpacker:
    build: .
    command: bundle exec bin/webpack-dev-server
    environment:
      - WEBPACKER_DEV_SERVER_HOST=0.0.0.0
    volumes:
      - .:/app
    ports:
      - 8080:8080

  app:
    build: .
    command: /bin/sh -c "rm -f /app/tmp/pids/server.pid && rails server -b 0.0.0.0"
    working_dir: /app 
    environment:
      - RAILS_ENV=development
      - BUNDLE_JOBS=20
      - BUNDLE_RETRY=5
      - WEBPACKER_DEV_SERVER_HOST=webpacker
    volumes:
      - .:/app
    ports:
      - 3000:3000
    links:
      - postgres
    depends_on:
      - webpacker
      
  postgres:
    image: postgres:9.4
    volumes:
      - /var/lib/postgresql/data
    ports:
      - 5432:5432

Dockerfile

FROM ruby:2.3.1

MAINTAINER Thadeu Esteves Jr <eu@thadeuesteves.com.br>

# libs essentials
RUN apt-get update && apt-get install -y \ 
  build-essential \
  libpq-dev \
  postgresql-client-9.4 \
  libxml2-dev \
  libxslt1-dev

# Node.js
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash - \
&& apt-get install -y nodejs

# Yarn
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
&& echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list

RUN apt-get update && apt-get install -y yarn

RUN export TZ=America/Araguaina

RUN mkdir -p /app 
WORKDIR /app

RUN bundle config github.https true

COPY . ./
RUN rm -rf Gemfile.lock
RUN gem install bundler && bundle install --jobs 20 --retry 5

EXPOSE 3000
EXPOSE 8080

Fluxo

# Passo-a-Passo

# Primeiro executar o build para baixar as imagens

```bash
docker-compose build
```

# Start a maquina default
```bash
docker-machine start default
```

# Start a ip da maquina default
```bash
docker-machine ip default
```

# Depois subir os services criados com docker-compose

```bash
docker-compose up
```

# configurar o arquivo database.yml

# Cria a base de dados e as primeiras migrates

```bash
docker-compose run app rake db:create db:migrate
```

# Todo comando que usa rake ou rails ou qualquer outro bin relacionado ao rails deve ser executado dentro de

```bash
docker-compose run app
```

Install latest docker-compose

Siga o tutorial da documentação
https://docs.docker.com/compose/install/#install-compose

para mysql database.yml

default: &default
adapter: mysql2
encoding: utf8
username: root
host: mysql

development:
<<: *default
database: aedes_development

docker-compose.yml MySQL

version: '3'

services:
app:
build: .
command: /bin/sh -c "rm -f /app/tmp/pids/server.pid && rails server -p 3000 -b 0.0.0.0"
volumes:
- .:/app
ports:
- "3000:3000"
links:
- mysql

mysql:
image: mysql:5.7
ports:
- 3306:3306
environment:
MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'

Dockerfile para MySQL

FROM ruby:2.3.1

MAINTAINER Thadeu Esteves Jr eu@thadeuesteves.com.br

libs essentials

RUN apt-get update && apt-get install -y \
build-essential
mysql-client
libmysqlclient-dev
libxml2-dev
libxslt1-dev

Node.js

RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
&& apt-get install -y nodejs

RUN export TZ=America/Araguaina

RUN mkdir -p /app
WORKDIR /app

RUN bundle config github.https true

COPY Gemfile ./
RUN rm -rf Gemfile.lock
RUN gem install bundler && bundle install --jobs 20 --retry 5

COPY . ./
EXPOSE 3000