Ruby on Rails
도커의 레일

소개

도커 및 도커 작성

우선 Dockerfile 을 만들어야합니다. 좋은 예가 Nick Janetakis의 블로그 에서 찾아 볼 수 있습니다.

이 코드에는 시작 시점에 도커 시스템에서 실행될 스크립트가 들어 있습니다. 이러한 이유 때문에 필요한 라이브러리를 모두 설치하고 Puma (RoR dev server)

# Use the barebones version of Ruby 2.3.
FROM ruby:2.3.0-slim

# Optionally set a maintainer name to let people know who made this image.
MAINTAINER Nick Janetakis <[email protected]>

# Install dependencies:
# - build-essential: To ensure certain gems can be compiled
# - nodejs: Compile assets
# - libpq-dev: Communicate with postgres through the postgres gem
RUN apt-get update && apt-get install -qq -y --no-install-recommends \
      build-essential nodejs libpq-dev git


# Set an environment variable to store where the app is installed to inside
# of the Docker image. The name matches the project name out of convention only.
ENV INSTALL_PATH /mh-backend
RUN mkdir -p $INSTALL_PATH

# This sets the context of where commands will be running in and is documented
# on Docker's website extensively.
WORKDIR $INSTALL_PATH

# We want binstubs to be available so we can directly call sidekiq and
# potentially other binaries as command overrides without depending on
# bundle exec.
COPY Gemfile* $INSTALL_PATH/

ENV BUNDLE_GEMFILE $INSTALL_PATH/Gemfile
ENV BUNDLE_JOBS 2 
ENV BUNDLE_PATH /gembox

RUN bundle install

# Copy in the application code from your work station at the current directory
# over to the working directory.
COPY . .

# Ensure the static assets are exposed to a volume so that nginx can read
# in these values later.
VOLUME ["$INSTALL_PATH/public"]

ENV RAILS_LOG_TO_STDOUT true


# The default command that gets run will be to start the Puma server.
CMD bundle exec puma -C config/puma.rb

또한 docker-compose를 사용합니다.이를 위해 docker-compose.yml . 이 파일에 대한 설명은 Rails와의 통합보다 더한 도커 작성법이 될 것이며 여기서 다루지 않을 것입니다.

version: '2'

services:
  backend:
    links:
      - #whatever you need to link like db
    build: .
    command: ./scripts/start.sh
    ports:
      - '3000:3000'
    volumes:
      - .:/backend
    volumes_from:
      - gembox
    env_file:
      - .dev-docker.env
    stdin_open: true
    tty: true

이 두 파일 만 있으면 docker-compose up 를 실행하고 docker-compose up 수 있습니다.