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The official documentation can be found here.

Redis – Run bundle install after adding/removing a new gem when using docker-compose

I am new to docker and was trying to integrate docker with my rails app. I was following this doc

I was able to setup the services but I am facing a problem.

Whenever I add a Gem to my Gemfile I get error in docker-compose up saying

sidekiq_1  | bundler: failed to load command: sidekiq (/usr/local/bundle/bin/sidekiq)
sidekiq_1  | /usr/local/bundle/gems/bundler-2.2.3/lib/bundler/resolver.rb:309:in `block in verify_gemfile_dependencies_are_found!': Could not find gem 'awesome_print' in any of the gem sources listed in your Gemfile. (Bundler::GemNotFound)

Dockerfile

FROM ruby:3.0.0-alpine3.12

ENV BUNDLER_VERSION=2.2.3

RUN apk add --update --no-cache 
      binutils-gold 
      build-base 
      curl py-pip 
      curl 
      file 
      g++ 
      gcc 
      git 
      less 
      libstdc++ 
      libffi-dev 
      libc-dev 
      linux-headers 
      libxml2-dev 
      libxslt-dev 
      libgcrypt-dev 
      make 
      netcat-openbsd 
      nodejs 
      openssl 
      pkgconfig 
      python3 
      tzdata 
      yarn

RUN gem install bundler -v 2.2.3

WORKDIR /app

COPY Gemfile Gemfile.lock ./

RUN bundle config build.nokogiri --use-system-libraries

RUN bundle check || bundle install

COPY package.json yarn.lock ./

RUN yarn install --check-files

COPY . ./

ENTRYPOINT ["./entrypoints/docker-entrypoint.sh"]

docker-compose.yml

version: '3.6'

services:
  app:
    build:
      context: .
      dockerfile: Dockerfile
    container_name: sna-main
    depends_on:
      - redis
    ports:
      - "3000:3000"
    volumes:
      - .:/app
      - gem_cache:/usr/local/bundle/gems
      - node_modules:/app/node_modules
    environment:
      RAILS_ENV: development

  redis:
    image: redis:5.0.7

  sidekiq:
    build:
      context: .
      dockerfile: Dockerfile
    depends_on:
      - app
      - redis
    volumes:
      - .:/app
      - gem_cache:/usr/local/bundle/gems
      - node_modules:/app/node_modules
    environment:
      RAILS_ENV: development
    entrypoint: ./entrypoints/sidekiq-entrypoint.sh

volumes:
  gem_cache:
  node_modules:

It would be great if someone can help me out to understand how to run bundle install every time there is a change in Gemfile.

From the doc I have understood that because we are caching the Gems so we need to remove the volume explicitly if we add/remove a new gem.

I did remove the volumes by running docker-compose down -v.
It removed the volumes but still getting the same error.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I got it work by adding bundle install in my entrypoint file

    ----------------./entrypoints/docker-entrypoint.sh-----------------

    #!/bin/sh

set -e

if [ -f tmp/pids/server.pid ]; then
  rm tmp/pids/server.pid
fi

bundle install
bundle exec rails s -b 0.0.0.0

    ----------------./entrypoints/sidekiq-entrypoint.sh-----------------

    #!/bin/sh

set -e

if [ -f tmp/pids/server.pid ]; then
  rm tmp/pids/server.pid
fi

bundle install && bundle exec sidekiq -C config/sidekiq.yml

  2. 0

    There’s a chance that this is because docker-compose cached your images; you need to re-build with docker-compose up --build to reflect the image changes in docker-compose.

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