`BUNDLER_VERSION` not picked up with ruby 2.5.1-slim base image

[vrinek]

I've tried using dockerdev with the 2.5.1-slim-stretch base docker image and it kept using v1.16 for bundler.

After a little digging, I noticed that the base image explicitly defines the BUNDLER_VERSION as an environment variable: https://hub.docker.com/layers/ruby/library/ruby/2.5.1-slim/images/sha256-f05f349dcb24a2e4d556fc95476753348e4678503689422cd093de7067ea59c5?context=explore

ENV BUNDLER_VERSION=1.16.6

The same issue is not present in the 2.6.3-slim-buster base image.

I am not sure how to fix this elegantly. For now, I have renamed my ARG to not conflict with BUNDLER_VERSION but I cannot consider this optimal.

Any other ideas on how to mitigate this for ruby 2.5.1?

[oliverklee]

@vrinek Have you updated the image version in the Docker compose file? (This might be necessary for Docker to use the changed environment variables.)

[elalemanyo]

Hi,
I am using RUBY_VERSION: "2.6.5" and I can not install bundler 🤷‍♂️
This is the error that I get when I try to run bundler:

Traceback (most recent call last):
	2: from /usr/local/bin/bundler:23:in `<main>'
	1: from /usr/local/lib/ruby/site_ruby/2.6.0/rubygems.rb:300:in `activate_bin_path'
/usr/local/lib/ruby/site_ruby/2.6.0/rubygems.rb:281:in `find_spec_for_exe': Could not find 'bundler' (1.17.3) required by your /app/Gemfile.lock. (Gem::GemNotFoundException)
To update to the latest version installed on your system, run `bundle update --bundler`.
To install the missing version, run `gem install bundler:1.17.3`

I remove all bundler block and use just: RUN gem install bundler --no-document -v $BUNDLER_VERSION, and bundler was there but not the version that I told to install...

What I am doing wrong?

Thanks!

[palkan]

@elalemanyo The problem is with your Gemfile.lock; how did it get into the Docker image? It shouldn't be there at the time of building it.

[elalemanyo]

@palkan I am almost doing the same way, I did some changes 🙈 All the docker files (Dockerfile, docker-compose.yml) are inside a folder (.docker). I like to have all stuff there, because not all dev team are using docker and is for the moment just for dev. But besides that is almost the same, just a little bit easier.
Dockerfile:

ARG RUBY_VERSION
FROM ruby:$RUBY_VERSION-slim-buster

ARG PG_MAJOR
ARG NODE_MAJOR
ARG BUNDLER_VERSION
ARG YARN_VERSION

# Common dependencies
RUN apt-get update -qq \
  && DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
    build-essential \
    gnupg2 \
    curl \
    less \
    git \
    shared-mime-info \
  && apt-get clean \
  && rm -rf /var/cache/apt/archives/* \
  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
  && truncate -s 0 /var/log/*log

# Add PostgreSQL to sources list
RUN curl -sSL https://www.postgresql.org/media/keys/ACCC4CF8.asc | apt-key add - \
  && echo 'deb http://apt.postgresql.org/pub/repos/apt/ buster-pgdg main' $PG_MAJOR > /etc/apt/sources.list.d/pgdg.list

# Add NodeJS to sources list
RUN curl -sL https://deb.nodesource.com/setup_$NODE_MAJOR.x | bash -

# Add Yarn to the sources list
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add - \
  && echo 'deb http://dl.yarnpkg.com/debian/ stable main' > /etc/apt/sources.list.d/yarn.list

# Install dependencies
RUN apt-get update -qq && DEBIAN_FRONTEND=noninteractive apt-get -yq dist-upgrade && \
  DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
    libpq-dev \
    postgresql-client-$PG_MAJOR \
    nodejs \
    yarn=$YARN_VERSION-1 && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
    truncate -s 0 /var/log/*log

# Configure bundler
ENV LANG=C.UTF-8 \
  BUNDLE_JOBS=4 \
  BUNDLE_RETRY=3

# Upgrade RubyGems and install required Bundler version
# See https://github.com/evilmartians/terraforming-rails/pull/24 for discussion
RUN gem update --system && \
    rm /usr/local/lib/ruby/gems/*/specifications/default/bundler-*.gemspec && \
    gem uninstall bundler && \
    gem install bundler -v $BUNDLER_VERSION

# Create a directory for the app code
RUN mkdir -p /app

WORKDIR /app

and docker-compose.yml:

version: "3.9"

services:
  web:
    container_name: ${PROJECT_NAME}-web
    build:
      context: .
      dockerfile: Dockerfile
      args:
        RUBY_VERSION: "2.6.5"
        NODE_MAJOR: "12"
        YARN_VERSION: "1.13.0"
        BUNDLER_VERSION_CUSTOM: "1.17.3"
        PG_MAJOR: "13"
    command: bash -c "rm -f tmp/pids/server.pid && BIND=0.0.0.0 PORT=3000 bin/server"
    environment:
      POSTGRES_HOST: ${POSTGRES_HOST}
      POSTGRES_USER: ${POSTGRES_USER}
      DATABASE_URL: postgres://postgres:postgres@postgres:5432
      SOLR_HOST: "solr"
      SOLR_PORT: 8983
      WEBPACKER_DEV_SERVER_HOST: 0.0.0.0
      NODE_ENV: ${NODE_ENV:-development}
      RAILS_ENV: ${RAILS_ENV:-development}
      YARN_CACHE_FOLDER: /app/node_modules/.yarn-cache
    tmpfs:
      - /tmp
    volumes:
      - ../:/app:cached
      - ./data/bundle:/usr/local/bundle:delegated
      - rails_cache:/app/tmp/cache:delegated
      - node_modules:/app/node_modules:delegated
      - packs:/app/public/packs:delegated

    ports:
      - "3000:3000"
      - "3035:3035"
    depends_on:
      - postgres
      - solr
    stdin_open: true
    tty: true

  postgres:
    container_name: ${PROJECT_NAME}-postgres
    image: postgres:13
    environment:
      - POSTGRES_HOST_AUTH_METHOD=trust
    volumes:
      - ./data/postgres:/var/lib/postgresql/data:delegated
    ports:
      - "5432:5432"

  solr:
    container_name: ${PROJECT_NAME}-solr
    image: solr:6
    ports:
      - "8983:8983"
    volumes:
      - ../solr/configsets/sunspot:/opt/solr/server/solr/configsets/sunspot:delegated
      - ./data/solr:/opt/solr/server/solr/mycores:delegated
    entrypoint:
      - docker-entrypoint.sh
      - solr-precreate # execute solr-precreate script with the parameters below
      - development # core name
      - /opt/solr/server/solr/configsets/sunspot # custom configset
    depends_on:
      - postgres

volumes:
  node_modules:
  rails_cache:
  packs:

thanks for your help

[palkan]

Could not find 'bundler' (1.17.3) required by your /app/Gemfile.lock

As far as I understand, the image is build successfully, the exception is raised during bundle install, right?

Then, you should either specify the same version for the Docker image as in your Gemfile.lock or remove the BUNDLED_WITH from the Gemfile.lock and try to run bundle install again.

[elalemanyo]

@palkan the error is just when I try to check the bundle version 🤷‍♂️, the interesting thing ist that if I remove all bundler stuff from the Dockerfile and check the bundle version I get 1.17.2, maybe is the one that I am getting by default?

[palkan]

when I try to check the bundle version

Try to run bundle version outside of the project root. Bundler verifies the version in Gemfile.lock for any command.

[elalemanyo]

@palkan out of the project root I get this error:

root@0f5e3d748315:/# bundle -v
Traceback (most recent call last):
	2: from /usr/local/bin/bundle:23:in `<main>'
	1: from /usr/local/lib/ruby/site_ruby/2.6.0/rubygems.rb:300:in `activate_bin_path'
/usr/local/lib/ruby/site_ruby/2.6.0/rubygems.rb:281:in `find_spec_for_exe': can't find gem bundler (>= 0.a) with executable bundle (Gem::GemNotFoundException)

[elalemanyo]

@palkan now works. I was so stupid and BUNDLER_VERSION was set als string 🙈

After doing this change I can install the correct bundler version like this:

RUN gem update --system && \
    gem install bundler:$BUNDLER_VERSION

thanks for all the help