Error when add an additional volume for the web app container

Question

Error when add an additional volume for the Ruby on Rails web app container

Hello, I'm programmming a containerized Rails app. Right now I'm doing the setup for the production environment.

My docker-compose.production.yml:

version: '3'

services:
  db:
    image: postgres
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
    environment:
      POSTGRES_PASSWORD: password

  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec puma -C config/puma.rb"
    volumes:
      - .:/rails-lyrics-site
      - /rails-lyrics-site/node_modules
      - bundle:/usr/local/bundle
      - public-data:/rails-lyrics-site/public
      - log-data:/rails-lyrics-site/log
      - tmp-data:/rails-lyrics-site/tmp
    ports:
      - "3000:3000"
    depends_on:
      - db

  nginx:
    build:
      context: containers/nginx
    volumes:
      - public-data:/rails-lyrics-site/public
      - tmp-data:/rails-lyrics-site/tmp
    ports:
      - "80:80"
    depends_on:
      - web

volumes:
  bundle:
  public-data:
  log-data:
  tmp-data:

The problem is when I start with docker-compose -f docker-compose.production.yml up, I got the error:

Error

The problems will not occur when I remove the tmp-data volume from the web container. It seems that with this config, my tmp folder in the Rails source code is not being written into

Can anyone help me, please?

Answer 1

OK, my problems were I didn't public the volume in Dockerfile

# Dockerfile
FROM ruby:3.1.2

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

RUN curl -sL https://deb.nodesource.com/setup_16.x | bash -

RUN apt-get update -qq && apt-get install -y nodejs build-essential postgresql-client yarn \
    curl dirmngr apt-transport-https lsb-release ca-certificates

WORKDIR /app
COPY Gemfile /app/Gemfile
COPY Gemfile.lock /app/Gemfile.lock
RUN bundle install

COPY . /app
RUN mkdir -p tmp/sockets

COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]

VOLUME /app/public
VOLUME /app/tmp

CMD bash -c "rm -f tmp/pids/server.pid && bundle exec puma -C config/puma/production.rb"
EXPOSE 3000

After adding

VOLUME /app/public
VOLUME /app/tmp

The above docker compose worked