docker-compose upでコンテナが起動しない

Question

docker-compose.yml

version: '3'
services:
  db:
    image: postgres
    volumes:
      - ./tmp/db:/var/lib/postgresql/data
  web:
    build: .
    command: bash -c "rm -f tmp/pids/server.pid && bundle exec rails s -p 3000 -b '0.0.0.0'"
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - db

Dockerfile

FROM ruby:2.5
RUN apt-get update -qq && apt-get install -y nodejs postgresql-client
RUN mkdir /myapp
WORKDIR /myapp
COPY Gemfile /myapp/Gemfile
COPY Gemfile.lock /myapp/Gemfile.lock
RUN bundle install
COPY . /myapp

# Add a script to be executed every time the container starts.
COPY entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/entrypoint.sh
ENTRYPOINT ["entrypoint.sh"]
EXPOSE 3000

# Start the main process.
CMD ["rails", "server", "-b", "0.0.0.0"]

Railsでのweb開発をDockerのコンテナ上で行なっているのですが、docker-compose upを実行すると以下のように表示されて、すぐに落ちてしまいます。(問題が有るであろう部分のみ表示しています。)

terateil:app terateil$ docker-compose up
app_db_1 is up-to-date
Starting app_web_1 ... done
Attaching to app_db_1, app_web_1
db_1   | 2019-02-12 05:05:04.358 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
db_1   | 2019-02-12 05:05:04.358 UTC [1] LOG:  listening on IPv6 address "::", port 5432
db_1   | 2019-02-12 05:05:04.363 UTC [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
db_1   | 2019-02-12 05:05:04.524 UTC [24] LOG:  database system was interrupted; last known up at 2019-02-12 04:52:18 UTC
db_1   | 2019-02-12 05:05:11.983 UTC [24] LOG:  database system was not properly shut down; automatic recovery in progress
db_1   | 2019-02-12 05:05:12.121 UTC [24] LOG:  redo starts at 0/168B928
db_1   | 2019-02-12 05:05:12.122 UTC [24] LOG:  invalid record length at 0/168B960: wanted 24, got 0
db_1   | 2019-02-12 05:05:12.122 UTC [24] LOG:  redo done at 0/168B928
db_1   | 2019-02-12 05:05:12.459 UTC [1] LOG:  database system is ready to accept connections
web_1  | /usr/local/bundle/gems/actionpack-5.2.2/lib/action_dispatch/routing/mapper.rb:314:in `block (2 levels) in check_controller_and_action': '' is not a supported controller name. This can lead to potential routing problems. See http://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use (ArgumentError)
web_1  | 	from /usr/local/bundle/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
web_1  | 	from /usr/local/bundle/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
web_1  | 	from /myapp/bin/spring:15:in `require'
web_1  | 	from /myapp/bin/spring:15:in `<top (required)>'
web_1  | 	from bin/rails:3:in `load'
web_1  | 	from bin/rails:3:in `<main>'
web_1  | => Booting Puma
web_1  | => Rails 5.2.2 application starting in development 
web_1  | => Run `rails server -h` for more startup options
web_1  | Exiting
app_web_1 exited with code 1

捕捉：tmp/pids/server.pidファイルは生成されていません。
どなたか解決方法がわかる方ご教授頂けたら幸いです。

Answer 1

以下のエラーを読んでください。docker-composeの問題ではなくてRailsの設定がおかしいようです。

'' is not a supported controller name. This can lead to potential routing problems. See http://guides.rubyonrails.org/routing.html#specifying-a-controller-to-use (ArgumentError)

丁寧にURLまで示してくれているので読んで自己解決してみてください。

Comments

[akioyonamine]

解答ありがとうございます。
自己解決いたしました。
routes.rbでコントローラー名を書いておらずアクション名しか書いていないgetリクエストがありました。
こんな初歩的なミスに解答してくれて誠にありがとうございます。