【Docker】起動してもすぐ落ちるときの解決法

環境

Docker version 20.10.7
docker-compose version 1.29.2

状況

Dockerを起動してもすぐに落ちる

% docker-compose up -d
Creating XXXXX_db_1     ... done
Creating XXXXX_redis_1 ... done
Creating XXXXX_worker_1 ... done
Creating XXXXX_app_1    ... done
Creating XXXXX_webpacker_1 ... done
Creating XXXXX_web_1       ... done

% docker ps -a        
CONTAINER ID   IMAGE                COMMAND                  CREATED         STATUS                      PORTS                                                  NAMES
XXXXXXXXXXXX   XXXXX_web           "/docker-entrypoint.…"   4 seconds ago   Up 2 seconds                80/tcp, 0.0.0.0:443->443/tcp, :::443->443/tcp          XXXXX_web_1
XXXXXXXXXXXX   XXXXX_webpacker     "/bin/bash -c 'rm -r…"   4 seconds ago   Exited (7) 2 seconds ago                                                           XXXXX_webpacker_1
XXXXXXXXXXXX   XXXXX_app           "/bin/bash -c 'rm tm…"   5 seconds ago   Exited (7) 2 seconds ago                                                           XXXXX_app_1
XXXXXXXXXXXX   XXXXX_worker        "/bin/bash -c 'bundl…"   5 seconds ago   Exited (7) 2 seconds ago                                                           XXXXX_worker_1

解決法

Docker Desktopでログを確認すると下記のエラー

Could not find　　XXXXX in any of the sources
Run `bundle install` to install missing gems.

指示どおりbundle install実行

次のコマンドでbundle installしようとするので、Gemfileを更新したらbuildし直す

% docker-compose build

次のエラー出現

The git source https://github.com/XXX/XXXXXXXXXXXXX.git is not yet checked out. Please run `bundle install` before trying to start your application

Gemfile修正

gem 'XXXXXXXXXXXXX', github: 'XXX/XXXXXXXXXXXXX'
↓
gem 'XXXXXXXXXXXXX', git: "https://github.com/XXX/XXXXXXXXXXXXX"

ここでDockerfile内でbundle installしないと意味ないことに気づく…

% docker-compose run app bundle install

もう一度buildしてupしてみる

% docker-compose build
% docker-compose up -d

成功！！

参考