Herokuを使用したDocker + Rails + MySQLアプリのデプロイ

# cd path/to/project;
# herokuにログインする
heroku login
# Herokuへコンテナを登録するためにコンテナレジストリにログイン
heroku container:login

# heroku config でも表示される
heroku config:get JAWSDB_URL
#=> JAWSDB_URL: mysql://username:password@hostname:port/default_schema
#=> JAWSDB_URL: mysql://<ユーザー名>:<パスワード>@<ホスト名>:<ポート番号>/<データベース名>

# 省略
# config.assets.compile = false
config.assets.compile = true

# config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
config.public_file_server.enabled = true

build:
  docker:
    web: Dockerfile.production
release:
  command:
    - mv confing/environments/production.heroku.rb confing/environments/production.rb
    - mv config/database.heroku.yml config/database.yml
    - mv config/puma.heroku.rb config/puma.rb
    - bundle exec rake db:create RAILS_ENV=production
    - bundle exec rake db:migrate RAILS_ENV=production
    - bundle exec bin/webpack
run:
  web: bundle exec puma -C config/puma.rb

workers Integer(ENV['WEB_CONCURRENCY'] || 2)
threads_count = Integer(ENV['RAILS_MAX_THREADS'] || 5)
threads threads_count, threads_count

preload_app!

rackup      DefaultRackup if defined?(DefaultRackup)
port        ENV['PORT']     || 3000
environment ENV['RACK_ENV'] || 'development'

on_worker_boot do
  # Worker specific setup for Rails 4.1+
  # See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
  ActiveRecord::Base.establish_connection
end

# 省略
production:
  <<: *default
  database: <%= ENV['HEROKU_DB_DATABASE_NAME'] %>
  # 変更
  encoding: utf8
  host: <%= ENV['HEROKU_DB_HOST'] %>
  username: <%= ENV['HEROKU_DB_USERNAME'] %>
  password: <%= ENV['HEROKU_DB_PASSWORD'] %>
  # 追記
  url: <%= ENV['JAWSDB_URL'] %>

git push heroku main
#=> Enumerating objects: 8, done.
#=> Counting objects: 100% (8/8), done.
#=> Delta compression using up to 4 threads
#=> Compressing objects: 100% (5/5), done.
#=> Writing objects: 100% (5/5), 669 bytes | 669.00 KiB/s, done.
#=> Total 5 (delta 4), reused 0 (delta 0), pack-reused 0
#=> remote: Pushed to branch other than [main, master], skipping build.
#=> To https://git.heroku.com/my_web_app.git
#=>    48a3947..43228ac  main -> main

heroku container:push web
heroku container:release web
heroku open

2023-02-02T08:03:35.104134+00:00 heroku[web.1]: State changed from crashed to starting
2023-02-02T08:04:02.748572+00:00 heroku[web.1]: Starting process with command `rails server -b 0.0.0.0 -p 3000`
2023-02-02T08:04:12.005785+00:00 app[web.1]: => Booting Puma
2023-02-02T08:04:12.005817+00:00 app[web.1]: => Rails 6.1.7.2 application starting in production
2023-02-02T08:04:12.005817+00:00 app[web.1]: => Run `bin/rails server --help` for more startup options
2023-02-02T08:04:16.313753+00:00 app[web.1]: Puma starting in single mode...
2023-02-02T08:04:16.313852+00:00 app[web.1]: * Puma version: 6.0.2 (ruby 2.7.7-p221) ("Sunflower")
2023-02-02T08:04:16.313888+00:00 app[web.1]: *  Min threads: 5
2023-02-02T08:04:16.313911+00:00 app[web.1]: *  Max threads: 5
2023-02-02T08:04:16.313957+00:00 app[web.1]: *  Environment: production
2023-02-02T08:04:16.313986+00:00 app[web.1]: *          PID: 3
2023-02-02T08:04:16.314956+00:00 app[web.1]: * Listening on http://0.0.0.0:3000
2023-02-02T08:04:16.321780+00:00 app[web.1]: Use Ctrl-C to stop
2023-02-02T08:05:03.024669+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2023-02-02T08:05:03.052600+00:00 heroku[web.1]: Stopping process with SIGKILL
2023-02-02T08:05:03.224138+00:00 heroku[web.1]: Process exited with status 137
2023-02-02T08:05:03.272466+00:00 heroku[web.1]: State changed from starting to crashed

git push heroku heroku-main

docker compose down

heroku container:push web

heroku container:release web

heroku rake db:migrate RAILS_ENV=production;
heroku rake db:seed_fu RAILS_ENV=production;
heroku run bin/webpack;

heroku open