gem 'aws-sdk-cloudwatch'

# config/initializers/cloudwatch_puma_metrics.rb
require 'aws-sdk-cloudwatch'
require 'net/http'
require 'json'

CLOUDWATCH = Aws::CloudWatch::Client.new(region: 'ap-northeast-1')


Thread.new do
  loop do
    begin
      sleep 10
      Rails.logger.info("Sending Puma metrics to CloudWatch")
      uri = URI('http://127.0.0.1:9293/stats')
      res = Net::HTTP.start(uri.host, uri.port, open_timeout: 1, read_timeout: 1) do |http|
        http.get(uri.request_uri)
      end

      stats = JSON.parse(res.body)
      Rails.logger.info(stats.inspect)
      capacity = stats['pool_capacity']

      CLOUDWATCH.put_metric_data(
        namespace: 'Custom/Puma',
        metric_data: [
          {
            metric_name: 'ThreadPoolCapacity',
            value: capacity,
            unit: 'Count',
            storage_resolution: 1,
            dimensions: [
              { name: 'Cluster', value: ENV['ECS_CLUSTER'] || 'default' },
              { name: 'Service', value: ENV['ECS_SERVICE_NAME'] || 'rails' }
            ]
          }
        ]
      )
     
    rescue => e
      Rails.logger.error("CloudWatch Puma metric error: #{e.class}: #{e.message}")
    end
  end
end

class RequestCounter
  def initialize(app)
    @app = app
  end

  def call(env)
    REQUEST_COUNTER.increment
    @app.call(env)
  end
end

activate_control_app 'tcp://127.0.0.1:9293', { no_token: true }

aws configure

aws ecr get-login-password --region ap-northeast-1 | docker login --username AWS --password-stdin {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com

aws ecr create-repository \
        --repository-name rails \
        --image-scanning-configuration scanOnPush=true \
        --region ap-northeast-1

docker tag rails-demo:latest {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

docker push {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

sudo gem install rails

rails new my-app
cd my-app

rails -v
Rails 8.1.1

「ENV RAILS_ENV="production"」をコメントアウトして、「ENV RAILS_ENV=development」を追記します。
#ENV RAILS_ENV="production" \
ENV RAILS_ENV=development\

以下のようにENTRYPOINTをコメントアウト
#ENTRYPOINT ["/rails/bin/docker-entrypoint"]

以下のようにEXPOSEとCMDを変更
#EXPOSE 80
#CMD ["./bin/thrust", "./bin/rails", "server"]

EXPOSE 3000
CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]

docker build -t rails-demo .

docker run -d -p 3000:3000 \
  -e RAILS_MASTER_KEY=$(cat config/master.key) \
  --name my-app \
  rails-demo

aws configure

aws ecr get-login-password --region ap-northeast-1 | docker login --username AWS --password-stdin {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com

aws ecr create-repository \
        --repository-name rails \
        --image-scanning-configuration scanOnPush=true \
        --region ap-northeast-1

docker tag rails-demo:latest {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

docker push {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

aws ecs describe-tasks \
  --cluster <クラスター名> \
  --tasks <タスクID> \
  --query "tasks[0].{CreatedAt:createdAt, PullStarted:pullStartedAt, PullStopped:pullStoppedAt, StartedAt:startedAt}"

{
    "CreatedAt": "2025-12-28T10:39:06.054000+09:00",
    "PullStarted": "2025-12-28T10:39:17.362000+09:00",
    "PullStopped": "2025-12-28T10:39:27.310000+09:00",
    "StartedAt": "2025-12-28T10:39:28.900000+09:00"
}

{
    "CreatedAt": "2025-12-28T10:35:07.750000+09:00",
    "PullStarted": "2025-12-28T10:35:22.546000+09:00",
    "PullStopped": "2025-12-28T10:35:34.311000+09:00",
    "StartedAt": "2025-12-28T10:35:37.096000+09:00"
}

docker build -t rails-demo .

docker run -d -p 3000:3000 \
  -e RAILS_MASTER_KEY=$(cat config/master.key) \
  --name my-app \
  rails-demo

＜コンテナID確認＞
docker ps -a
＜コンテナにbashではいる＞
docker exec -it {コンテナID} /bin/bash

bundle exec rails c
helper.asset_url("100KB.png")

brew install jmeter

jmeter

Thread Group
  Number of Threads:50
  Ramp-up:60
  Duration:300

以下の設定で3000アクセスに設定します。1分で3000アクセスなので、秒間50アクセスです。

Constant Throughput Timer
 Target throughput:3000

以下の設定で画像にアクセスするようにします。

HTTP Request
  protocol:https
  Server Name or ip:ECSのドメイン
  Path:{helper.asset_url("100KB.png")の結果}

確認結果

秒間50アクセスを5分間継続したところ、CPU使用率は14%程度になりました。

サーバはECS Fargateで、1vCPU/2GBです。

sudo gem install rails

rails new my-app
cd my-app

rails -v
Rails 8.1.1

# syntax=docker/dockerfile:1
# check=error=true

# This Dockerfile is designed for production, not development. Use with Kamal or build'n'run by hand:
# docker build -t my_app .
# docker run -d -p 80:80 -e RAILS_MASTER_KEY= --name my_app my_app

# For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html

# Make sure RUBY_VERSION matches the Ruby version in .ruby-version
ARG RUBY_VERSION=3.4.2
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

# Rails app lives here
WORKDIR /rails

# Install base packages
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y curl libjemalloc2 libvips sqlite3 && \
    ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Set production environment variables and enable jemalloc for reduced memory usage and latency.
ENV RAILS_ENV="production" \
    BUNDLE_DEPLOYMENT="1" \
    BUNDLE_PATH="/usr/local/bundle" \
    BUNDLE_WITHOUT="development" \
    LD_PRELOAD="/usr/local/lib/libjemalloc.so"

# Throw-away build stage to reduce size of final image
FROM base AS build

# Install packages needed to build gems
RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential git libyaml-dev pkg-config && \
    rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Install application gems
COPY Gemfile Gemfile.lock vendor ./

RUN bundle install && \
    rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
    # -j 1 disable parallel compilation to avoid a QEMU bug: https://github.com/rails/bootsnap/issues/495
    bundle exec bootsnap precompile -j 1 --gemfile

# Copy application code
COPY . .

# Precompile bootsnap code for faster boot times.
# -j 1 disable parallel compilation to avoid a QEMU bug: https://github.com/rails/bootsnap/issues/495
RUN bundle exec bootsnap precompile -j 1 app/ lib/

# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile




# Final stage for app image
FROM base

# Run and own only the runtime files as a non-root user for security
RUN groupadd --system --gid 1000 rails && \
    useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash
USER 1000:1000

# Copy built artifacts: gems, application
COPY --chown=rails:rails --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --chown=rails:rails --from=build /rails /rails

# Entrypoint prepares the database.
ENTRYPOINT ["/rails/bin/docker-entrypoint"]

# Start server via Thruster by default, this can be overwritten at runtime
EXPOSE 80
CMD ["./bin/thrust", "./bin/rails", "server"]

「ENV RAILS_ENV="production"」をコメントアウトして、「ENV RAILS_ENV=development」を追記します。
#ENV RAILS_ENV="production" \
ENV RAILS_ENV=development\

以下のようにENTRYPOINTをコメントアウト
#ENTRYPOINT ["/rails/bin/docker-entrypoint"]

以下のようにEXPOSEとCMDを変更
#EXPOSE 80
#CMD ["./bin/thrust", "./bin/rails", "server"]

EXPOSE 3000
CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]

docker build -t rails-demo .

docker run -d -p 3000:3000 \
  -e RAILS_MASTER_KEY=$(cat config/master.key) \
  --name my-app \
  rails-demo

aws configure

aws ecr get-login-password --region ap-northeast-1 | docker login --username AWS --password-stdin {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com

aws ecr create-repository \
        --repository-name rails \
        --image-scanning-configuration scanOnPush=true \
        --region ap-northeast-1

docker tag rails-demo:latest {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

docker push {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

services:
  web:
    build: .
    image: vueweb
    volumes:
      - .:/app
    container_name: 'web'
    ports:
      - '8080:8080'
    tty: true

FROM node:22
RUN npm install -g @vue/cli
EXPOSE 8080

docker-compose up --build

docker-compose exec web bash

vue create sample

cd sample && npm run serve

http://localhost:8080/

services:
  web:
    build: .
    image: vueweb
    volumes:
      - .:/app
    command: sh -c "cd sample && npm run serve"
    container_name: 'web'
    ports:
      - '8080:8080'
    tty: true

version: '3'

services:
    php:
        build:
            # Dockerfileを格納するフォルダのパス
            context: .
            # Dockerfileのファイル名
            dockerfile: Dockerfile
        volumes:
            - .:/var/www/html
        ports:
            - 8000:80
        container_name: php8.3
    mysql:
        image: mysql:8.0
        volumes:
            - /var/lib/mysql
        environment:
            - MYSQL_ROOT_PASSWORD=root
            - MYSQL_DATABASE=test
            - MYSQL_USER=test
            - MYSQL_PASSWORD=test
        container_name: mysql8.0

FROM php:8.3-apache
# htaccess有効化
RUN  a2enmod rewrite
#composer install
COPY --from=composer /usr/bin/composer /usr/bin/composer

RewriteEngine on
RewriteBase /
RewriteRule ^$ {ドキュメンルートへのパス} [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ {ドキュメンルートへのパス}$1 [L]

docker compose up

http://localhost:8000/

docker compose exec php bash

use Monolog\Formatter\JsonFormatter;   // これを追加
:
:
:



    'channels' => [
        // 以下を追加
        'stdout' => [
            'driver' => 'monolog',
            'level' => env('LOG_LEVEL', 'debug'),
            'handler' => StreamHandler::class,
            'with' => [
                'stream' => 'php://stdout',
            ],
            'formatter' => JsonFormatter::class,
        ],

#LOG_CHANNEL=stack  // コメントアウト
LOG_CHANNEL=stdout  // 追加

use Illuminate\Support\Facades\Route;
use Illuminate\Support\Facades\Log;   // 追加

Route::get('/', function () {
    Log::debug('json_log_test');   // 追加
    return view('welcome');
});

{"message":"json_log_test","context":{},"level":100,"level_name":"DEBUG","channel":"local","datetime":"2024-06-02T00:27:24.540572+00:00","extra":{}}

rails new test_app

cd test_app/

vi Dockerfile

<変更①>「ENV RAILS_ENV="production"」をコメントアウトして、「ENV RAILS_ENV=$ENVIROMENTS」を追記します。
#ENV RAILS_ENV="production" \
ENV RAILS_ENV=$ENVIROMENTS \
<変更②>
5行目のFORMの後に以下を追加
ARG ENVIROMENTS

docker build . -t test_app --build-arg ENVIROMENTS='development'

docker run -it -p 3000:3000 --env RAILS_MASTER_KEY=`cat config/master.key` test_app bin/rails server -b 0.0.0.0

aws configure

aws ecr get-login-password --region ap-northeast-1 | docker login --username AWS --password-stdin {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com

aws ecr create-repository \
        --repository-name rails \
        --image-scanning-configuration scanOnPush=true \
        --region ap-northeast-1 

docker tag test_app:latest {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

docker push {AWSアカウントID}.dkr.ecr.ap-northeast-1.amazonaws.com/rails:latest

brew install rbenv

rbenv install -l

rbenv install 3.3.1
rbenv global 3.3.1

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"
source ~/.zprofile

sudo gem install rails

rails --version

Rails 7.1.3.3

rails new test_app

cd test_app/

bin/rails server

vi Dockerfile

<変更①>「ENV RAILS_ENV="production"」をコメントアウトして、「ENV RAILS_ENV=$ENVIROMENTS」を追記します。
#ENV RAILS_ENV="production" \
ENV RAILS_ENV=$ENVIROMENTS \
<変更②>
5行目のFORMの後に以下を追加
ARG ENVIROMENTS

docker build . -t test_app --build-arg ENVIROMENTS='development'

docker run -it -p 3000:3000 --env RAILS_MASTER_KEY=`cat config/master.key` test_app bin/rails server -b 0.0.0.0

rails new . --force --database=mysql

vi Dockerfile

<変更①>「ENV RAILS_ENV="production"」をコメントアウトして、「ENV RAILS_ENV=$ENVIROMENTS」を追記します。
#ENV RAILS_ENV="production" \
ENV RAILS_ENV=$ENVIROMENTS \
<変更②>
5行目のFORMの後に以下を追加
ARG ENVIROMENTS

vi docker-compose.yml

version: "3"
services:
  app:
    container_name: app_rails
    build:
      args:
        ENVIROMENTS: development
        RAILS_MASTER_KEY: 'cat config/master.key'
    command: bin/rails server -b 0.0.0.0
    volumes:
      - .:/rails
    ports:
      - 80:3000
    tty: true
    stdin_open: true
    depends_on:
      - db
  db:
    image: mysql:8.0.28
    container_name: db
    environment: 
      MYSQL_ROOT_PASSWORD: password
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    volumes:  
      - ./docker/db/data:/var/lib/mysql
    ports:
      - 3306:3306
  phpmyadmin:
    container_name: test_phpmyadmin
    image: phpmyadmin
    environment:
    - PMA_USER=root
    - PMA_PASSWORD=password
    ports:
    - 8080:80
    depends_on:
      - db

vi config/database.yml

default: &default
  adapter: mysql2
  encoding: utf8mb4
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: root
  password: password
  host: db

development:
  <<: *default
  database: test4_development

docker compose up

docker-compose run app bin/rails db:create

docker compose exec app bash

cat /etc/os-release

PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

├── docker
│   ├── db  # MySQL(DB)コンテナの設定ファイル等を入れるディレクトリ
│   │   └── my.cnf
│   ├── nginx  # nginxコンテナの設定ファイル等を入れるディレクトリ
│   │   └── default.conf
│   └── php  # アプリ(PHP)コンテナの設定ファイル等を入れるディレクトリ
│       └── Dockerfile
└── docker-compose.yml

mkdir test_laravel
cd test_laravel/

vi docker-compose.yml

version: '3'
services:
  app:
    container_name: app_laravel  
    build: ./docker/php
    volumes:
      - .:/var/www
  nginx:
    image: nginx 
    container_name: nginx
    ports:
      - 8000:80 
    volumes:
      - .:/var/www
      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf
    working_dir: /var/www
    depends_on:
      - app
  db:
    image: mysql:8.0.36
    container_name: db
    environment: 
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: database 
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    volumes:  
      - ./docker/db/data:/var/lib/mysql
      - ./docker/db/my.cnf:/etc/mysql/conf.d/my.cnf 
      - ./docker/db/sql:/docker-entrypoint-initdb.d
    ports:
      - 3306:3306
  # phpMyAdmin
  phpmyadmin:
    container_name: test_phpmyadmin
    image: phpmyadmin
    environment:
    - PMA_USER=root
    - PMA_PASSWORD=password
    ports:
    - 8080:80

mkdir docker

mkdir docker/db

vi docker/db/my.conf

[mysqld]
character-set-server=utf8mb4
collation-server=utf8mb4_unicode_ci
default_authentication_plugin=mysql_native_password

[client]
default-character-set=utf8mb4

mkdir docker/nginx

vi docker/nginx/default.conf

server {
  listen 80;
  root /var/www/laravel-project/public;
  index index.php;
  location / {
    try_files $uri $uri/ /index.php?$query_string;
  }
  location ~ \.php$ {
    try_files $uri =404;
    fastcgi_split_path_info ^(.+\.php)(/.+)$;
    fastcgi_pass app:9000; 
    fastcgi_index index.php;
    include fastcgi_params;
    fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
    fastcgi_param PATH_INFO $fastcgi_path_info;
  }
}

mkdir docker/php

vi docker/php/Dockerfile

FROM php:8.3-fpm

RUN apt-get update \
  && apt-get install -y zlib1g-dev mariadb-client vim libzip-dev \
  && docker-php-ext-install zip pdo_mysql

#Composer install
RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
RUN php composer-setup.php
RUN php -r "unlink('composer-setup.php');"
RUN mv composer.phar /usr/local/bin/composer

ENV COMPOSER_ALLOW_SUPERUSER 1

ENV COMPOSER_HOME /composer

ENV PATH $PATH:/composer/vendor/bin


WORKDIR /var/www

RUN composer global require "laravel/installer"

docker compose up -d

# アプリコンテナに入るコマンド
docker compose exec app bash

# Laravel11インストールコマンド
composer create-project --prefer-dist laravel/laravel laravel-project "11.*"

vi laravel-project/.env

DB_CONNECTION=mysql
DB_HOST=db
DB_PORT=3306
DB_DATABASE=laravel
DB_USERNAME=root
DB_PASSWORD=password

cd laravel-project/
php artisan migrate

curl -s "https://laravel.build/example-app" | bash

cd プロジェクト名 && ./vendor/bin/sail up

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'laravel.sessions' doesn't exist