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Rails5.2(APIサーバーとして) + MySQL5.7 + Docker3メモ

Last updated at Posted at 2018-08-02

下記記事をベースにもろもろのバージョンをあげる

https://qiita.com/togana/items/30b22fc39fe6f7a188ec
https://qiita.com/jshimazu/items/ba13ce87dfdb11e2d1d9

Railsアプリ作成する

$ mkdir app_name
$ cd app_name

Rubyを指定したバージョンで取得する

$ docker pull ruby:2.5.1

Gemfile作成する

$ docker run --rm -v "$PWD":/usr/src/app_name -w /usr/src/app_name ruby:2.5.1 bundle init
$ vim Gemfile 
source "https://rubygems.org"
gem 'rails', '5.2.0'

Gemfile.lockを作成する

touch Gemfile.lock

Dockerfileを作成する

$ vim Dockerfile
FROM ruby:2.5.1

ENV APP_ROOT /usr/src/app_name

WORKDIR $APP_ROOT

RUN apt-get update && \
    apt-get install -y nodejs \
                       mysql-client \
                       postgresql-client \
                       sqlite3 \
                       --no-install-recommends && \
    rm -rf /var/lib/apt/lists/*

COPY Gemfile $APP_ROOT
COPY Gemfile.lock $APP_ROOT

RUN \
  echo 'gem: --no-document' >> ~/.gemrc && \
  cp ~/.gemrc /etc/gemrc && \
  chmod uog+r /etc/gemrc && \
  bundle config --global build.nokogiri --use-system-libraries && \
  bundle config --global jobs 4 && \
  bundle install && \
  rm -rf ~/.gem

ビルドしてイメージを作成する

$ docker build -t developer_name/app_name .

イメージができているか確認する

docker images
REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
developer_name/app_name   latest              861aa800bf5c        About an hour ago   1.09GB
ruby                           2.5.1               1d8640b852eb        11 days ago         869MB

apiモードでrails newする

$ docker run --rm -it -v "$PWD":/usr/src/app_name developer_name/app_name rails new --api . -BT
       exist  
   identical  README.rdoc
   identical  Rakefile
   identical  config.ru
   identical  .gitignore
    conflict  Gemfile
Overwrite /usr/src/app_name/Gemfile? (enter "h" for help) [Ynaqdh] Y

Dockerfileを修正する

$ vim Dockerfile
FROM ruby:2.5.1

ENV APP_ROOT /usr/src/app_name

WORKDIR $APP_ROOT

RUN apt-get update && \
    apt-get install -y nodejs \
                       mysql-client \
                       postgresql-client \
                       sqlite3 \
                       --no-install-recommends && \
    rm -rf /var/lib/apt/lists/*

COPY Gemfile $APP_ROOT
COPY Gemfile.lock $APP_ROOT

RUN \
  echo 'gem: --no-document' >> ~/.gemrc && \
  cp ~/.gemrc /etc/gemrc && \
  chmod uog+r /etc/gemrc && \
  bundle config --global build.nokogiri --use-system-libraries && \
  bundle config --global jobs 4 && \
  bundle install && \
  rm -rf ~/.gem

# 下記を追記
COPY . $APP_ROOT

EXPOSE  3000
CMD ["rails", "server", "-b", "0.0.0.0"]

ビルドしてイメージを再作成する

$ docker build -t developer_name/app_name .

起動するか確認する

$ docker run -d -p 3000:3000 developer_name/app_name

Dockerfileをdocker-compose(バージョン3)で管理する

$ vim docker-compose.yml
version: '3'
services:
  app:
    build: .
    command: bin/rails s -b "0.0.0.0"
    ports:
      - "3000:3000"
    volumes:
      - ".:/app_name"
    depends_on:
      - db
    environment:
      - DATABASE_URL=mysql2://root:password@db/db_name

  db:
    image: mysql:5.7.10
    environment:
     MYSQL_DATABASE: db_name
     MYSQL_ROOT_PASSWORD: password
    ports:
      - "3306:3306"
    volumes:
      - mysql-data:/var/lib/mysql
volumes:
  mysql-data:

再ビルドする

$ docker-compose build
$ docker-compose up -d

必要であればdockerを再起動する

$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
05a6270674cc        developer_name/app_name   "rails server -b 0.0."   6 seconds ago       Up 5 seconds        0.0.0.0:3000->3000/tcp   goofy_lumiere
$ docker stop 05a6270674cc
05a6270674cc
$ docker-compose up -d

DBをsqliteからmysql2に変更するためGemfileを修正する

$ vim Gemfile
# gem 'sqlite3'
gem 'mysql2'

config/database.ymlもmysql2に対応させる

default: &default
  adapter: mysql2
  encoding: utf8
  port: 3306
  pool: 5
  timeout: 5000
  url: <%= ENV['DATABASE_URL'] %>
development:
  <<: *default
  database: db_development

test:
  <<: *default
  database: db_test

production:
  <<: *default
  database: db_production

再ビルドする

$ docker-compose build
$ docker-compose up -d

ダミーのDBを作成する

$ docker-compose run --rm app rake db:create

最後にlocalhostで動作をきちんと立ち上がっているか確認する

以上

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