Amazon Elastic Beanstalk(Server環境)をPythonで構築してみた

下記と同じようにElastic Beanstalkでサンプルアプリケーションを使ってWebサーバ環境を構築していきます。サンプルアプリケーションと実行環境をPythonに変えただけですが。。(∩´∀｀)∩
amegaeru.hatenablog.jp

やること

Elastic BeanstalkのServer環境をPythonで構築する

実践！

１．サンプルアプリケーションをダウンロード
　１－１．下記サイトからpython.zipをダウンロード
　　https://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/tutorials.html
　　中身のapplication.pyはこんな感じ

cat application.py

import logging.handlers

# Create logger
logger = logging.getLogger(__name__)
logger.setLevel(logging.INFO)

# Handler 
LOG_FILE = '/tmp/sample-app.log'
handler = logging.handlers.RotatingFileHandler(LOG_FILE, maxBytes=1048576, backupCount=5)
handler.setLevel(logging.INFO)

# Formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# Add Formatter to Handler
handler.setFormatter(formatter)

# add Handler to Logger
logger.addHandler(handler)

welcome = """
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <!--
    Copyright 2012 Amazon.com, Inc. or its affiliates. All Rights Reserved.

    Licensed under the Apache License, Version 2.0 (the "License"). You may not use this file except in compliance with the License. A copy of the License is located at

        http://aws.Amazon/apache2.0/

    or in the "license" file accompanying this file. This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
  -->
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>Welcome</title>
  <style>
  body {
    color: #ffffff;
    background-color: #E0E0E0;
    font-family: Arial, sans-serif;
    font-size:14px;
    -moz-transition-property: text-shadow;
    -moz-transition-duration: 4s;
    -webkit-transition-property: text-shadow;
    -webkit-transition-duration: 4s;
    text-shadow: none;
  }
  body.blurry {
    -moz-transition-property: text-shadow;
    -moz-transition-duration: 4s;
    -webkit-transition-property: text-shadow;
    -webkit-transition-duration: 4s;
    text-shadow: #fff 0px 0px 25px;
  }
  a {
    color: #0188cc;
  }
  .textColumn, .linksColumn {
    padding: 2em;
  }
  .textColumn {
    position: absolute;
    top: 0px;
    right: 50%;
    bottom: 0px;
    left: 0px;

    text-align: right;
    padding-top: 11em;
    background-color: #1BA86D;
    background-image: -moz-radial-gradient(left top, circle, #6AF9BD 0%, #00B386 60%);
    background-image: -webkit-gradient(radial, 0 0, 1, 0 0, 500, from(#6AF9BD), to(#00B386));
  }
  .textColumn p {
    width: 75%;
    float:right;
  }
  .linksColumn {
    position: absolute;
    top:0px;
    right: 0px;
    bottom: 0px;
    left: 50%;

    background-color: #E0E0E0;
  }

  h1 {
    font-size: 500%;
    font-weight: normal;
    margin-bottom: 0em;
  }
  h2 {
    font-size: 200%;
    font-weight: normal;
    margin-bottom: 0em;
  }
  ul {
    padding-left: 1em;
    margin: 0px;
  }
  li {
    margin: 1em 0em;
  }
  </style>
</head>
<body id="sample">
  <div class="textColumn">
    <h1>Congratulations</h1>
    <p>Your first AWS Elastic Beanstalk Python Application is now running on your own dedicated environment in the AWS Cloud</p>
    <p>This environment is launched with Elastic Beanstalk Python Platform</p>
  </div>
  
  <div class="linksColumn"> 
    <h2>What's Next?</h2>
    <ul>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/">AWS Elastic Beanstalk overview</a></li>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/index.html?concepts.html">AWS Elastic Beanstalk concepts</a></li>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/create_deploy_Python_django.html">Deploy a Django Application to AWS Elastic Beanstalk</a></li>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/create_deploy_Python_flask.html">Deploy a Flask Application to AWS Elastic Beanstalk</a></li>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/create_deploy_Python_custom_container.html">Customizing and Configuring a Python Container</a></li>
    <li><a href="http://docs.amazonwebservices.com/elasticbeanstalk/latest/dg/using-features.loggingS3.title.html">Working with Logs</a></li>

    </ul>
  </div>
</body>
</html>
"""

def application(environ, start_response):
    path = environ['PATH_INFO']
    method = environ['REQUEST_METHOD']
    if method == 'POST':
        try:
            if path == '/':
                request_body_size = int(environ['CONTENT_LENGTH'])
                request_body = environ['wsgi.input'].read(request_body_size)
                logger.info("Received message: %s" % request_body)
            elif path == '/scheduled':
                logger.info("Received task %s scheduled at %s", environ['HTTP_X_AWS_SQSD_TASKNAME'],
                            environ['HTTP_X_AWS_SQSD_SCHEDULED_AT'])
        except (TypeError, ValueError):
            logger.warning('Error retrieving request body for async work.')
        response = ''
    else:
        response = welcome
    start_response("200 OK", [
        ("Content-Type", "text/html"),
        ("Content-Length", str(len(response)))
    ])
    return [bytes(response, 'utf-8')]

pythonの中にHTMLを入れて、ファイル名と同じメソッド内にREST APIのPOSTメソッドの受信設定を入れてるようです。こう作るとREST APIアプリケーションになるんですね。(´Д｀)ﾎｴｰ

２．Elastic Beanstalkアプリケーション作成
　２－１．Elastic Beanstalk-[アプリケーションを作成]
　２－２．下記を入力
　　・環境枠：ウェブサーバー環境
　　・アプリケーション名：sample-python-app
　　・環境名：sample-python-env
　　・プラットフォームタイプ：マネージドプラットフォーム
　　・プラットフォーム：python
　　・アプリケーションコード：コードをアップロード
　　・バージョンラベル：1.0
　　・ソースコードのオリジン：ローカルファイル
　　・ファイル名：python.zip
　　・プリセット：単一インスタンス(無料利用枠の対象)
　２－３．[次へ]
　２－４．サービスアクセスの設定が表示されたら、[レビューまでスキップ]
　２－５．レビューが表示されたら、[送信]

３．動作確認
　３－１．Elastic Beanstalk-[環境]-[sample-python-env]
　３－２．[ドメイン]内のURLをクリックし、PythonのWelcomeページが表示されることを確認