#author("2019-05-12T10:14:59+00:00","","")
#mynavi(AWSメモ)
#setlinebreak(on);


* 目次 [#jf8eb443]
#contents
- 参考
-- [[https://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/eb-cli3.html]]
-- [[https://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/create-deploy-python-flask.html#python-flask-setup-venv]]
- 関連

* 準備 [#ze45912e]
* 概要 [#gbb526bd]
#html(<div style="padding-left: 10px;">)
ここでは Elastic Beanstalk のコマンドラインインターフェースである EB CLI を使用してアプリケーションのデプロイ 及び 手動でのスケールを行う。
尚、当記事では Auto Scaling や ELB、Cloudformatrion については記載しない。（別記事にて記載予定）
#html(</div>)

** EB CLIのインストール [#h6056e25]

* EB CLIのインストール [#h6056e25]
#html(<div style="padding-left: 10px;">)

参考
https://docs.aws.amazon.com/ja_jp/elasticbeanstalk/latest/dg/eb-cli3-install.html

EB CLIインストール
#myterm2(){{
pip install awsebcli --upgrade --user
}}

PATHに追加
#myterm2(){{
echo PATH=~/Library/Python/3.X/bin:\$PATH>>~/.bash_profile
source ~/.bash_profile
}}

#html(</div>)

* プロジェクトフォルダ作成 [#o59d6264]
#html(<div style="padding-left: 10px;">)
#myterm2(){{
mkdir SampleApp1
cd SampleApp1
}}
#html(</div>)

* デプロイするアプリケーションの作成 [#hf7a8575]
#html(<div style="padding-left: 10px;">)

** 仮想環境作成 [#n6662cf1]
#myterm2(){{
python3 -m venv venv
source ./venv/bin/activate
}}

** flaskインストール [#maca2aa9]
#myterm2(){{
pip install flask
}}

** パッケージ一括インストール用に requirements.txt を作成 [#jdc5e0de]
#myterm2(){{
pip freeze >requirements.txt
}}

** サンプルアプリケーション作成 [#i950ac0e]

application.py
#mycode2(){{
from flask import Flask
import datetime

# wsgi で動作するので 変数名を application にしておく。(起動用のファイルを別で作成しても良いかも)
application = Flask(__name__)

@application.route('/')
def index():
    now = datetime.datetime.now().strftime('%H:%M:%S.%f')
    return f'<h1>top page!({now})</h1>\n'

@application.route('/sample')
def sample():
    now = datetime.datetime.now().strftime('%H:%M:%S.%f')
    return f'<h1>sample page!({now})</h1>\n'

if __name__ == '__main__':
    application.run(debug=True)
}}

動作確認用にflask起動
#myterm2(){{
python application.py
 * Serving Flask app "app" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 158-691-400
}}

別ターミナルから動作確認
#myterm2(){{
curl http://127.0.0.1:5000/
&lt;h1&gt;top page!(20:02:44.414536)&lt;/h1&gt;
}}
※問題なければ、起動したflaskを CTRL+C で終了。

#html(</div>)

* デプロイ [#d3fb37a4]
#html(<div style="padding-left: 10px;">)

** EB CLI でプロジェクトを初期化 [#b958de2a]

※以下は、「eb init -p python-3.6 SampleApp1 --region ap-northeast-1」と同義。

#myterm2(){{
eb init
Select a default region
1) us-east-1 : US East (N. Virginia)
2) us-west-1 : US West (N. California)
3) us-west-2 : US West (Oregon)
4) eu-west-1 : EU (Ireland)
5) eu-central-1 : EU (Frankfurt)
6) ap-south-1 : Asia Pacific (Mumbai)
7) ap-southeast-1 : Asia Pacific (Singapore)
8) ap-southeast-2 : Asia Pacific (Sydney)
9) ap-northeast-1 : Asia Pacific (Tokyo)
10) ap-northeast-2 : Asia Pacific (Seoul)
11) sa-east-1 : South America (Sao Paulo)
12) cn-north-1 : China (Beijing)
13) cn-northwest-1 : China (Ningxia)
14) us-east-2 : US East (Ohio)
15) ca-central-1 : Canada (Central)
16) eu-west-2 : EU (London)
17) eu-west-3 : EU (Paris)
18) eu-north-1 : EU (Stockholm)
(default is 3): 9

Enter Application Name
(default is "SampleApp1"): 
Application SampleApp1 has been created.

Select a platform.
1) Node.js
2) PHP
3) Python
4) Ruby
5) Tomcat
6) IIS
7) Docker
8) Multi-container Docker
9) GlassFish
10) Go
11) Java
12) Packer
(default is 1): 3

Select a platform version.
1) Python 3.6
2) Python 3.4
3) Python 3.4 (Preconfigured - Docker)
4) Python 2.7
5) Python
(default is 1): 1
Cannot setup CodeCommit because there is no Source Control setup, continuing with initialization
Do you want to set up SSH for your instances?
(Y/n): n
}}

** venvをデプロイ対象から外す [#ne21813e]
#myterm2(){{
echo venv>>.ebignore
}}

** SSH鍵の設定 [#s441ea82]
#myterm2(){{
eb init
Do you want to set up SSH for your instances?
(y/n): y
Select a keypair.
1) my-keypair
2) [ Create new KeyPair ]
}}

** デプロイ＆起動 [#f47b4ff3]
#myterm2(){{
eb create eb-sample-app1
}}

** 起動確認 [#y5cbb71c]
#myterm2(){{
eb open eb-sample-app1
}}

** スケール [#r883af92]
#html(<div style="padding-left: 10px;">)

インスタンス数を2に増やす
#myterm2(){{
eb scale 2 eb-sample-app1
}}

増えたか確認
#myterm2(){{
aws ec2 describe-instances --filter "Name=tag:Name,Values=eb-sample-app1" "Name=instance-state-name,Values=running" --output text | grep INSTANCES | wc -l
       2
}}

インスタンス数を1に減らす
#myterm2(){{
eb scale 1 eb-sample-app1
}}

減ったか確認
#myterm2(){{
aws ec2 describe-instances --filter "Name=tag:Name,Values=eb-sample-app1" "Name=instance-state-name,Values=running" --output text | grep INSTANCES | wc -l
       1
}}

#html(</div>)

** 終了 [#uc72e2d4]
#myterm2(){{
eb terminate eb-sample-app1
}}

#html(</div>)
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