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AWSのEC2上で、FlaskとKerasを使ってAI ウェブアプリを動かす

Last updated at Posted at 2017-04-21

以下の構成で deep learning アプリを構築しました。

Keras <-> Flask <-> uWSGI <-> socket <-> Nginx <-> Client

AWSでは月750時間(=31日x24時間)無料のEC2インスタンス t2.microを launchします

1. EC2で Deep Learning環境の構築

ssh接続の準備

key-pairのダウンロード

$ mkdir config
$ mv Download/riki-ssh.pem.txt config/riki-ssh.pem
$ chmod 600 config/riki-ssh.pem
# $ ssh -i config/riki-ssh.pem ubuntu@ec2-52-10-25-30.us-west-2.compute.amazonaws.com
$ ssh -i config/riki-ssh.pem ubuntu@<FQDN>

ubuntuのアップグレード

$ sudo apt-get update
$ sudo apt-get upgrade -y

ロケールの設定

$ sudo apt-get install language-pack-ja
$ sudo update-locale LANG=ja_JP.UTF-8

Python環境構築

$ sudo apt-get install -y build-essential python-pip python-dev git python-numpy swig python-dev default-jdk zip zlib1g-dev ipython
$ sudo apt-get install -y git gcc make openssl libssl-dev libbz2-dev libreadline-dev libsqlite3-dev
$ git clone https://github.com/yyuu/pyenv.git ~/.pyenv
$ git clone https://github.com/yyuu/pyenv-virtualenv.git ~/.pyenv/plugins/pyenv-virtualenv
$ touch .bash_profile
$ nano .bash_profile
.bash_profile
# pyenv
export PYENV_ROOT=$HOME/.pyenv
export PATH=$PYENV_ROOT/bin:$PATH
eval "$(pyenv init -)"
# virtualenv
eval "$(pyenv virtualenv-init -)"
export PYENV_VIRTUALENV_DISABLE_PROMPT=1
$ source .bash_profile
$ pyenv install 3.6.1
$ pyenv virtualenv 3.6.1 ML-3.6.1
$ pyenv global ML-3.6.1

keras環境の構築

$ sudo apt-get install -y graphviz libgraphviz-dev pkg-config
$ pip install -U numpy matplotlib pandas seaborn ipython jupyter
$ pip install -U tensorflow keras h5py pygraphviz pydot pydot_ng

動作テスト

$ git clone https://github.com/furukawa-ai/deeplearning_papers.git
$ cd deeplearning_papers/implementation/basics
$ python mlp.py

2. webアプリ(手書き文字認識)を動作させる

Keras <-> Flask <-> uwsgi <-> socket <-> Nginx <-> Client

まずEC2の設定で80番ポートを開放。

nginxをインストール

# (1) nginxサイトが配布するPGPキーを追加
curl http://nginx.org/keys/nginx_signing.key | sudo apt-key add -

# (2) リポジトリを一覧に追加
sudo sh -c "echo 'deb http://nginx.org/packages/ubuntu/ trusty nginx' >> /etc/apt/sources.list"
sudo sh -c "echo 'deb-src http://nginx.org/packages/ubuntu/ trusty nginx' >> /etc/apt/sources.list"

# (3) アップデート後、nginxをインストール
sudo apt-get update
sudo apt-get install nginx

$ sudo mv /etc/nginx/conf.d/default.conf /etc/nginx/conf.d/orig.default.conf.orig
$ sudo touch /etc/nginx/conf.d/uwsgi.conf
$ sudo nano /etc/nginx/conf.d/uwsgi.conf

server {
    listen       80;

    location / {
        include uwsgi_params;
        uwsgi_pass unix:///tmp/uwsgi.sock;
    }
}

$ sudo nginx -t
$ sudo service nginx start

flask, uwsgi をインストール、実行

$ pip install -U flask uwsgi
$ cd
$ git clone https://github.com/msrks/keras_num_pred.git
$ cd keras_num_pred
$ uwsgi --socket /tmp/uwsgi.sock --module app --callable app --chmod-socket=666 &

自動起動設定

$ sudo nano /etc/rc.local

sudo service nginx start
cd keras_num_pred; uwsgi --socket /tmp/uwsgi.sock --module app --callable app --chmod-socket=666 &
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