開発でのDocker①の続き
やること
- テキスト入力をPOSTして画像を表示するWebアプリ
- 画像を返却するAPIサーバは既存のdnmonsterイメージを利用
- Redisサーバは既存のイメージを利用
Webアプリ
from flask import Flask, Response, request
import requests
import hashlib
import redis
app = Flask(__name__)
cache = redis.StrictRedis(host='redis', port=6379, db=0)
salt = "UNIQUE_SALT"
default_name = 'Joe Bloggs'
@app.route('/', methods=['GET', 'POST'])
def mainpage():
name = default_name
if request.method == 'POST':
name = request.form['name']
salted_name = salt + name
name_hash = hashlib.sha256(salted_name.encode()).hexdigest()
header = '<html><head><title>Identidock</title></head><body>'
body = '''<form method="POST">
Hello <input type="text" name="name" value="{0}">
<input type="submit" value="submit">
</form>
<p>You look like a:
<img src="/monster/{1}"/>
'''.format(name, name_hash)
footer = '</body></html>'
return header + body + footer
@app.route('/monster/<name>')
def get_identicon(name):
image = cache.get(name)
if image is None:
print ("Cache miss", flush=True)
r = requests.get('http://dnmonster:8080/monster/' + name + '?size=80')
image = r.content
cache.set(name, image)
return Response(image, mimetype='image/png')
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0')
Dockerfile
FROM python:3.4
RUN groupadd -r uwsgi && useradd -r -g uwsgi uwsgi
RUN pip install Flask==0.10.1 uWSGI==2.0.8 requests==2.5.1 redis==2.10.3
WORKDIR /app
COPY app /app
COPY cmd.sh /
EXPOSE 9090 9191
USER uwsgi
CMD ["/cmd.sh"]
docker-compose.yml
identidock:
build: .
ports:
- "5000:5000"
environment:
ENV: DEV
volumes:
- ./app:/app
links:
- dnmonster
- redis
dnmonster:
image: amouat/dnmonster:1.0
redis:
image: redis:3.0
起動
# docker-compose build
# docker-compose up
イメージの配布
# docker tag "identidock:0.1" "takaheraw/identidock:0.1"
# docker push takaheraw/identidock:0.1