Initial commit

Author: pagecloud

Dockerfile

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+FROM python:3.7-alpine
+WORKDIR /code
+ENV FLASK_APP=app.py
+ENV FLASK_RUN_HOST=0.0.0.0
+RUN apk add --no-cache gcc musl-dev linux-headers
+COPY requirements.txt requirements.txt
+RUN pip install -r requirements.txt
+EXPOSE 5000
+COPY . .
+CMD ["flask", "run"]

README.md

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+import time
+import redis
+from flask import Flask
+app = Flask(__name__)
+cache = redis.Redis(host='redis', port=6379)
+def get_hit_count():
+    retries = 5
+    while True:
+        try:
+            return cache.incr('hits')
+        except redis.exceptions.ConnectionError as exc:
+            if retries == 0:
+                raise exc
+            retries -= 1
+            time.sleep(0.5)
+
+@app.route('/')
+def hello():
+    count = get_hit_count()
+    return 'Page cloud! I have been seen {} times.\n'.format(count)

app.py

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+version: "3"
+services:
+  web:
+    build: .
+    ports: 
+      - "5000:5000"
+  redis:
+    image: redis:alpine

docker-compose.yaml

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+flask
+redis