add flask sample

Signed-off-by: kouul <maulloohans@gmail.com>
master
kouul 5 years ago
parent 56b4dc0cf9
commit 83a24f681f

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## Compose sample application
### Python/Flask application with Nginx proxy and a Mongo database
Project structure:
```
.
├── docker-compose.yaml
├── app
   ├── Dockerfile
   ├── requirements.txt
   └── app.py
```
[_docker-compose.yaml_](docker-compose.yaml)
```
services:
web:
build: app
ports:
- '5000:5000'
```
## Deploy with docker-compose
```
$ docker-compose up -d
Creating network "flask_default" with the default driver
Building web
Step 1/6 : FROM python:3.7-alpine
...
...
Status: Downloaded newer image for python:3.7-alpine
Creating flask_web_1 ... done
```
## Expected result
Listing containers must show two containers running and the port mapping as below:
```
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c126411df522 flask_web "python3 app.py" About a minute ago Up About a minute 0.0.0.0:5000->5000/tcp flask_web_1
```
After the application starts, navigate to `http://localhost:5000` in your web browser or run:
```
$ curl localhost:5000
Hello World!
```
Stop and remove the containers
```
$ docker-compose down
```

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FROM python:3.7-alpine
WORKDIR /app
COPY . /app
RUN pip3 install -r requirements.txt
ENTRYPOINT ["python3"]
CMD ["app.py"]

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from flask import Flask
app = Flask(__name__)
@app.route('/')
def hello():
return "Hello World!"
if __name__ == '__main__':
app.run(host='0.0.0.0')

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version: '3'
services:
web:
build: app
ports:
- '5000:5000'
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