flask-redis: dev envs support & misc improvements (#265)

(Most of this is almost identical to #263.)

* Docker Desktop Development Environments config
* Use cache volumes for pip
* Downgrade from Python 3.11 _alpha_ -> Python 3.10
* Use port `8000` to avoid conflicts with Airplay on
    macOS for default Flask port `5000`
* Use `SIGINT` to gracefully stop Flask
* Formatting fixes in `compose.yaml`

Signed-off-by: Milas Bowman <milas.bowman@docker.com>
master
Milas Bowman 2 years ago committed by GitHub
parent ec552567c7
commit b53e4542c9
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@ -0,0 +1,16 @@
services:
redis:
image: redislabs/redismod
ports:
- '6379:6379'
web:
build:
context: .
target: dev-envs
stop_signal: SIGINT
ports:
- '8000:8000'
volumes:
- /var/run/docker.sock:/var/run/docker.sock
depends_on:
- redis

@ -1,6 +1,27 @@
FROM python:3.11.0a6-alpine3.15 # syntax=docker/dockerfile:1.4
FROM --platform=$BUILDPLATFORM python:3.10-alpine AS builder
WORKDIR /code WORKDIR /code
COPY requirements.txt /code COPY requirements.txt /code
RUN pip install -r requirements.txt --no-cache-dir RUN --mount=type=cache,target=/root/.cache/pip \
pip3 install -r requirements.txt
COPY . /code COPY . /code
CMD python app.py
ENTRYPOINT ["python3"]
CMD ["app.py"]
FROM builder as dev-envs
RUN <<EOF
apk update
apk add git bash
EOF
RUN <<EOF
addgroup -S docker
adduser -S --shell /bin/bash --ingroup docker vscode
EOF
# install Docker tools (cli, buildx, compose)
COPY --from=gloursdocker/docker / /

@ -24,7 +24,7 @@ services:
web: web:
build: . build: .
ports: ports:
- "5000:5000" - "8000:8000"
volumes: volumes:
- .:/code - .:/code
depends_on: depends_on:
@ -55,12 +55,12 @@ Listing containers must show one container running and the port mapping as below
$ docker compose ps $ docker compose ps
NAME COMMAND SERVICE STATUS PORTS NAME COMMAND SERVICE STATUS PORTS
flask-redis-redis-1 "redis-server --load…" redis running 0.0.0.0:6379->6379/tcp flask-redis-redis-1 "redis-server --load…" redis running 0.0.0.0:6379->6379/tcp
flask-redis-web-1 "/bin/sh -c 'python …" web running 0.0.0.0:5000->5000/tcp flask-redis-web-1 "/bin/sh -c 'python …" web running 0.0.0.0:8000->8000/tcp
``` ```
After the application starts, navigate to `http://localhost:5000` in your web browser or run: After the application starts, navigate to `http://localhost:8000` in your web browser or run:
``` ```
$ curl localhost:5000 $ curl localhost:8000
This webpage has been viewed 2 time(s) This webpage has been viewed 2 time(s)
``` ```
@ -80,3 +80,14 @@ Stop and remove the containers
``` ```
$ docker compose down $ docker compose down
``` ```
## Use with Docker Development Environments
You can use this sample with the Dev Environments feature of Docker Desktop.
![Screenshot of creating a Dev Environment in Docker Desktop](../dev-envs.png)
To develop directly on the services inside containers, use the HTTPS Git url of the sample:
```
https://github.com/docker/awesome-compose/tree/master/flask-redis
```

@ -11,4 +11,4 @@ def hello():
return "This webpage has been viewed "+counter+" time(s)" return "This webpage has been viewed "+counter+" time(s)"
if __name__ == "__main__": if __name__ == "__main__":
app.run(host="0.0.0.0", debug=True) app.run(host="0.0.0.0", port=8000, debug=True)

@ -1,13 +1,18 @@
services: services:
redis: redis:
image: redislabs/redismod image: redislabs/redismod
ports: ports:
- '6379:6379' - '6379:6379'
web: web:
build: . build:
ports: context: .
- "5000:5000" target: builder
volumes: # flask requires SIGINT to stop gracefully
- .:/code # (default stop signal from Compose is SIGTERM)
depends_on: stop_signal: SIGINT
- redis ports:
- '8000:8000'
volumes:
- .:/code
depends_on:
- redis

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