如何在 Docker 容器内将流式应用程序部署到 Heroku？

Question

I recently started using streamlit , which is definitely an awesome library for Dashboarding and visualizing Machine Learning applications.

However, my deployment workflow is currently Docker and Heroku. I can't find simple documentation on how to easily deploy a streamlit app hosted within a Docker container onto Heroku. Therefore, I wanted to document something simple I found here.

Answer 1

After a little bit of research and play around with the code, this is the simplest way that seems to be working:

1. create .streamlit folder where a config.toml will live
2. Within the config.toml write the following code:

[browser]
serverAddress = '0.0.0.0'

3. Build your Dockerfile with whatever you want in simply at the end, add this command:

CMD streamlit run --server.port $PORT app.py

For example, here is my complete Dockerfile based on the code example that streamlit currently provides

FROM continuumio/miniconda3

WORKDIR /home/app

RUN apt-get update
RUN apt-get install nano unzip
RUN apt install curl -y

RUN curl -fsSL https://get.deta.dev/cli.sh | sh
RUN pip install boto3 pandas gunicorn streamlit
COPY . /home/app

CMD streamlit run --server.port $PORT app.py

In development, simply run your container with a PORT environment variable and a port mapping like this:

docker run -it MY_DOCKER_IMAGE -p HOST_PORT:CONTAINER_PORT -e PORT=CONTAINER_PORT

If everything works correctly locally, then you can follow this tutorial to deploy your container to Heroku:

• Deploy to heroku