Access logs from docker container

Question

I have a python server that I run in a docker container. I log my messages with logging from python and I don't know how to find/view my log file from the container.

# Pull base image
FROM python:3

# Copy code to the container
ADD src /usr/app
WORKDIR /usr/app

# run configuration
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Start script
CMD [ "python", "./main.py"]

I start the server like this:

sudo docker run -it -p 5000:5000 --rm my_app

How can I access server logs?

Thanks

Answer 1

docker logs --tail 200 -f docker-container-id

Answer 2

I think you can use -v parameter in your "docker run" to mount your host folder to a folder in container.

    sudo docker run -it -p 5000:5000 -v hostPath:containerPathContainingLogs --rm my_app

Then you will view your log in hostPath(It is mapped into containerPathContainingLogs in your container).

Or in another way, if your docker image contains bash, you can use docker ps -a, to find the container id you run, and "docker exec -it your-container-id bash" to login your container, cd to your log path and view your log.

Or you can try docker logs your-container-id.