python-flask-docker

Basic Python Flask app in Docker which prints the hostname and IP of the container

Build application

Build the Docker image manually by cloning the Git repo. Dependencies must be in a file at the project root, named requirements.txt.

$ git clone https://github.com/au79/python-flask-docker.git
$ cd python-flask-docker
$ docker build -t au79/python-flask-docker .

Run the container

Create a container from the image. Bind mount your app directory t /app on the server.

$ docker run --name my-container -d -p 5000:5000 -v "$(pwd)/app":/app au79/python-flask-docker

Now visit http://localhost:5000

 The hostname of the container is 6095273a4e9b and its IP is 172.17.0.2. 

Verify the running container

Verify by checking the container ip and hostname (ID):

$ docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' my-container
172.17.0.2
$ docker inspect -f '{{ .Config.Hostname }}' my-container
6095273a4e9b

Live updates

Flask runs in development mode, any changes to files in the bind mount directory will trigger a server restart.

Note that the container must be rebuilt to pick up changes to dependencies in requirements.txt.