Application served by uWSGI with Supervisord from Docker - django

Question

I am trying to serve a Django application with uWSGI from Docker. I am using supervisord to start the process for me at the end of the Dockerfile. When I run the image, it says that the uWSGI process starts and succeeds, but I'm unable to view the application at the URL I thought would display it. Perhaps I do not have things set up/configured correctly?
I am not having supervisord start nginx right now because I am currently serving static files via Amazon S3, and want to first focus on getting the wsgi up and running.
I am successful in running the application using uwsgi locally by doing uwsgi --init uwsgi.ini:local, but I am having trouble moving it into docker.
Here is my Dockerfile
FROM ubuntu:14.04
# Get most recent apt-get
RUN apt-get -y update
# Install python and other tools
RUN apt-get install -y tar git curl nano wget dialog net-tools build-essential
RUN apt-get install -y python3 python3-dev python-distribute
RUN apt-get install -y nginx supervisor
# Get Python3 version of pip
RUN apt-get -y install python3-setuptools
RUN easy_install3 pip
RUN pip install uwsgi
RUN apt-get install -y python-software-properties
# Install GEOS
RUN apt-get -y install binutils libproj-dev gdal-bin
# Install node.js
RUN apt-get install -y nodejs npm
# Install postgresql dependencies
RUN apt-get update && \
apt-get install -y postgresql libpq-dev && \
rm -rf /var/lib/apt/lists
ADD . /home/docker/code
# Setup config files
RUN echo "daemon off;" >> /etc/nginx/nginx.conf
RUN rm /etc/nginx/sites-enabled/default
RUN ln -s /home/docker/code/nginx-app.conf /etc/nginx/sites-enabled/
RUN ln -s /home/docker/code/supervisor-app.conf /etc/supervisor/conf.d/
RUN pip install -r /home/docker/code/app/requirements.txt
EXPOSE 8080
CMD ["supervisord", "-c", "/home/docker/code/supervisor-app.conf", "-n"]
And here is my uwsgi.ini
[uwsgi]
# this config will be loaded if nothing specific is specified
# load base config from below
ini = :base
# %d is the dir this configuration file is in
socket = %dmy_app.sock
master = true
processes = 4
[dev]
ini = :base
# socket (uwsgi) is not the same as http, nor http-socket
socket = :8001
[local]
ini = :base
http = :8000
# set the virtual env to use
home=/Users/my_user/.virtualenvs/my_env
[base]
# chdir to the folder of this config file, plus app/website
chdir = %dmy_app/
# load the module from wsgi.py, it is a python path from
# the directory above.
module=my_app.wsgi:application
# allow anyone to connect to the socket. This is very permissive
chmod-socket=666
http = :8080
And here is my supervisor-app.conf file
[program:app-uwsgi]
command = /usr/local/bin/uwsgi --ini /home/docker/code/uwsgi.ini
From a MAC using boot2docker, I am trying to access the application at $(boot2docker ip):8080
Ultimately I want to upload this container to AWS Elastic Beanstalk, with not only a uWSGI process running, but a celery worker running as well.
When I run my container, I can see from the logs that both supervisor and uwsgi successfully start. I was able to get things running on my local machine both using uwsgi by itself and uwsgi through supervisor, but for some reason when I containerize the thing I can't find it anywhere.
Here is what is logged when I boot up the docker container
2014-12-25 15:08:03,950 CRIT Supervisor running as root (no user in config file)
2014-12-25 15:08:03,953 INFO supervisord started with pid 1
2014-12-25 15:08:04,957 INFO spawned: 'uwsgi' with pid 9
2014-12-25 15:08:05,970 INFO success: uwsgi entered RUNNING state, process has stayed up for > than 1 seconds (startsecs)

Answer 1

How are you starting the docker container?
I don't see any CMD or ENTRYPOINT script, so I'm unclear as to how anything is getting started.
In general, I would advise avoiding things like supervisord unless absolutely necessary, just start uWSGI in the foreground from a CMD line. Try adding the following as the last line in the Dockerfile:
CMD ["/usr/local/bin/uwsgi", "--ini", "/home/docker/code/uwsgi.ini"]
and then just run with docker run -p 8000:8000 image_name. You should get some reply from uWSGI. If that works, I recommend you move the other services (postgres, node, to separate containers). There are official images for Node, Python and Postgres which should save you some time.
Remember, Docker containers only run as long as their main process (which must be in the foreground).