如何使用gunicorn将heroku nginx buildpack添加到python django应用程序中？

Question

I am trying to deploy a python with django on heroku and configure an nginx reverse proxy to have like a filter which won't let the requests pass to my django backend until the token is checked to an third party IDP.

** STEP 1 **

I am following this tutorial to add the nginx buildpack : https://elements.heroku.com/buildpacks/hq-mobile/v3-nginx-buildpack

After I've added the buildpack and start the app, I get the following message: bin/start-nginx: line 37: bundle: command not found

After some digging I noticed some paths need to be added to the config vars for the heroku app in order for bundler to get the needed dependencies :

So I've added this paths:

heroku config:add GEM_PATH=vendor/bundle/1.9.3

heroku config:set PATH=bin:vendor/bundle/ruby/1.9.3/bin:/usr/local/bin:/usr/bin:/bin 

Then the config/unicorn.rb file:

require 'fileutils'
listen '/tmp/nginx.socket'
before_fork do |server,worker|
  FileUtils.touch('/tmp/app-initialized')
end

Procfile :

web: bin/start-nginx bundle exec unicorn -c config/unicorn.rb gunicorn -c gunicorn.conf.py MyApp.wsgi

gunicorn.conf.py

# gunicorn.conf
def when_ready(server):
    # touch app-initialized when ready
    open('/tmp/app-initialized', 'w').close()

bind = 'unix:///tmp/nginx.socket'
workers = 4

Even after adding this, the error still persists.

** STEP 2 **

Once the normal buildpack will be in place I want to follow this tutorial to configure nginx how I want:

https://www.nginx.com/blog/validating-oauth-2-0-access-tokens-nginx/

What configuration is needed to be able to have this buildpack working in my situation?

Answer 1

To fix this problem, you remove the bundle exec part from the Procfile. In other words, your Procfile becomes:

web: bin/start-nginx unicorn -c config/unicorn.rb gunicorn -c gunicorn.conf.py MyApp.wsgi

(sidenote: there might be an error with just using MyApp.wsgi since you might need to change it to something like MyApp.wsgi:application to expose the environment variable for your application)