Gunicorn Environment Variable Setting

问题:

I'm currently having difficulty passing environment variables into Gunicorn for my Django project. I'm on the latest 19.1 version. I have a wsgi.py file like so:

import os
import sys
from django.core.wsgi import get_wsgi_application

BASE_DIR = os.path.dirname(os.path.abspath(__file__))
PROJECT_DIR = os.path.abspath(os.path.join(BASE_DIR, '..'))

sys.path.append(PROJECT_DIR)
os.environ.setdefault("DJANGO_SETTINGS_MODULE", "app.settings")

def application(environ, start_response):
    _application = get_wsgi_application()
    os.environ['SERVER_ENV'] = environ['SERVER_ENV']
    os.environ['SERVER_ID'] = environ['SERVER_ID']
    return _application(environ, start_response)

When I run gunicorn from the command line as:

SERVER_ENV=TEST SERVER_ID=TEST gunicorn -b 127.0.0.1:8080 --error-logfile - --access-logfile - app.wsgi:application

and I then pass a request to gunicorn I keep getting:

2014-08-01 08:39:17 [21462] [ERROR] Error handling request
Traceback (most recent call last):
  File "/opt/virtualenv/python-2.7.5/django-1.5.5/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 93, in handle
    self.handle_request(listener, req, client, addr)
  File "/opt/virtualenv/python-2.7.5/django-1.5.5/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 134, in handle_request
    respiter = self.wsgi(environ, resp.start_response)
  File "/opt/sites/itracker/wsgi.py", line 18, in application
    os.environ['SERVER_ENV'] = environ['SERVER_ENV']
KeyError: 'SERVER_ENV'

Printing out the environ values confirms that the environment variables are not being passed in. I've tried setting the environment variables in the virtualenv activation script and also in a dedicated gunicorn shell script and also by setting the environment variables using the --env flag but nothing seems to work.

Any ideas?

回答1:

I got a similar problem when deploying gunicorn.service. And I passed environment variables to it by a file:

<on gunicorn.service>
[Service]
...
EnvironmentFile=/pathto/somefilewith_secrets
...

For example (cat /etc/systemd/system/gunicorn.service)

[Unit]  
Description=gunicorn daemon  
After=network.target  

[Service]  
User=ubuntu
Group=ubuntu
WorkingDirectory=/home/ubuntu/10008/digichainOpen
EnvironmentFile=/home/ubuntu/10008/digichainOpen/.env
ExecStart=/home/ubuntu/.local/share/virtualenvs/digichainOpen-Zk2Jnvjv/bin/gunicorn \
          --worker-class=gevent --workers 4 \
          --bind unix:/home/ubuntu/10008/digichainOpen/gunicorn.sock digichainOpen.wsgi:application

[Install]  
WantedBy=multi-user.target  

回答2:

You just have to export your environment variable.

export SERVER_ENV=TEST
export SERVER_ID=TEST
gunicorn -b 127.0.0.1:8080 --error-logfile - --access-logfile - app.wsgi:application

And in your code you can get them like that

os.getenv('SERVER_ENV')

回答3:

I don't quite understand what you are trying to do here. If you pass environment variables in the bash command line, they are already in os.environ: there is no need to get them from anywhere else. The environ dictionary is made up of elements passed from the request, not the shell.