Can't run gunicorn on port 80 while deploying django app on AWS EC2

Question

I am running Ubuntu 14.04 instance in my EC2 AWS.

I can run gunicorn -b 0.0.0.0:8000 myapp.wsgi

but it fails to run at port 80

gunicorn -b 0.0.0.0:80 myapp.wsgi --> Fails

I tried to follow this answer (I couldn't understand it though, whats deployment script ?) Getting Gunicorn to run on port 80

But it didn't work.

I also tried running it with elevated permission sudo in vain. Error on running at port 80:

ubuntu@ip-172-31-39-159:~/jeequery$ gunicorn -b 0.0.0.0:80 rubiks.wsgi
[2015-08-30 15:58:10 +0000] [6772] [INFO] Starting gunicorn 19.3.0
[2015-08-30 15:58:10 +0000] [6772] [ERROR] Retrying in 1 second.
[2015-08-30 15:58:11 +0000] [6772] [ERROR] Retrying in 1 second.
[2015-08-30 15:58:12 +0000] [6772] [ERROR] Retrying in 1 second.
[2015-08-30 15:58:13 +0000] [6772] [ERROR] Retrying in 1 second.
[2015-08-30 15:58:14 +0000] [6772] [ERROR] Retrying in 1 second.
[2015-08-30 15:58:15 +0000] [6772] [ERROR] Can't connect to ('0.0.0.0', 80)

On running with sudo I get this error:

ubuntu@ip-172-31-39-159:~$ gunicorn -b 0.0.0.0:80 rubiks.wsgi
[2015-08-30 16:48:09 +0000] [6943] [INFO] Starting gunicorn 19.3.0
[2015-08-30 16:48:09 +0000] [6943] [ERROR] Retrying in 1 second.
[2015-08-30 16:48:10 +0000] [6943] [ERROR] Retrying in 1 second.
[2015-08-30 16:48:11 +0000] [6943] [ERROR] Retrying in 1 second.
^C[2015-08-30 16:48:12 +0000] [6943] [ERROR] Retrying in 1 second.
[2015-08-30 16:48:13 +0000] [6943] [ERROR] Retrying in 1 second.
[2015-08-30 16:48:14 +0000] [6943] [ERROR] Can't connect to ('0.0.0.0', 80)
ubuntu@ip-172-31-39-159:~$ ^C
ubuntu@ip-172-31-39-159:~$ sudo gunicorn -b 0.0.0.0:80 rubiks.wsgi
[2015-08-30 16:48:21 +0000] [6947] [INFO] Starting gunicorn 19.3.0
[2015-08-30 16:48:21 +0000] [6947] [INFO] Listening at: http://0.0.0.0:80 (6947)
[2015-08-30 16:48:21 +0000] [6947] [INFO] Using worker: sync
[2015-08-30 16:48:21 +0000] [6950] [INFO] Booting worker with pid: 6950
[2015-08-30 16:48:21 +0000] [6950] [ERROR] Exception in worker process:
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/arbiter.py", line 507, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/workers/base.py", line 118, in init_process
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/util.py", line 355, in import_app
    __import__(module)
ImportError: No module named 'rubiks'
Traceback (most recent call last):
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/arbiter.py", line 507, in spawn_worker
    worker.init_process()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/workers/base.py", line 118, in init_process
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/wsgiapp.py", line 65, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python3.4/dist-packages/gunicorn/util.py", line 355, in import_app
    __import__(module)
ImportError: No module named 'rubiks'
[2015-08-30 16:48:21 +0000] [6950] [INFO] Worker exiting (pid: 6950)
[2015-08-30 16:48:21 +0000] [6947] [INFO] Shutting down: Master
[2015-08-30 16:48:21 +0000] [6947] [INFO] Reason: Worker failed to boot.

Answer 1

As suggested in comments, its not recommended to run gunicorn on port 80 .

We instead run it on port greater than 1024 (non privileged ports) and by reverse poxy request to port greater than 1014 running on gunicorn .

This can be done by editing nginx config file.

Answer 2

**It seems that you have not added port 80 to your security groups..

Also you will have to use sudo before your command to access port 80

Hope this helps**