This project follows on from my Writing_Django_2 project, which is a simple Hello World in Django 2 LTS.
[As might be expected, there were breaking changes between Django and Django 2. So rather than upgrade my Cloud_Django repo, it seemed to be a better idea to create the polls app in Django 2 and proceed from there, this time with Django 2 LTS.]
It will use gunicorn which is a web server for Django. Specifically, it is a WSGI server.
The plan of attack is as follows:
To install locally:
$ pip3 install --user gunicorn
Or simply use the requirements.txt file:
$ pip3 install --user -r requirements.txt
Verify the version:
$ gunicorn --version
gunicorn (version 20.0.2)
$Lets see if it runs (this needs to be in the same folder as manage.py):
$ cd polls
$ gunicorn polls.wsgi
[2019-11-27 09:49:15 -0500] [9766] [INFO] Starting gunicorn 20.0.2
[2019-11-27 09:49:15 -0500] [9766] [INFO] Listening at: http://127.0.0.1:8000 (9766)
[2019-11-27 09:49:15 -0500] [9766] [INFO] Using worker: sync
[2019-11-27 09:49:15 -0500] [9770] [INFO] Booting worker with pid: 9770
^C[2019-11-27 09:49:16 -0500] [9766] [INFO] Handling signal: int
[2019-11-27 14:49:17 +0000] [9770] [INFO] Worker exiting (pid: 9770)
[2019-11-27 09:49:17 -0500] [9766] [INFO] Shutting down: Master
$Now we need to open up gunicorn with a gunicorn.conf.py file (for some reason,
this config file needs to be tagged as a Python file). By default, gunicorn runs
locally and will only accept local connections. We will configure it to run in
promiscuous mode (which is a terrible practice, we should really run it behind
a front-end [nginx is recommended], but we can fix this later).
We will create this file as follows:
import multiprocessing
bind = "0.0.0.0:8000"
workers = multiprocessing.cpu_count() * 2 - 1Once more, with our config file:
$ gunicorn -c gunicorn.conf.py polls.wsgi
[2019-11-27 09:56:41 -0500] [9960] [INFO] Starting gunicorn 20.0.2
[2019-11-27 09:56:41 -0500] [9960] [INFO] Listening at: http://0.0.0.0:8000 (9960)
[2019-11-27 09:56:41 -0500] [9960] [INFO] Using worker: sync
[2019-11-27 09:56:41 -0500] [9965] [INFO] Booting worker with pid: 9965
[2019-11-27 09:56:41 -0500] [9967] [INFO] Booting worker with pid: 9967
[2019-11-27 09:56:41 -0500] [9969] [INFO] Booting worker with pid: 9969
[2019-11-27 09:56:41 -0500] [9970] [INFO] Booting worker with pid: 9970
[2019-11-27 09:56:41 -0500] [9973] [INFO] Booting worker with pid: 9973
[2019-11-27 09:56:41 -0500] [9975] [INFO] Booting worker with pid: 9975
[2019-11-27 09:56:41 -0500] [9976] [INFO] Booting worker with pid: 9976
^C[2019-11-27 09:57:14 -0500] [9960] [INFO] Handling signal: int
[2019-11-27 14:57:14 +0000] [9967] [INFO] Worker exiting (pid: 9967)
[2019-11-27 14:57:14 +0000] [9969] [INFO] Worker exiting (pid: 9969)
[2019-11-27 14:57:14 +0000] [9965] [INFO] Worker exiting (pid: 9965)
[2019-11-27 14:57:14 +0000] [9975] [INFO] Worker exiting (pid: 9975)
[2019-11-27 14:57:14 +0000] [9973] [INFO] Worker exiting (pid: 9973)
[2019-11-27 14:57:14 +0000] [9970] [INFO] Worker exiting (pid: 9970)
[2019-11-27 14:57:14 +0000] [9976] [INFO] Worker exiting (pid: 9976)
[2019-11-27 09:57:14 -0500] [9960] [INFO] Shutting down: Master
$Okay, everything runs.
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