How to permanently "wire" an EC2 ip address to django in a virtualenv

Question

I'm trying to follow the tutorial at http://uwsgi-docs.readthedocs.org/en/latest/tutorials/Django_and_nginx.html. I am working with an ubuntu 14.4 instance on amazon EC2. I'm trying to deploy a django app I've developed locally with python3. So far I've got the app working following the tut as long as I manually ssh in , turn on the virtualenv and then turn on uwsgi, using :

workon env1
uwsgi --ini /home/ubuntu/mysite_uwsgi.ini

I noticed however that when I tried to send a request to the app this morning, that I was getting:

errno 5 input/output error

This was solved my manually sshing in and executing the 2 lines above. I don't understand how this works exactly , but somehow my virtualenv and uwsgi were deactivated after I logged off. I need to keep them active so that all requests can be funneled to my app. I don't know how to do this. Following the tut above , I've modified /etc/rc.local to:

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.    

workon myenv
uwsgi --ini /home/ubuntu/mysite_uwsgi.ini    


exit 0

Will this solve my problem. If not what should I do?

I doubt EC2 instances `sleep` or terminate automatically. You should give `gunicorn` a try, which has a daemon mode so you can disconnect from your SSH connection and still have it running in the background. Very easy to set up too http://docs.gunicorn.org/en/latest/index.html — Kedar, Mar 07 '15 at 18:38

Padraic Cunningham · Accepted Answer · 2015-03-24T18:51:41.110

1

You can daemonize the process:

env = DJANGO_SETTINGS_MODULE=mysite.settings # set an environment variable
pidfile = /tmp/project-master.pid # create a pidfile
harakiri = 20 # respawn processes taking more than 20 seconds
limit-as = 128 # limit the project to 128 MB
max-requests = 5000 # respawn processes after serving 5000 requests
"uwsgi --ini uwsgi.ini --daemonize=/var/log/yourproject.log # background the

edited Mar 24 '15 at 18:51

answered Mar 10 '15 at 16:45

Padraic Cunningham

176,452
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Thanks, using --daemonize = /var/log/yourproject.log worked for me – user1592380 Mar 10 '15 at 16:56
unfortunately no, I think there is an explanation of this at http://stackoverflow.com/questions/25715039/python-interplay-between-lib-site-packages-site-py-and-lib-site-py however – user1592380 Mar 10 '15 at 21:54
should look like "uwsgi --ini uwsgi.ini --daemonize=/var/log/yourproject.log" – user1592380 Mar 24 '15 at 17:08
Yes, this was more a note to myself/others. – user1592380 Mar 24 '15 at 19:27

score 0 · Answer 2 · answered Mar 07 '15 at 18:43

0

If you've followed the rest of the doc and are ready to run in "emperor" mode, add this to /etc/rc.local before exit 0:

/usr/local/bin/uwsgi --emperor /etc/uwsgi/vassals --uid www-data --gid www-data

answered Mar 07 '15 at 18:43

dylrei

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Hi, I'd love to set up emperor mode, but I ran into a problem : http://stackoverflow.com/questions/28903269/uwsgi-importerror-no-module-named-site-on-ubuntu – user1592380 Mar 07 '15 at 19:34

How to permanently "wire" an EC2 ip address to django in a virtualenv

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