[Flask] flask uwsgi nginx deployment not working

tigernassau tigernassau at gmail.com
Wed Oct 7 01:03:54 CEST 2015


Hmm, looked at pull request - more confusion!   Would try emperor but 
see no docs on that - is your setup something you can post?.  Otherwise 
we have Bottle working nicely (and only seems to be missing session vs 
Flask, so it might be easier to just get Beaker working with Bottle

On 10/06/2015 03:03 PM, Jeff Widman wrote:
> I just setup Nginx + uWSGI + Flask the other day for the first time. 
> You're right, the Flask docs on uWSGI are outdated and use deprecated 
> uWSGI commands. There's a pull request in the Flask repo that shows 
> the correct way (as best I could tell) to set things up, it also 
> covers the slightly more complicated scenario of serving multiple 
> Flask apps on a single uWSGI socket.
>
> I take a cursory look through your code and nothing stuck out to me... 
> I used the Emperor option in place of the Master process option, as it 
> gives more flexibility, so maybe that's why I'm not seeing the 
> specific issue... maybe try that?
>>
> On Tue, Oct 6, 2015 at 9:03 AM, tigernassau <tigernassau at gmail.com 
> <mailto:tigernassau at gmail.com>> wrote:
>
>     we can only get Flask to load on a debian server with nginx, uwsgi
>     with a command line statement, not on server boot - yet we can get
>     bottle to load just fine.
>
>     most of the docs are either outdated, 80% complete, or different
>     combinations (ie gunicorn, mod_wsgi, uwsgi-plugin-python, systemd
>     ...) so we hope to write up a detailed set of docs that work for
>     this combination
>
>     Here's what we have:
>     nginx.conf
>          .....
>           upstream testapp {
>               server localhost: 8082;
>           }
>          .....
>          location / {
>                   try_files $uri @wsgi;
>           }
>           location @wsgi {
>                   include /etc/nginx/uwsgi_params;
>                   uwsgi_pass testapp
>           }
>          .....
>
>     /etc/uwsgi/apps-enabled/testapp.ini
>       [uwsgi]
>       socket = localhost: 8082
>       chdir = /home/testapp
>       file = app.py
>       master = true
>       plugins = python
>       uid = www-data
>       gid = www-data
>       vacuum = true
>
>     --- test command line run --- (works!)
>     sudo uwsgi --socket 127.0.0.1:8082 <http://127.0.0.1:8082>
>     --wsgi-file /home/testapp/app.py --callable app processes 4
>     --stats 127.0.0.1:9191 <http://127.0.0.1:9191>
>
>     /etc/systemd/system/testapp.service
>     [Unit]
>     Description=wsgi flask testapp
>     [Service]
>     ExecStart=uwsgi --socket 127.0.0.1:8082 <http://127.0.0.1:8082>
>     --wsgi-file /home/testapp/app.py --callable app --processes 4
>     Restart=always
>     KillSignal=SIGQUIT
>     Type=notify
>     StandardError=syslog
>     NotifyAccess=all
>
>     [Install]
>     WantedBy=multi-user.target
>
>     sudo service testapp start ==> error
>
>     The only difference we see between Flask not booting and Bottle
>     working is in the app run statement
>     Flask:
>     if __name__ == '__main__':
>       app.run()
>
>     Bottle:
>     if __name__ == '__main__':
>         bottle.run(host="127.0.0.1",port=8082)
>     else:
>         app = application = bottle.default_app()
>
>
>     maybe app run issue ??
>     maybe permission issue ?? (but wsgi ini works for bottle)
>     maybe systemd service file ??
>
>     thks.
>
>     -- 
>     Tiger Nassau, Inc.
>     www.tigernassau.com <http://www.tigernassau.com>
>
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>
>
>
> -- 
> *
> Jeff Widman*
> jeffwidman.com <http://www.jeffwidman.com/> | 740-WIDMAN-J (943-6265)
> <><
>
>
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-- 
Tiger Nassau, Inc.
www.tigernassau.com

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