RE: VENV, Gunicorn, and Flask/Python Applications/BBBW

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1

Hello,

I have been messing around w/ Gunicorn as a server to run my Flask/Python applications. Flask is a developmental server installation and needs to have another bound server to run in a undeveloped way. Right?

Anyway…

Flask = no production server
Gunicorn = production server for running Flask/Python applications

Okay…

I just found a way to use my virtual environment installs and source to run on boot w/ a .service file w/ systemd.

…

Here: https://unix.stackexchange.com/questions/541288/is-running-a-uwsgi-gunicorn-server-on-boot-possible-w-a-venv.

Okay so, it works. yea! But…the server keeps running even after I stop my .service file or disable it.

Seth

P.S. Does anyone know how to cancel their Gunicorn server from running online even after the .service file has been stopped/disabled?

2

On Thu, 12 Sep 2019 19:17:45 -0700 (PDT), Mala Dies
<functt@gmail.com> declaimed the following:

Okay so, it works. yea! But...the server keeps running even after I stop my
.service file or disable it.

Seth

P.S. Does anyone know how to cancel their Gunicorn server from running
online even after the .service file has been stopped/disabled?

  You may need to add an
    ExecStop
line to the configuration. Can't help with what would be in that line

http://docs.gunicorn.org/en/stable/deploy.html#monitoring

has an entry for systemd...

[Service]
PIDFile=/run/gunicorn/pid
User=someuser
Group=someuser
RuntimeDirectory=gunicorn
WorkingDirectory=/home/someuser/applicationroot
ExecStart=/usr/bin/gunicorn --pid /run/gunicorn/pid \
          --bind unix:/run/gunicorn/socket applicationname.wsgi
ExecReload=/bin/kill -s HUP $MAINPID
ExecStop=/bin/kill -s TERM $MAINPID
PrivateTmp=true

though I'm not sure how $MAINPID gets set, especially as they appear to be
stuffing the PID into a file.

3

Hello Mr. Dennis,

Thank you. That makes sense. I am unaware of PIDs but I guess I can check w/ the ExecStop= function.

Seth

P.S. I will test it and return service.

4

Yes Sir,

I found the info. you were describing. You rule, matey!

Seth

P.S. http://docs.gunicorn.org/en/stable/deploy.html#systemd.

5

Hello Again Mr. Dennis,

Seth here. Hey! You were right about ExecStop=. I typed it in and added this line:

ExecStop=/home/debian/virt/env/bin/gunicorn -b 0.0.0.0:5000 -w 4 MyPythonFile:app-shutdown

Seth

P.S. It takes a couple seconds to shutdown but it shuts down where my server is not online any longer. It stopped the workers and the file from running.

6

Hello Mr. Dennis,

You are not going to believe this idea. I was running another script on the same port. This is the only reason it did not work. Aw!

Seth

P.S. Sorry to bother you.