I have a Flask/UWSGI application running on my home server. A recent Ubuntu upgrade deleted Python 3.10 and installed Python 3.12 instead. I’ve made a new venv and installed the application, but it no longer runs. In the UWSGI log it says:
<code>ModuleNotFoundError: No module named 'wsgi'
</code>
<code>ModuleNotFoundError: No module named 'wsgi'
</code>
ModuleNotFoundError: No module named 'wsgi'
My application is called sieve and the working directory is /usr/share/sieve. I’m using a ini file, /usr/share/sieve/sieve.ini, which looks like this:
<code>[uwsgi]
module = wsgi
callable = app
master = true
processes = 5
socket = /usr/share/sieve/sieve.sock
chmod-socket = 660
vacuum = true
die-on-term = true
logto = /usr/share/sieve/sieve.log
logfile-chown = jon:www-data
log-date = [%%Y-%%m-%%d %%H:%%M:%%S]
</code>
<code>[uwsgi]
module = wsgi
callable = app
master = true
processes = 5
socket = /usr/share/sieve/sieve.sock
chmod-socket = 660
vacuum = true
die-on-term = true
logto = /usr/share/sieve/sieve.log
logfile-chown = jon:www-data
log-date = [%%Y-%%m-%%d %%H:%%M:%%S]
</code>
[uwsgi]
module = wsgi
callable = app
master = true
processes = 5
socket = /usr/share/sieve/sieve.sock
chmod-socket = 660
vacuum = true
die-on-term = true
logto = /usr/share/sieve/sieve.log
logfile-chown = jon:www-data
log-date = [%%Y-%%m-%%d %%H:%%M:%%S]
I’ve also tried module=sieve.wsgi and module=wsgi:app as suggested elsewhere.
The application is in a sieve subdirectory and /usr/share/sieve/sieve/wsgi.py looks like this:
<code>#!/usr/bin/env python
from run_app import app
if __name__ == '__main__':
app.run(debug=True)
</code>
<code>#!/usr/bin/env python
from run_app import app
if __name__ == '__main__':
app.run(debug=True)
</code>
#!/usr/bin/env python
from run_app import app
if __name__ == '__main__':
app.run(debug=True)
The service definition includes these lines:
<code>WorkingDirectory=/usr/share/sieve
Environment="PATH=$PATH:/usr/share/sieve/venv/bin"
ExecStart=/usr/share/sieve/venv/bin/uwsgi --ini sieve.ini --enable-threads
</code>
<code>WorkingDirectory=/usr/share/sieve
Environment="PATH=$PATH:/usr/share/sieve/venv/bin"
ExecStart=/usr/share/sieve/venv/bin/uwsgi --ini sieve.ini --enable-threads
</code>
WorkingDirectory=/usr/share/sieve
Environment="PATH=$PATH:/usr/share/sieve/venv/bin"
ExecStart=/usr/share/sieve/venv/bin/uwsgi --ini sieve.ini --enable-threads
I’m not sure what has changed since it was last working, but looking further up the log, this setup worked fine:
<code>[2024-08-27 21:32:30] - *** Starting uWSGI 2.0.21 (64bit) on [Tue Aug 27 21:32:30 2024] ***
[2024-08-27 21:32:30] - compiled with version: 11.3.0 on 20 November 2022 14:54:48
[2024-08-27 21:32:30] - os: Linux-6.8.0-40-generic #40~22.04.3-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 30
17:30:19 UTC 2
</code>
<code>[2024-08-27 21:32:30] - *** Starting uWSGI 2.0.21 (64bit) on [Tue Aug 27 21:32:30 2024] ***
[2024-08-27 21:32:30] - compiled with version: 11.3.0 on 20 November 2022 14:54:48
[2024-08-27 21:32:30] - os: Linux-6.8.0-40-generic #40~22.04.3-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 30
17:30:19 UTC 2
</code>
[2024-08-27 21:32:30] - *** Starting uWSGI 2.0.21 (64bit) on [Tue Aug 27 21:32:30 2024] ***
[2024-08-27 21:32:30] - compiled with version: 11.3.0 on 20 November 2022 14:54:48
[2024-08-27 21:32:30] - os: Linux-6.8.0-40-generic #40~22.04.3-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 30
17:30:19 UTC 2
The current version does not work (with the same site code and config).
<code>[2024-09-24 20:33:49] - *** Starting uWSGI 2.0.27 (64bit) on [Tue Sep 24 20:33:49 2024] ***
[2024-09-24 20:33:49] - compiled with version: 13.2.0 on 24 September 2024 18:04:08
[2024-09-24 20:33:49] - os: Linux-6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:02:04 UTC 2024
</code>
<code>[2024-09-24 20:33:49] - *** Starting uWSGI 2.0.27 (64bit) on [Tue Sep 24 20:33:49 2024] ***
[2024-09-24 20:33:49] - compiled with version: 13.2.0 on 24 September 2024 18:04:08
[2024-09-24 20:33:49] - os: Linux-6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:02:04 UTC 2024
</code>
[2024-09-24 20:33:49] - *** Starting uWSGI 2.0.27 (64bit) on [Tue Sep 24 20:33:49 2024] ***
[2024-09-24 20:33:49] - compiled with version: 13.2.0 on 24 September 2024 18:04:08
[2024-09-24 20:33:49] - os: Linux-6.8.0-45-generic #45-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 30 12:02:04 UTC 2024
Why has my application stopped working and what to I need to do to make UWSGI find the module again?
Figured it out – the answer is to update the service definition so the working directory is the code root.
<code>WorkingDirectory=/usr/share/sieve/sieve
</code>
<code>WorkingDirectory=/usr/share/sieve/sieve
</code>
WorkingDirectory=/usr/share/sieve/sieve
I guess Python 3.12 is a bit more strict about project structure. Ideally I should rewrite this so the different parts of the application can be imported properly, but it works now, so this will do!