Heroku can't find gunicorn command
Solution 1
Add gunicorn
to requirements.txt
.
In pursuit of 12-factor apps, changes to the filesystem made with heroku run
are ephemeral.
Solution 2
I ran into this same issue.
After doing some research, I found this tutorial where they explain that any "local" changes (like importing/using a new module) must be "installed" in the heroku app using pipenv.
So in this case what I did was:
$ pipenv install gunicorn
This will "install" gunicorn in you app and add an entry into your (or create a new) Pipfile, which is how Heroku keeps track of the dependencies it needs to install for your app (I believe the use of requirements.txt is still supported, but not what they recommend).
Then, in order to 'activate' the pip environment that has gunicorn installed you must run:
$ pipenv shell
NOTE: You can test whether it worked or not by running $ heroku local
$ heroku local
[WARN] No ENV file found
23:10:25 web.1 | /bin/sh: gunicorn: command not found
23:10:25 web.1 Exited with exit code 127
With pip environment activated:
$ pipenv shell
Spawning environment shell (/bin/bash). Use 'exit' to leave.
. /Users/carlos/.local/share/virtualenvs/app-jKOcg6b1/bin/activate
bash-3.2$ . /Users/carlos/.local/share/virtualenvs/app-jKOcg6b1/bin/activate
(app-jKOcg6b1) bash-3.2$ heroku local
[WARN] No ENV file found
06:31:12 web.1 | [2018-06-05 06:31:12 -0600] [28531] [INFO] Starting gunicorn 19.8.1
06:31:13 web.1 | [2018-06-05 06:31:12 -0600] [28531] [INFO] Listening at: http://0.0.0.0:5000 (28531)
06:31:13 web.1 | [2018-06-05 06:31:12 -0600] [28531] [INFO] Using worker: sync
06:31:13 web.1 | [2018-06-05 06:31:12 -0600] [28535] [INFO] Booting worker with pid: 28535
Related videos on Youtube
blacktrance
Updated on September 14, 2022Comments
-
blacktrance over 1 year
I'm trying to put a small Flask app on Heroku. When it starts, it gives me the following message, from the logs:
2015-03-11T01:05:26.737788+00:00 heroku[web.1]: State changed from crashed to starting 2015-03-11T01:05:31.409851+00:00 heroku[web.1]: Starting process with command `gunicorn app:app` 2015-03-11T01:05:33.863601+00:00 app[web.1]: bash: gunicorn: command not found 2015-03-11T01:05:34.644419+00:00 heroku[web.1]: Process exited with status 127 2015-03-11T01:05:34.668264+00:00 heroku[web.1]: State changed from starting to crashed
My Procfile is
web: gunicorn application:app
, and application.py is the file I want to run. I looked up this problem and saw that it was sometimes caused by gunicorn not being in requirements.txt, but my requirements.txt has it, with this line:
gunicorn==19.3.0
. I tried running
heroku run pip install gunicorn
and it told me it installed gunicorn-19.3.0 successfully. But when I tried running it on Heroku with
heroku run gunicorn
it against gave me the "bash: gunicorn: command not found" message.