Python/Flask/Gunicorn to Heroku

Question

This was all working up until this morning. I have no idea why it no longer works. It will run with heroku local but when I deploy, it doesn't work.

Requirements.txt includes gunicorn==19.7.1 Profile: web: gunicorn --bind 0.0.0.0:$PORT app:app

But heroku logs say: 2018-05-10T17:05:52.180162+00:00 heroku[web.1]: Process exited with status 127 2018-05-10T17:05:52.126101+00:00 app[web.1]: bash: gunicorn: command not found

Any ideas?!

Edited per request.... Pipfile:

[requires]
python_full_version = "2.7.15"

Pipfile.lock:

{
    "_meta": {
        "hash": {
            "sha256": "ddf17106580f080dfb1396654a2d3915f6eb52c46f4097c409cb3b1205ec403c"
        },
        "pipfile-spec": 6,
        "requires": {
            "python_full_version": "2.7.15"
        },
        "sources": [
            {
                "name": "pypi",
                "url": "https://pypi.python.org/simple",
                "verify_ssl": true
            }
        ]
    },
    "default": {},
    "develop": {}
}

Here are the logs. Is this what you need? Thanks for the help!

$ heroku logs
2018-05-10T21:07:57.901810+00:00 heroku[web.1]: Starting process with command `python app.py`
2018-05-10T21:08:00.042609+00:00 heroku[web.1]: Process exited with status 1
2018-05-10T21:08:00.084437+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T21:07:59.956948+00:00 app[web.1]: Traceback (most recent call last):
2018-05-10T21:07:59.956967+00:00 app[web.1]:   File "app.py", line 1, in <module>
2018-05-10T21:07:59.956975+00:00 app[web.1]:     from flask import Flask, render_template, url_for, request, session, redirect, jsonify, json, flash
2018-05-10T21:07:59.956976+00:00 app[web.1]: ImportError: No module named flask
2018-05-10T21:08:47.000000+00:00 app[api]: Build started by user alecdown@gmail.com
2018-05-10T21:08:54.680145+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=460372a5-6641-44b0-a509-480814c6314a fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:08:54.953954+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=16306630-95bf-4913-abc3-b568309bf0d7 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:09:00.281872+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T21:08:59.929228+00:00 app[api]: Release v7 created by user alecdown@gmail.com
2018-05-10T21:08:59.929228+00:00 app[api]: Deploy d7acedd1 by user alecdown@gmail.com
2018-05-10T21:08:47.000000+00:00 app[api]: Build succeeded
2018-05-10T21:09:04.721843+00:00 heroku[web.1]: Starting process with command `python app.py`
2018-05-10T21:09:07.217753+00:00 heroku[web.1]: Process exited with status 1
2018-05-10T21:09:07.266290+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T21:09:07.127011+00:00 app[web.1]: Traceback (most recent call last):
2018-05-10T21:09:07.127035+00:00 app[web.1]:   File "app.py", line 1, in <module>
2018-05-10T21:09:07.127038+00:00 app[web.1]:     from flask import Flask, render_template, url_for, request, session, redirect, jsonify, json, flash
2018-05-10T21:09:07.127041+00:00 app[web.1]: ImportError: No module named flask
2018-05-10T21:09:08.724431+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=d9d42e43-dfd1-4460-89e4-96947ad59c84 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:09:08.927890+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=dc35f7ec-2546-4e37-9117-9de54f6f7fb9 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:10:42.041785+00:00 app[api]: Starting process with command `bash` by user tk@heroku.com
2018-05-10T21:10:47.349507+00:00 heroku[run.7135]: State changed from starting to up
2018-05-10T21:10:47.224141+00:00 heroku[run.7135]: Awaiting client
2018-05-10T21:10:47.286860+00:00 heroku[run.7135]: Starting process with command `bash`
2018-05-10T21:12:38.169070+00:00 heroku[run.7135]: State changed from up to complete
2018-05-10T21:12:38.132500+00:00 heroku[run.7135]: Process exited with status 0
2018-05-10T21:12:40.484080+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=6f30f7fa-a596-410a-8c30-fb997d21d270 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:41.147917+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=e9f9ac9a-6d14-4467-9838-1265cb664d00 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:48.813788+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=80620f61-3bbd-4671-adb0-4064a9585c4f fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:49.147215+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=163f502c-210b-4956-8f2f-5f4500175e4f fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:54.477489+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=c2bed499-77fb-4ca7-b761-2c40f360cd57 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:54.768354+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=48cee808-8178-454f-b6bb-a044920a7353 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:57.775487+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=3d87f7db-e69e-4447-9fd8-dda75a0a7f72 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:12:58.163382+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=4bd5d918-32ef-44d4-918c-d66bbd7e31d9 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:13:04.157154+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=0b3ba795-827f-4d5d-b029-16abc9f51854 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:13:04.556643+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=c41e6643-eb24-4c08-b896-7027fd5a3590 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:28:40.011239+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T21:28:44.212653+00:00 heroku[web.1]: Starting process with command `python app.py`
2018-05-10T21:28:46.532487+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T21:28:46.507017+00:00 heroku[web.1]: Process exited with status 1
2018-05-10T21:28:46.451278+00:00 app[web.1]: Traceback (most recent call last):
2018-05-10T21:28:46.451297+00:00 app[web.1]:   File "app.py", line 1, in <module>
2018-05-10T21:28:46.451306+00:00 app[web.1]:     from flask import Flask, render_template, url_for, request, session, redirect, jsonify, json, flash
2018-05-10T21:28:46.451308+00:00 app[web.1]: ImportError: No module named flask
2018-05-10T21:44:26.551990+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=e16d1800-f61a-43ab-acdc-a6595cd8a8fe fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:44:26.832924+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=8e28982f-2193-4bd1-9eb2-43e05f96ba21 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T21:44:27.243184+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=ccb0d623-c9c9-48f6-b384-a2ef57d58907 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:05:18.124970+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T22:05:21.714142+00:00 heroku[web.1]: Starting process with command `python app.py`
2018-05-10T22:05:23.948792+00:00 app[web.1]: Traceback (most recent call last):
2018-05-10T22:05:23.948809+00:00 app[web.1]:   File "app.py", line 1, in <module>
2018-05-10T22:05:23.948817+00:00 app[web.1]:     from flask import Flask, render_template, url_for, request, session, redirect, jsonify, json, flash
2018-05-10T22:05:23.948818+00:00 app[web.1]: ImportError: No module named flask
2018-05-10T22:05:24.004641+00:00 heroku[web.1]: Process exited with status 1
2018-05-10T22:05:24.483293+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T22:07:01.651642+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=03c47479-0408-4f2e-80de-e2cea63cfb2f fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:07:02.342902+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=b67cd2d5-9d5e-4ebd-8860-5d154d8905b9 fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:07:02.792147+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=7fdbdae1-dee3-41d6-b5cd-29d69363a6ba fwd="155.98.26.248" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:42:56.282822+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=ff108727-d32a-4e56-a73a-9108eba66770 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:42:56.710680+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=8d089bb4-9eda-4ef3-a4bc-d50ce6d10fc8 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:42:57.270927+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=777a607f-e124-4c3b-a5a3-0fe66c702ad3 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:49:14.000000+00:00 app[api]: Build started by user alecdown@gmail.com
2018-05-10T22:49:27.099735+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T22:49:26.807919+00:00 app[api]: Deploy a090bedb by user alecdown@gmail.com
2018-05-10T22:49:14.000000+00:00 app[api]: Build succeeded
2018-05-10T22:49:26.807919+00:00 app[api]: Release v8 created by user alecdown@gmail.com
2018-05-10T22:49:32.712799+00:00 heroku[web.1]: Starting process with command `gunicorn --bind 0.0.0.0:58513 app:app`
2018-05-10T22:49:35.252130+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T22:49:35.254524+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T22:49:35.211745+00:00 heroku[web.1]: Process exited with status 127
2018-05-10T22:49:35.126880+00:00 app[web.1]: bash: gunicorn: command not found
2018-05-10T22:49:38.790250+00:00 heroku[web.1]: Starting process with command `gunicorn --bind 0.0.0.0:57125 app:app`
2018-05-10T22:49:40.816894+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T22:49:40.717556+00:00 app[web.1]: bash: gunicorn: command not found
2018-05-10T22:49:40.801628+00:00 heroku[web.1]: Process exited with status 127
2018-05-10T22:49:54.398172+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=e6d1dbca-d8ae-4000-ae9b-45eec22d34ce fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:49:54.798379+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=736ee6c5-39e0-4458-91f8-cab97ed41562 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:49:55.332567+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=1ae2a230-df67-4499-ac94-f84d13c27a2b fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:56:40.000000+00:00 app[api]: Build started by user alecdown@gmail.com
2018-05-10T22:57:26.773375+00:00 app[api]: Release v9 created by user alecdown@gmail.com
2018-05-10T22:57:26.773375+00:00 app[api]: Deploy 3e108bb0 by user alecdown@gmail.com
2018-05-10T22:57:27.233444+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T22:56:40.000000+00:00 app[api]: Build succeeded
2018-05-10T22:57:31.050572+00:00 heroku[web.1]: Starting process with command `gunicorn --bind 0.0.0.0:55771 app:app`
2018-05-10T22:57:32.513271+00:00 app[web.1]: bash: gunicorn: command not found
2018-05-10T22:57:32.564353+00:00 heroku[web.1]: Process exited with status 127
2018-05-10T22:57:32.879885+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T22:57:45.674727+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=84aded73-3ef0-4d7c-b7f7-893f9ff6b0c8 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:57:46.093177+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=7171a96d-862f-4bc2-b787-2d2f3150ff5c fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T22:57:46.585876+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=d5ae2aca-0064-4466-b079-662d658d4fa0 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T23:00:51.828849+00:00 heroku[web.1]: State changed from crashed to starting
2018-05-10T23:00:57.099099+00:00 heroku[web.1]: Starting process with command `gunicorn --bind 0.0.0.0:27152 app:app`
2018-05-10T23:00:59.400276+00:00 heroku[web.1]: Process exited with status 127
2018-05-10T23:00:59.297280+00:00 app[web.1]: bash: gunicorn: command not found
2018-05-10T23:01:01.333027+00:00 heroku[web.1]: State changed from starting to crashed
2018-05-10T23:01:27.016797+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=studentsrm.herokuapp.com request_id=bf75b42b-da4a-49f6-b6c4-0065c0936143 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https
2018-05-10T23:01:27.265794+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=studentsrm.herokuapp.com request_id=2086a1d4-1369-483b-bbc6-fb659b56beb8 fwd="128.110.67.141" dyno= connect= service= status=503 bytes= protocol=https

Answer 1

You can define your Python environment on Heroku in one of two ways:

1. With pip.

   You can include a requirements.txt file to list your requirements, and optionally use a runtime.txt file to specify a required Python version. In this case, Heroku will use pip to install your requirements:

   Heroku’s pip support is very transparent. Any requirements that install locally with the following command will behave as expected on Heroku:

   pip install -r requirements.txt
   

2. With pipenv.

   Alternatively, you can specify your requirements in a Pipfile and Pipfile.lock. This option lets you set your required Python version right in your Pipfile. In this case, your dependencies will be installed using pipenv.

You are currently using a mixture of both, and the pipenv workflow will take precedence over the pip workflow. If all three files are present, requirements.txt, Pipfile, and Pipfile.lock, your requirements.txt will be ignored.

There are two solutions:

1. Fully use pip.

   Delete your Pipfile and Pipfile.lock and add a runtime.txt file containing

   python-2.7.15
   

2. Fully use pipenv.

   Migrate your requirements from requirements.txt to Pipfile, run pipenv lock, letting pipenv see the dependencies, and remove requirements.txt.

   In this case you'll probably want to read the documentation for pipenv.