When I deploy my Django app with Heroku there seems to be some problem with GDAL. When I run heroku logs --tail I get the following:

[...]
2022-01-14T11:20:56.792392 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/backends/postgis/base.py", line 6, in <module>
2022-01-14T11:20:56.792393 00:00 app[web.1]: from .features import DatabaseFeatures
2022-01-14T11:20:56.792393 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/backends/postgis/features.py", line 1, in <module>
2022-01-14T11:20:56.792394 00:00 app[web.1]: from django.contrib.gis.db.backends.base.features import BaseSpatialFeatures
2022-01-14T11:20:56.792394 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/backends/base/features.py", line 3, in <module>
2022-01-14T11:20:56.792394 00:00 app[web.1]: from django.contrib.gis.db import models
2022-01-14T11:20:56.792395 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/models/__init__.py", line 3, in <module>
2022-01-14T11:20:56.792395 00:00 app[web.1]: import django.contrib.gis.db.models.functions  # NOQA
2022-01-14T11:20:56.792395 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/models/functions.py", line 3, in <module>
2022-01-14T11:20:56.792396 00:00 app[web.1]: from django.contrib.gis.db.models.fields import BaseSpatialField, GeometryField
2022-01-14T11:20:56.792401 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/db/models/fields.py", line 3, in <module>
2022-01-14T11:20:56.792401 00:00 app[web.1]: from django.contrib.gis import forms, gdal
2022-01-14T11:20:56.792402 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/forms/__init__.py", line 3, in <module>
2022-01-14T11:20:56.792402 00:00 app[web.1]: from .fields import (  # NOQA
2022-01-14T11:20:56.792402 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/forms/fields.py", line 2, in <module>
2022-01-14T11:20:56.792402 00:00 app[web.1]: from django.contrib.gis.gdal import GDALException
2022-01-14T11:20:56.792403 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/gdal/__init__.py", line 28, in <module>
2022-01-14T11:20:56.792406 00:00 app[web.1]: from django.contrib.gis.gdal.datasource import DataSource
2022-01-14T11:20:56.792407 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/gdal/datasource.py", line 40, in <module>
2022-01-14T11:20:56.792407 00:00 app[web.1]: from django.contrib.gis.gdal.driver import Driver
2022-01-14T11:20:56.792407 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
2022-01-14T11:20:56.792407 00:00 app[web.1]: from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
2022-01-14T11:20:56.792408 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
2022-01-14T11:20:56.792408 00:00 app[web.1]: from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
2022-01-14T11:20:56.792408 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/site-packages/django/contrib/gis/gdal/libgdal.py", line 53, in <module>
2022-01-14T11:20:56.792409 00:00 app[web.1]: lgdal = CDLL(lib_path)
2022-01-14T11:20:56.792409 00:00 app[web.1]: File "/app/.heroku/python/lib/python3.9/ctypes/__init__.py", line 374, in __init__
2022-01-14T11:20:56.792409 00:00 app[web.1]: self._handle = _dlopen(self._name, mode)
2022-01-14T11:20:56.792409 00:00 app[web.1]: OSError: /opt/homebrew/opt/gdal/lib/libgdal.dylib: cannot open shared object file: No such file or directory
2022-01-14T11:20:56.792410 00:00 app[web.1]: [2022-01-14 11:20:56  0000] [10] [INFO] Worker exiting (pid: 10)
2022-01-14T11:20:56.895552 00:00 app[web.1]: [2022-01-14 11:20:56  0000] [4] [WARNING] Worker with pid 10 was terminated due to signal 15
2022-01-14T11:20:56.993856 00:00 app[web.1]: [2022-01-14 11:20:56  0000] [4] [INFO] Shutting down: Master
2022-01-14T11:20:56.993930 00:00 app[web.1]: [2022-01-14 11:20:56  0000] [4] [INFO] Reason: Worker failed to boot.
2022-01-14T11:20:57.168821 00:00 heroku[web.1]: Process exited with status 3
[...]

I'm using a PostgreSQL database with postgis enabled (it is a geolocation app).

I've installed this buildpack and my requirements.txt file has GDAL==2.4.0 in there (which aligns with the version the buildpack appears to install).

My understanding of dylibs is that they are a MACOS filetype - therefore Heroku is pointing to my local machine for GDAL rather than a Heroku dyno, I'm fairly new to all this but I believe I need to figure out why this is happening and how to change where Heroku is searching for GDAL.

Requirements.txt:

asgiref==3.4.1
beautifulsoup4==4.10.0
bs4==0.0.1
certifi==2021.10.8
cffi==1.15.0
charset-normalizer==2.0.10
cryptography==36.0.1
defusedxml==0.7.1
dj-database-url==0.5.0
Django==4.0.1
django-allauth==0.47.0
django-bootstrap-modal-forms==2.2.0
django-heroku==0.3.1
django-on-heroku==1.1.2
django-widget-tweaks==1.4.11
djangorestframework==3.13.1
GDAL==2.4.0
gunicorn==20.1.0
idna==3.3
oauthlib==3.1.1
psycopg2==2.9.3
psycopg2-binary==2.9.3
pycparser==2.21
PyJWT==2.3.0
python3-openid==3.2.0
pytz==2021.3
requests==2.27.1
requests-oauthlib==1.3.0
soupsieve==2.3.1
sqlparse==0.4.2
urllib3==1.26.8
whitenoise==5.3.0

CodePudding user response：

Okay, how I fixed this:

1. Make sure there is nothing funky to do with GDAL in your settings.py - I had followed this answer to get GDAL working on my local server during development and had to delete it the Paths from my settings.py
2. pip uninstall GDAL
3. pip freeze > requirements. txt
4. Add the heroku-geo-buildpack (link) and make sure it is set as the first buildpack for your app
5. git commit all your changes
6. Push the app again