Ed Morley
e621ff4d5e
* Updates bob-builder to a version that clears out the previous build directory, which prevents the stale files seen in #379. * Adds a `buildenv-heroku-16` Make command to simplify the building and use of the Heroku-16 binary build environment. * Sets `S3_BUCKET` and `S3_PREFIX` in the Docker image, to save having to do so manually each time. * Removes the duplication of the bob-builder dependency between `Dockerfile` and `requirements.txt`. * Disables the pip version check during Docker build, to avoid the noisy stderr warning about Ubuntu 16.04 pip being older (v8.1.1). * Adds a `.dockerignore` to speed up the Docker build, by reducing the build context transferred to the daemon from 60MB to 2MB. * Applies some Dockerfile best practices like disabling/removing cached files (since layer invalidation makes caching pointless).
Heroku Buildpack: Python
This is the official Heroku buildpack for Python apps, powered by pip and other excellent software.
Recommended web frameworks include Django and Flask. The recommended webserver is Gunicorn. There are no restrictions around what software can be used (as long as it's pip-installable). Web processes must bind to $PORT, and only the HTTP protocol is permitted for incoming connections.
Some Python packages with obscure C dependencies (e.g. scipy) are not compatible.
See it in Action
Deploying a Python application couldn't be easier:
$ ls
Procfile requirements.txt web.py
$ heroku create --buildpack heroku/python
$ git push heroku master
...
-----> Python app detected
-----> Installing python-2.7.13
$ pip install -r requirements.txt
Collecting requests (from -r requirements.txt (line 1))
Downloading requests-2.12.4-py2.py3-none-any.whl (576KB)
Installing collected packages: requests
Successfully installed requests-2.12.4
-----> Discovering process types
Procfile declares types -> (none)
A requirements.txt file must be present at the root of your application's repository.
You can also specify the latest production release of this buildpack for upcoming builds of an existing application:
$ heroku buildpacks:set heroku/python
Specify a Python Runtime
Specific versions of the Python runtime can be specified with a runtime.txt file:
$ cat runtime.txt
python-3.6.1
Runtime options include:
python-2.7.13python-3.6.1pypy-5.7.1(unsupported, experimental)pypy3-5.5.1(unsupported, experimental)