Lab 6 - Heroku
Deploy the Django application created in Lab 4 to Heroku. Understand the reasoning behind Platform as a Service (PaaS) businesses like Heroku. You may follow the official documentation.
Setting up the Heroku CLI
Sign up for a free Heroku account at https://signup.heroku.com/.
Download and install the Heroku CLI tools.
- Use the default installation instructions if you are on a VM or your own device.
- If using a lab machine, download and extract the tarball and add the binary to your path.
wget https://cli-assets.heroku.com/heroku-linux-x64.tar.gz
tar -xvf heroku-linux-x64.tar.gz
export PATH="$PATH:$HOME/heroku/bin"
Ensure the heroku tool works, login to your account.
heroku --version
# heroku/7.19.4 linux-x64 node-v11.3.0
heroku login
Deploying our Django Application
Ensure the Django application created in Lab 4 is working locally.
Activate the virtualenv for the Django application.
Ensure that the current working directory is similar to the following.
$ tree
.
├── db.sqlite3
├── manage.py
├── mysite
│ ├── __init__.py
│ ├── settings.py
│ ├── urls.py
│ └── wsgi.py
└── polls
├── admin.py
├── apps.py
├── __init__.py
├── migrations
│ ├── 0001_initial.py
│ ├── __init__.py
│ └── __pycache__
│ ├── 0001_initial.cpython-37.pyc
│ └── __init__.cpython-37.pyc
├── models.py
├── tests.py
├── urls.py
└── views.py
Pip install gunicorn and django-on-heroku.
pip install gunicorn django-on-heroku
Save the new python requirements into the requirements.txt file.
pip freeze > requirements.txt
Create a new file named Procfile for Heroku applications. The file shall have following contents:
web: gunicorn mysite.wsgi
Within mysite/settings.py, add the following statements:
import django_on_heroku # top of the file
# ...
django_on_heroku.settings(locals()) # bottom of the file
Commit your files and deploy the application using a git integration.
What happens when you go to /polls on your Heroku deployed site?
Run your migrations, create a Superuser, and ensure your application functionality works.
$ heroku run --app APPNAME python manage.py migrate
$ heroku run --app APPNAME python manage.py createsuperuser
Question 1: What are some ways you can deploy your code to Heroku?
Question 2: What is a Procfile used for?
Question 3: What is the link to your deployed application (on herokuapps)?
Optional: Configure TravisCI or CircleCI for a deployment pipeline that utilizes tests.