Gunicorn

How to contribute

This document explains the processes and practices recommended for contributing enhancements to the Gunicorn-k8s operator.

• Generally, before developing enhancements to this charm, you should consider opening an issue explaining your use case.
• If you would like to chat with us about your use-cases or proposed implementation, you can reach us at Canonical Mattermost public channel or Discourse.
• Familiarising yourself with the Charmed Operator Framework library will help you a lot when working on new features or bug fixes.
• All enhancements require review before being merged. Code review typically examines
  • code quality
  • test coverage
  • user experience for Juju administrators of this charm.
• Please help us out in ensuring easy to review branches by rebasing your pull request branch onto the main branch. This also avoids merge commits and creates a linear Git commit history.

Developing

The code for this charm can be downloaded as follows:

git clone https://github.com/canonical/gunicorn-k8s-operator

You can use the environments created by tox for development:

tox --notest -e unit
source .tox/unit/bin/activate

Testing

tox -e fmt           # update your code according to linting rules
tox -e lint          # code style
tox -e unit          # unit tests
# integration tests (see below for building docker images)
tox -e integration -- --gunicorn-image localhost:32000/gunicorn:latest --statsd-prometheus-exporter-image prom/statsd-exporter
tox                  # runs 'lint' and 'unit' environments

Build charm

Build the charm in this git repository using:

charmcraft pack

For the integration tests (and also to deploy the charm locally), the gunicorn image is required in the microk8s registry. To enable it:

microk8s enable registry

The following command pushes the required image into the registry:

docker build . -t localhost:32000/gunicorn:latest -f gunicorn.Dockerfile
docker push localhost:32000/gunicorn:latest

Deploy

# Create a model
juju add-model gunicorn-dev
# Enable DEBUG logging
juju model-config logging-config="<root>=INFO;unit=DEBUG"
# Deploy the charm (Assuming you're on amd64)
juju deploy ./gunicorn-k8s_ubuntu-20.04-amd64.charm --resource gunicorn-image='localhost:32000/gunicorn:latest' --resource statsd-prometheus-exporter-image='prom/statsd-exporter'

Canonical contributor agreement

Canonical welcomes contributions to the Indico Operator. Please check out our contributor agreement if you’re interested in contributing to the solution.