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CONTRIBUTING.md

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Contributing Guidelines

Thank you for showing interest in contributing to Kong Ingress Controller.

Following guide will help you navigate the repository and get your PRs merged in faster.

Finding work

If you're new to the project and want to help, but don't know where to start, look for "Help wanted" or "Good first issue" labels in our issue tracker. Alternatively, read our documentation and fix or improve any issues that you see. We really value documentation contributions since that makes life easier for a lot of people.

All of the following tasks are noble and worthy contributions that you can make without coding:

  • Reporting a bug
  • Helping other members of the community on the support channels
  • Fixing a typo in the code
  • Fixing a typo in the documentation
  • Providing your feedback on the proposed features and designs
  • Reviewing Pull Requests

If you wish to contribute code (features or bug fixes), see the Submitting a patch section.

Development environment

Environment

  • Golang version >= 1.12 installed
  • Access to a k8s cluster, you can use Minikube or GKE
  • make
  • Docker (for building)

Dependencies

The build uses dependencies are managed by go modules

Running in dev mode

You can run the ingress controller without building a Docker Image and installing it onto your docker container.

Following is a helpful shell script that you could use to run the Ingress Controller without building the Ingress Controller:

#!/bin/bash
pkill -f kubectl
# setup proxies
kubectl port-forward svc/kong-proxy -n kong 8443:443 2>&1 > /dev/null &
kubectl port-forward svc/kong-proxy -n kong 8000:80 2>&1 > /dev/null &
kubectl port-forward svc/kong-ingress-controller -n kong 8001:8001 2>&1 > /dev/null &
kubectl proxy --port=8002 2>&1 > /dev/null &

export POD_NAME=`kubectl get po -n kong -o json | jq ".items[] | .metadata.name" -r | grep ingress`
export POD_NAMESPACE=kong

go run -tags gcp ./cli/ingress-controller/ \
--default-backend-service kong/kong-proxy \
--kubeconfig ~/.kube/config \
--publish-service=kong/kong-proxy \
--apiserver-host=http://localhost:8002 \
--kong-url http://localhost:8001

Building

Build is performed via Makefile. Depending on your requirements you can build a raw server binary, a local container image, or push an image to a remote repository.

Build a raw server binary

$ make build

Build a local container image

$ TAG=DEV make docker-build

Note: this will use the Docker daemon running on your system. If you're developing using minikube, you should execute the following to use the Docker daemon running inside the Minikube VM:

eval $(minikube docker-env)

This will allow you to publish images to Minikube VM, allowing you to reference them in your Deployment specs.

Push the container image to a remote repository

$ TAG=DEV REGISTRY=$USER/kong-ingress-controller make docker-push

Deploying

There are several ways to deploy Kong Ingress Controller onto a cluster. Please check the deployment guide

Testing

To run unit-tests, just run

$ cd $GOPATH/src/github.com/kong/kubernetes-ingress-controller
$ make test

Releasing

Makefile will produce a release binary, as shown above. To publish this to a wider Kubernetes user base, push the image to a container registry. Our images are hosted on Bintray.

An example release might look like:

$ export TAG=42
$ make release

Please follow these guidelines to cut a release:

  • Update the release page with a link to changelog.
  • Cut a release branch, if appropriate. All major feature work is done in HEAD. Specific bug fixes are cherry-picked into a release branch.
  • If you're not confident about the stability of the code, tag it as alpha or beta. Typically, a release branch should have stable code.