k3s on Github Actions

A GitHub Action for running k3s kubernetes cluster

How it works

Action is by itself a docker container with docker and kubectl installed
Action is launching k3s container and some checks to ensure kubernetes is up and running
Optionally (by default, but can be turned off) installs kubectl (copies over) to enable hassle-free k8s interaction

Optional Input parameters

k3s_tag - k3s tag to use. (can be found at https://hub.docker.com/r/rancher/k3s/tags)
registries_yaml_path - relative path of registries.yaml
kubectl_version
install_kubectl - enabled by default, copies kubectl to bin dir in workspace to allow other steps to use kubectl
k3s_arguments - by default set to --no-deploy=traefik

Required parameters

custom_registry - set to 'true' to mount your registries.yaml to k3s. This will allow to use private registry mapping in k3s. (set to false if you don't have such needs)

GitHub Actions

# File: .github/workflows/ci.yml
name: k3s
on:
  push:
    branches:
      - master
  pull_request:
env:
  KUBECONFIG: k3s.yaml
jobs:
  k3s:
    name: k3s
    runs-on: ubuntu-latest
    steps:
      - name: checkout code
        uses: actions/checkout@master
      - name: k3s
        uses: yellowmegaman/k3s-gha@master
        with:
          custom_registry: true
      - name: try to use kubeconfig
        run: kubectl get ns

This will result in something similar:

Run kubectl get ns
NAME              STATUS   AGE
default           Active   52s
kube-system       Active   51s
kube-public       Active   51s
kube-node-lease   Active   51s