Setup minikube as CI step in github actions

How to use minikube in github actions for testing your app

To install and start a minikube cluster, add the following step to your github action workflow.

    steps:
    - name: start minikube
      id: minikube
      uses: medyagh/setup-minikube@master

for more information see github actions marketplace setup-minikube.

Example: build image & deploy to minikube on each PR

Requirements:

• a valid Dockerfile
• a valid deployment.yaml file with imagePullPolicy: Never see below for an example

Create workflow:

• copy this yaml to your workflow file for example in .github/workflows/pr.yml:

  name: CI
  on:
    - pull_request
  jobs:
    job1:
      runs-on: ubuntu-latest
      name: build example and deploy to minikube
      steps:
      - uses: actions/checkout@v2
      - name: Start minikube
        uses: medyagh/setup-minikube@master
      - name: Try the cluster !
        run: kubectl get pods -A
      - name: Build image
        run: |
          export SHELL=/bin/bash
          eval $(minikube -p minikube docker-env)
          docker build -f ./Dockerfile -t local/example .
          echo -n "verifying images:"
          docker images        
      - name: Deploy to minikube
        run:
          kubectl apply -f deploy-to-minikube.yaml
      - name: Test service URLs
        run: |
          minikube service list
          minikube service example --url
          echo "------------------opening the service------------------"
          curl $(minikube service example --url)

The above example workflow yaml, will do the following steps on each coming PR:

1. Checks out the the source code
2. Installs & starts minikube
3. Tries out the cluster just by running kubectl command
4. Build the docker image using minikube’s docker-env feature
5. Apply the deployment yaml file minikube
6. Check the service been created in minikube

Example minikube deployment yaml with a service

apiVersion: apps/v1
kind: Deployment
metadata:
    name: example
spec:
    selector:
        matchLabels:
            app: example
    replicas: 2
    template:
        metadata:
            labels:
                app: example
        spec:
            containers:
                - name: example-api
                  imagePullPolicy: Never
                  image: local/example:latest
                  resources:
                      limits:
                          cpu: 50m
                          memory: 100Mi
                      requests:
                          cpu: 25m
                          memory: 10Mi
                  ports:
                      - containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
    name: example
spec:
    type: NodePort
    selector:
        app: example
    ports:
        - port: 8080
          targetPort: 8080

Last modified November 14, 2020: Fix whitespace issues in the site content markdown (ebf37ad15)