test-metallb-helm-chart.yml

name: Test MetalLB Helm Chart

on:
  pull_request:
    paths:
      - '**/assets/metallb/**'  # Adjust the path based on your Helm chart structure

jobs:
  test-metallb-helm-chart:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout Repository
      uses: actions/checkout@v3

    - name: Get changed files
      id: changed-files
      uses: tj-actions/changed-files@v39
        
    - name: Verify and copy metallb assets 
      run: |
        archive=$(echo "${{ steps.changed-files.outputs.all_changed_files }}" | tr -s " " "\012" | grep assets/metallb/)
        
        # Count the number of files in the array
        num_files=$(echo "${archive}" | wc -l)
        # Check if there is only one file
        if [ "${num_files}" -gt 1 ]; then
          echo "Multiple archives modified - please modify only a single chart release per PR:"
          for file in "$archive"; do
            echo "${file}"
          done
          exit 1  # Fail the workflow
        fi
        
        mkdir helm-charts
        tar xvzf "${archive}" -C helm-charts/

    - name: Install K3s
      run: |
        curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC="server --cluster-init --write-kubeconfig-mode=644 --disable=servicelb --disable=traefik" K3S_TOKEN=foobar sh -

    - name: Install Helm
      run: |
        curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3
        chmod +x get_helm.sh
        ./get_helm.sh
        
    - name: Deploy metallb Helm chart
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
        helm install metallb helm-charts/metallb
        
    - name: Wait for all metallb pods to become ready
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
        
        # Set a timeout of 5 minutes
        timeout=$((SECONDS + 300))
        
        while [ $SECONDS -lt $timeout ]; do
            # Run the kubectl command to get pod information
            kubectl_output=$(kubectl -n default get po | tail -n +2)
        
            # Flag to track whether all pods are ready
            all_pods_ready=true
        
            # Iterate over each line in the kubectl output
            while IFS= read -r line; do
                # Extract the pod name and the readiness status
                pod_name=$(echo "$line" | awk '{print $1}')
                readiness_status=$(echo "$line" | awk '{print $2}')
        
                # Extract the desired and running replicas from the readiness status
                desired_replicas=$(echo "$readiness_status" | awk -F'/' '{print $1}')
                running_replicas=$(echo "$readiness_status" | awk -F'/' '{print $2}')
        
                # Check if the digit before / is the same as the one after /
                if [ "$desired_replicas" -eq "$running_replicas" ]; then
                    echo "$pod_name is ready"
                else
                    echo "$pod_name is not ready"
                    all_pods_ready=false
                fi
            done <<< "$kubectl_output"
        
            # Check if all pods are ready
            if [ "$all_pods_ready" = true ]; then
                echo "All pods are ready"
                exit 0
            fi
        
            # Wait for a moment before checking again
            sleep 5
        done
        
        # If the loop completes, it means the timeout occurred
        echo "Timeout: Not all pods are ready in 5 minutes."
        exit 1

    - name: Define IPAddressPool
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml

        cat <<-EOF | kubectl apply -f -
        apiVersion: metallb.io/v1beta1
        kind: IPAddressPool
        metadata:
          name: ip-pool
        spec:
          addresses:
          - 192.0.2.1/32
        EOF

        cat <<-EOF | kubectl apply -f -
        apiVersion: metallb.io/v1beta1
        kind: L2Advertisement
        metadata:
          name: ip-pool-l2-adv
        spec:
          ipAddressPools:
          - ip-pool
        EOF

    - name: Define Kubernetes Service
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml

        cat <<-EOF | kubectl apply -f -
        apiVersion: v1
        kind: Service
        metadata:
          name: example-service
        spec:
          selector:
            app: example-app
          ports:
            - protocol: TCP
              port: 80
              targetPort: 8080
          type: LoadBalancer
        EOF

    - name: Verify externalIP of the Service
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
        
        # Sleep for 30 seconds in order to give enough time to the operator
        sleep 30
        
        expected_service_ip="192.0.2.1" # TEST-NET-1
        actual_service_ip=$(kubectl get svc example-service -o yaml -o jsonpath='{.status.loadBalancer.ingress[0].ip}')

        if [ "$expected_service_ip" != "$actual_service_ip" ]; then
          echo "Error: The external IP addresses of the Service do not match. expected_service_ip: $expected_service_ip, actual_service_ip: $actual_service_ip"
          exit 1
        fi

    - name: Uninstall Helm chart
      run: |
        export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
        helm uninstall metallb

    - name: Uninstall K3s
      run: |
        /usr/local/bin/k3s-uninstall.sh