feat(): increased test coverage and added simple workflow to build OCI image

.gitea/workflows/main.yaml

@@ -0,0 +1,79 @@
+name: Build and Test
+run-name: Reference Branch Build 🚀
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  Test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v5
+      - name: Setup Go
+        uses: actions/setup-go@v6
+        with:
+          go-version: '1.25.x'
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v8
+        with:
+          version: v2.1
+      - name: Test with the Go CLI
+        run: go test ./... -v
+      - name: Run Gosec Security Scanner
+        uses: securego/gosec@master
+        with:
+          args: ./...
+  Build_Image_amd64:
+    runs-on: ubuntu-latest-amd64
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v5
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver: remote
+          endpoint: tcp://buildkit-service.buildkit-service.svc:1234
+      - name: Log in to Gitea OCI
+        uses: docker/login-action@v2
+        with:
+          registry: git.uploadfilter24.eu
+          username: ${{ vars.GA_USER }}
+          password: ${{ secrets.GA_PAT }}
+      - name: Build and Push the Docker Image
+        uses: docker/build-push-action@v6
+        id: build-and-push
+        with:
+            platforms: linux/amd64
+            context: .
+            file: ./Dockerfile
+            push: true
+            tags: |
+              git.uploadfilter24.eu/covidnetes/${{ github.event.repository.name }}:${{ github.sha }}
+  Build_Image_arm64:
+    runs-on: ubuntu-latest-arm64
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v5
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          driver: remote
+          endpoint: tcp://buildkit-service.buildkit-service.svc:1234
+      - name: Log in to Gitea OCI
+        uses: docker/login-action@v2
+        with:
+          registry: git.uploadfilter24.eu
+          username: ${{ vars.GA_USER }}
+          password: ${{ secrets.GA_PAT }}
+      - name: Build and Push the Docker Image
+        uses: docker/build-push-action@v6
+        id: build-and-push
+        with:
+            platforms: linux/arm64
+            context: .
+            file: ./Dockerfile
+            push: true
+            tags: |
+              git.uploadfilter24.eu/covidnetes/${{ github.event.repository.name }}:${{ github.sha }}

README.md

@@ -83,13 +83,6 @@ roleRef:
 go test ./...
 ```
 
-## Next steps / TODOs
-
-- Add CI/CD gitea workflows.
-- Add Helm Chart for easy deployment.
-- Add integration tests that run against a kind cluster to validate in-cluster behaviour.
-- Add a long-running informer with event handlers to react to lease changes instead of polling.
-
 ## License
 
 - See the `LICENSE` file in this repository.

internal/informer_test.go

@@ -0,0 +1,35 @@
+package internal
+
+import (
+	"testing"
+
+	coordv1 "k8s.io/api/coordination/v1"
+)
+
+func TestHandleLease_DryRun(t *testing.T) {
+	l := &coordv1.Lease{}
+	l.Name = "cilium-l2announce-abc"
+	hi := "xx-yy-node-a"
+	l.Spec.HolderIdentity = &hi
+
+	cfg := &Config{CiliumLabel: "lbl", DryRun: true}
+
+	handleLease(l, cfg)
+}
+
+func TestHandleLease_NonCilium(t *testing.T) {
+	l := &coordv1.Lease{}
+	l.Name = "other-lease"
+	hi := "xx-yy-node-a"
+	l.Spec.HolderIdentity = &hi
+
+	cfg := &Config{CiliumLabel: "lbl", DryRun: true}
+	handleLease(l, cfg)
+}
+
+func TestHandleLease_NoHolderIdentity(t *testing.T) {
+	l := &coordv1.Lease{}
+	l.Name = "cilium-l2announce-123"
+	cfg := &Config{CiliumLabel: "lbl", DryRun: true}
+	handleLease(l, cfg)
+}

internal/kube.go

@@ -28,14 +28,18 @@ func generateClient() (kubernetes.Clientset, error) {
 }
 
 func LabelNode(nodeName string, leaseName string, cfg *Config) error {
-
 	client, err := generateClient()
 	if err != nil {
 		return fmt.Errorf("Could not generate client: %s", err.Error())
 	}
 
+	return ApplyLabelToNode(&client, nodeName, leaseName, cfg)
+
+}
+
+func ApplyLabelToNode(client kubernetes.Interface, nodeName string, leaseName string, cfg *Config) error {
 	log.WithFields(log.Fields{
-		"Caller": "LabelNode",
+		"Caller": "ApplyLabelToNode",
 	}).Info(fmt.Sprintf("Trying to label node %s", nodeName))
 
 	node, err := client.CoreV1().Nodes().Get(context.TODO(), nodeName, metav1.GetOptions{})
@@ -56,11 +60,10 @@ func LabelNode(nodeName string, leaseName string, cfg *Config) error {
 	}
 
 	log.WithFields(log.Fields{
-		"Caller": "LabelNode",
+		"Caller": "ApplyLabelToNode",
 	}).Info(fmt.Sprintf("Node %s labeled with %s=%s\n", nodeName, cfg.CiliumLabel, "true"))
 
 	return nil
-
 }
 
 func RemoveLabelFromNode(nodeName string) error {
@@ -92,37 +95,6 @@ func RemoveLabelFromNode(nodeName string) error {
 	return nil
 }
 
-// func GetCiliumL2Leases() ([]v1.Lease, error) {
-// 	client, err := generateClient()
-// 	if err != nil {
-// 		log.WithFields(log.Fields{"Caller": "GetCiliumL2Leases"}).Errorf("Could not generate client: %s", err.Error())
-// 		return nil, err
-// 	}
-
-// 	leases, err := client.CoordinationV1().Leases("kube-system").List(context.TODO(), metav1.ListOptions{})
-// 	if err != nil {
-// 		log.WithFields(log.Fields{"Caller": "GetCiliumL2Leases"}).Errorf("Could not list leases: %s", err.Error())
-// 		return nil, err
-// 	}
-
-// 	ciliumLeases := []v1.Lease{}
-
-// 	for _, l := range leases.Items {
-// 		if strings.HasPrefix(l.Name, "cilium-l2announce") {
-// 			log.WithFields(log.Fields{
-// 				"Caller": "GetCiliumL2Leases",
-// 				"Lease":  l.Name,
-// 			}).Info("Found Cilium L2 lease")
-// 			// Pretty-print a couple of fields for debugging
-// 			if l.Spec.HolderIdentity != nil {
-// 				log.WithFields(log.Fields{"HolderIdentity": *l.Spec.HolderIdentity}).Debug("HolderIdentity")
-// 			}
-// 			ciliumLeases = append(ciliumLeases, l)
-// 		}
-// 	}
-// 	return ciliumLeases, nil
-// }
-
 func GetNodeNameFromLease(lease v1.Lease) (string, error) {
 	if lease.Spec.HolderIdentity == nil {
 		return "", fmt.Errorf("Lease %s has no HolderIdentity", lease.Name)

internal/kube_test.go

@@ -0,0 +1,73 @@
+package internal
+
+import (
+	"context"
+	"testing"
+
+	coordv1 "k8s.io/api/coordination/v1"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/kubernetes/fake"
+)
+
+func TestGetNodeNameFromLease_Valid(t *testing.T) {
+	l := coordv1.Lease{}
+	l.Name = "cilium-l2announce-1"
+	hi := "aa-bb-node1"
+	l.Spec.HolderIdentity = &hi
+
+	node, err := GetNodeNameFromLease(l)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if node != "node1" {
+		t.Fatalf("unexpected node name: got %s", node)
+	}
+}
+
+func TestGetNodeNameFromLease_Invalid(t *testing.T) {
+	l := coordv1.Lease{}
+	l.Name = "cilium-l2announce-2"
+	hi := "too-short"
+	l.Spec.HolderIdentity = &hi
+
+	_, err := GetNodeNameFromLease(l)
+	if err == nil {
+		t.Fatalf("expected error for invalid holder identity")
+	}
+}
+
+func TestApplyLabelToNode_WithFakeClient(t *testing.T) {
+	client := fake.NewSimpleClientset()
+
+	node := &corev1.Node{
+		ObjectMeta: metav1.ObjectMeta{
+			Name:   "test-node",
+			Labels: map[string]string{},
+		},
+	}
+	_, err := client.CoreV1().Nodes().Create(context.TODO(), node, metav1.CreateOptions{})
+	if err != nil {
+		t.Fatalf("failed to create fake node: %v", err)
+	}
+
+	cfg := &Config{CiliumLabel: "mylabel", DryRun: false}
+
+	err = ApplyLabelToNode(client, "test-node", "lease-1", cfg)
+	if err != nil {
+		t.Fatalf("ApplyLabelToNode failed: %v", err)
+	}
+
+	updated, err := client.CoreV1().Nodes().Get(context.TODO(), "test-node", metav1.GetOptions{})
+	if err != nil {
+		t.Fatalf("failed to get node: %v", err)
+	}
+
+	if updated.Labels["mylabel"] != "true" {
+		t.Fatalf("expected label set on node, got: %v", updated.Labels)
+	}
+
+	if updated.Labels["cilium.uploadfilter24.eu/lease"] != "lease-1" {
+		t.Fatalf("expected lease label set on node, got: %v", updated.Labels)
+	}
+}