Add OwnerReference to generated Jobs

internal/pkg/callbacks/rolling_upgrade.go

@@ -16,6 +16,8 @@ import (
 	"k8s.io/apimachinery/pkg/runtime"
 	patchtypes "k8s.io/apimachinery/pkg/types"
 
+	"maps"
+
 	argorolloutv1alpha1 "github.com/argoproj/argo-rollouts/pkg/apis/rollouts/v1alpha1"
 )
 
@@ -443,11 +445,21 @@ func PatchDeployment(clients kube.Clients, namespace string, resource runtime.Ob
 // CreateJobFromCronjob performs rolling upgrade on cronjob
 func CreateJobFromCronjob(clients kube.Clients, namespace string, resource runtime.Object) error {
 	cronJob := resource.(*batchv1.CronJob)
+
+	annotations := make(map[string]string)
+	annotations["cronjob.kubernetes.io/instantiate"] = "manual"
+	maps.Copy(annotations, cronJob.Spec.JobTemplate.Annotations)
+
 	job := &batchv1.Job{
-		ObjectMeta: cronJob.Spec.JobTemplate.ObjectMeta,
-		Spec:       cronJob.Spec.JobTemplate.Spec,
+		ObjectMeta: meta_v1.ObjectMeta{
+			GenerateName:    cronJob.Name + "-",
+			Namespace:       cronJob.Namespace,
+			Annotations:     annotations,
+			Labels:          cronJob.Spec.JobTemplate.Labels,
+			OwnerReferences: []meta_v1.OwnerReference{*meta_v1.NewControllerRef(cronJob, batchv1.SchemeGroupVersion.WithKind("CronJob"))},
+		},
+		Spec: cronJob.Spec.JobTemplate.Spec,
 	}
-	job.GenerateName = cronJob.Name + "-"
 	_, err := clients.KubernetesClient.BatchV1().Jobs(namespace).Create(context.TODO(), job, meta_v1.CreateOptions{FieldManager: "Reloader"})
 	return err
 }

internal/pkg/callbacks/rolling_upgrade_test.go

@@ -415,13 +415,26 @@ func TestPatchResources(t *testing.T) {
 func TestCreateJobFromCronjob(t *testing.T) {
 	fixtures := newTestFixtures()
 
-	cronJob, err := createTestCronJobWithAnnotations(clients, fixtures.namespace, "1")
+	runtimeObj, err := createTestCronJobWithAnnotations(clients, fixtures.namespace, "1")
 	assert.NoError(t, err)
 
-	err = callbacks.CreateJobFromCronjob(clients, fixtures.namespace, cronJob.(*batchv1.CronJob))
+	cronJob := runtimeObj.(*batchv1.CronJob)
+	err = callbacks.CreateJobFromCronjob(clients, fixtures.namespace, cronJob)
 	assert.NoError(t, err)
 
-	err = deleteTestCronJob(clients, fixtures.namespace, "test-cronjob")
+	jobList, err := clients.KubernetesClient.BatchV1().Jobs(fixtures.namespace).List(context.TODO(), metav1.ListOptions{})
+	assert.NoError(t, err)
+
+	ownerFound := false
+	for _, job := range jobList.Items {
+		if isControllerOwner("CronJob", cronJob.Name, job.OwnerReferences) {
+			ownerFound = true
+			break
+		}
+	}
+	assert.Truef(t, ownerFound, "Missing CronJob owner reference")
+
+	err = deleteTestCronJob(clients, fixtures.namespace, cronJob.Name)
 	assert.NoError(t, err)
 }
 
@@ -749,3 +762,12 @@ func createTestJobWithAnnotations(clients kube.Clients, namespace, version strin
 func deleteTestJob(clients kube.Clients, namespace, name string) error {
 	return clients.KubernetesClient.BatchV1().Jobs(namespace).Delete(context.TODO(), name, metav1.DeleteOptions{})
 }
+
+func isControllerOwner(kind, name string, ownerRefs []metav1.OwnerReference) bool {
+	for _, ownerRef := range ownerRefs {
+		if *ownerRef.Controller && ownerRef.Kind == kind && ownerRef.Name == name {
+			return true
+		}
+	}
+	return false
+}