Allow kubectl set image/env on a cronjob

pkg/kubectl/cmd/util/BUILD

@@ -53,6 +53,7 @@ go_library(
         "//vendor/k8s.io/api/apps/v1beta1:go_default_library",
         "//vendor/k8s.io/api/apps/v1beta2:go_default_library",
         "//vendor/k8s.io/api/batch/v1:go_default_library",
+        "//vendor/k8s.io/api/batch/v1beta1:go_default_library",
         "//vendor/k8s.io/api/batch/v2alpha1:go_default_library",
         "//vendor/k8s.io/api/core/v1:go_default_library",
         "//vendor/k8s.io/api/extensions/v1beta1:go_default_library",

pkg/kubectl/cmd/util/factory_client_access.go

@@ -38,6 +38,7 @@ import (
 	appsv1beta1 "k8s.io/api/apps/v1beta1"
 	appsv1beta2 "k8s.io/api/apps/v1beta2"
 	batchv1 "k8s.io/api/batch/v1"
+	batchv1beta1 "k8s.io/api/batch/v1beta1"
 	batchv2alpha1 "k8s.io/api/batch/v2alpha1"
 	extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
 	apierrors "k8s.io/apimachinery/pkg/api/errors"
@@ -275,6 +276,11 @@ func (f *ring0Factory) UpdatePodSpecForObject(obj runtime.Object, fn func(*v1.Po
 	// Job
 	case *batchv1.Job:
 		return true, fn(&t.Spec.Template.Spec)
+	// CronJob
+	case *batchv1beta1.CronJob:
+		return true, fn(&t.Spec.JobTemplate.Spec.Template.Spec)
+	case *batchv2alpha1.CronJob:
+		return true, fn(&t.Spec.JobTemplate.Spec.Template.Spec)
 	default:
 		return false, fmt.Errorf("the object is not a pod or does not have a pod template")
 	}