add omitempty to Secret in k8s VolumeSource

Secret was populating a generated kube as `null`. Add omitempty
so that when the volume source is not a secret, we do not print unnecessary info

resolves #15156

Signed-off-by: Charlie Doern <cdoern@redhat.com>

2 files changed, 25 insertions, 1 deletions

diff --git a/pkg/k8s.io/api/core/v1/types.go b/pkg/k8s.io/api/core/v1/types.go
index 39a675dae..384965769 100644
--- a/pkg/k8s.io/api/core/v1/types.go
+++ b/pkg/k8s.io/api/core/v1/types.go
@@ -56,7 +56,8 @@ type VolumeSource struct {
 	// ConfigMap represents a configMap that should populate this volume
 	// +optional
 	ConfigMap *ConfigMapVolumeSource `json:"configMap,omitempty"`
-	Secret    *SecretVolumeSource
+	// Secret represents a secret that should be mounted as a volume
+	Secret *SecretVolumeSource `json:"secret,omitempty"`
 }
 
 // PersistentVolumeClaimVolumeSource references the user's PVC in the same namespace.
diff --git a/test/e2e/generate_kube_test.go b/test/e2e/generate_kube_test.go
index 845aa60ce..5e9881c4f 100644
--- a/test/e2e/generate_kube_test.go
+++ b/test/e2e/generate_kube_test.go
@@ -1228,4 +1228,27 @@ USER test1`
 
 		Expect(pod.Spec.Containers[0].Env).To(HaveLen(2))
 	})
+
+	It("podman generate kube omit secret if empty", func() {
+		dir, err := os.MkdirTemp(tempdir, "podman")
+		Expect(err).Should(BeNil())
+
+		defer os.RemoveAll(dir)
+
+		podCreate := podmanTest.Podman([]string{"run", "-d", "--pod", "new:" + "noSecretsPod", "--name", "noSecretsCtr", "--volume", dir + ":/foobar", ALPINE})
+		podCreate.WaitWithDefaultTimeout()
+		Expect(podCreate).Should(Exit(0))
+
+		kube := podmanTest.Podman([]string{"generate", "kube", "noSecretsPod"})
+		kube.WaitWithDefaultTimeout()
+		Expect(kube).Should(Exit(0))
+
+		Expect(kube.OutputToString()).ShouldNot(ContainSubstring("secret"))
+
+		pod := new(v1.Pod)
+		err = yaml.Unmarshal(kube.Out.Contents(), pod)
+		Expect(err).To(BeNil())
+
+		Expect(pod.Spec.Volumes[0].Secret).To(BeNil())
+	})
 })