fix: Avoid duplicate volume and mount name error for generic ephemeral volume as "work" (#1471)

* fix: Avoid duplicate volume and mount name error for generic ephemeral volume as "work"

While manually testing configurations being documented in #1464, I discovered that the use of dynamic ephemeral volume for "work" directory was not working correctly due to the valiadation error.

This fixes the runner pod generation logic to not add the default volume and volume mount for "work" dir, so that the error disappears.

Ref #1464

* e2e: Ensure work generic ephemeral volume to work as expected

controllers/runner_controller.go

@@ -741,13 +741,18 @@ func newRunnerPod(runnerName string, template corev1.Pod, runnerSpec v1alpha1.Ru
 			)
 		}
 
-		pod.Spec.Volumes = append(pod.Spec.Volumes,
-			corev1.Volume{
-				Name: "work",
-				VolumeSource: corev1.VolumeSource{
-					EmptyDir: &corev1.EmptyDirVolumeSource{},
+		if ok, _ := workVolumePresent(pod.Spec.Volumes); !ok {
+			pod.Spec.Volumes = append(pod.Spec.Volumes,
+				corev1.Volume{
+					Name: "work",
+					VolumeSource: corev1.VolumeSource{
+						EmptyDir: &corev1.EmptyDirVolumeSource{},
+					},
 				},
-			},
+			)
+		}
+
+		pod.Spec.Volumes = append(pod.Spec.Volumes,
 			corev1.Volume{
 				Name: "certs-client",
 				VolumeSource: corev1.VolumeSource{
@@ -756,11 +761,16 @@ func newRunnerPod(runnerName string, template corev1.Pod, runnerSpec v1alpha1.Ru
 			},
 		)
 
+		if ok, _ := workVolumeMountPresent(runnerContainer.VolumeMounts); !ok {
+			runnerContainer.VolumeMounts = append(runnerContainer.VolumeMounts,
+				corev1.VolumeMount{
+					Name:      "work",
+					MountPath: workDir,
+				},
+			)
+		}
+
 		runnerContainer.VolumeMounts = append(runnerContainer.VolumeMounts,
-			corev1.VolumeMount{
-				Name:      "work",
-				MountPath: workDir,
-			},
 			corev1.VolumeMount{
 				Name:      "certs-client",
 				MountPath: "/certs/client",