Allow to configure runner volume size limit (#436)

Enable the user to set a limit size on the volume of the runner to avoid some runner pod affecting other resources of the same cluster

Co-authored-by: Yusuke Kuoka <ykuoka@gmail.com>

controllers/runner_controller.go

@@ -644,12 +644,17 @@ func (r *RunnerReconciler) newPod(runner v1alpha1.Runner) (corev1.Pod, error) {
 
 	runnerVolumeName := "runner"
 	runnerVolumeMountPath := "/runner"
+	runnerVolumeEmptyDir := &corev1.EmptyDirVolumeSource{}
+
+	if runner.Spec.VolumeSizeLimit != nil {
+		runnerVolumeEmptyDir.SizeLimit = runner.Spec.VolumeSizeLimit
+	}
 
 	pod.Spec.Volumes = append(pod.Spec.Volumes,
 		corev1.Volume{
 			Name: runnerVolumeName,
 			VolumeSource: corev1.VolumeSource{
-				EmptyDir: &corev1.EmptyDirVolumeSource{},
+				EmptyDir: runnerVolumeEmptyDir,
 			},
 		},
 	)