Only update osc pod when pod spec changes

controllers/client/openstackclient_controller.go

@@ -307,17 +307,23 @@ func (r *OpenStackClientReconciler) Reconcile(ctx context.Context, req ctrl.Requ
 
 	spec := openstackclient.ClientPodSpec(ctx, instance, helper, configVarsHash)
 
+	podTemplateHash, err := util.ObjectHash(spec)
+	if err != nil {
+		return ctrl.Result{}, err
+	}
+
 	op, err := controllerutil.CreateOrPatch(ctx, r.Client, osclient, func() error {
 		isPodUpdate := !osclient.ObjectMeta.CreationTimestamp.IsZero()
 		if !isPodUpdate {
 			osclient.Spec = spec
-		} else {
+		} else if osclient.Annotations["pod-spec-hash"] != podTemplateHash {
 			osclient.Spec.Containers[0].Env = spec.Containers[0].Env
 			osclient.Spec.NodeSelector = spec.NodeSelector
 			osclient.Spec.Containers[0].Image = instance.Spec.ContainerImage
 		}
 
 		osclient.Labels = util.MergeStringMaps(osclient.Labels, clientLabels)
+		osclient.Annotations = util.MergeStringMaps(map[string]string{"pod-spec-hash": podTemplateHash}, osclient.Annotations)
 
 		err = controllerutil.SetControllerReference(instance, osclient, r.Scheme)
 		if err != nil {