fix: terminate workflow should not get throttled Fixes #12778 (#12792)

Signed-off-by: Tianchu Zhao <evantczhao@gmail.com>

workflow/controller/controller.go

@@ -753,7 +753,7 @@ func (wfc *WorkflowController) processNextItem(ctx context.Context) bool {
 
 	woc := newWorkflowOperationCtx(wf, wfc)
 
-	if !wfc.throttler.Admit(key.(string)) {
+	if !(woc.GetShutdownStrategy().Enabled() && woc.GetShutdownStrategy() == wfv1.ShutdownStrategyTerminate) && !wfc.throttler.Admit(key.(string)) {
 		log.WithField("key", key).Info("Workflow processing has been postponed due to max parallelism limit")
 		if woc.wf.Status.Phase == wfv1.WorkflowUnknown {
 			woc.markWorkflowPhase(ctx, wfv1.WorkflowPending, "Workflow processing has been postponed because too many workflows are already running")

workflow/controller/controller_test.go

@@ -659,13 +659,25 @@ spec:
     - name: main
       container:
         image: my-image
+`),
+				wfv1.MustUnmarshalWorkflow(`
+metadata:
+  name: my-wf-2
+spec:
+  shutdown: Terminate
+  entrypoint: main
+  templates:
+    - name: main
+      container:
+        image: my-image
 `),
 				f,
 			)
 			defer cancel()
 			ctx := context.Background()
 			assert.True(t, controller.processNextItem(ctx))
 			assert.True(t, controller.processNextItem(ctx))
+			assert.True(t, controller.processNextItem(ctx))
 
 			expectWorkflow(ctx, controller, "my-wf-0", func(wf *wfv1.Workflow) {
 				if assert.NotNil(t, wf) {
@@ -678,6 +690,11 @@ spec:
 					assert.Equal(t, "Workflow processing has been postponed because too many workflows are already running", wf.Status.Message)
 				}
 			})
+			expectWorkflow(ctx, controller, "my-wf-2", func(wf *wfv1.Workflow) {
+				if assert.NotNil(t, wf) {
+					assert.Equal(t, wfv1.WorkflowSucceeded, wf.Status.Phase)
+				}
+			})
 		})
 	}
 }
@@ -1132,6 +1149,25 @@ spec:
 	assert.Len(t, pods.Items, 0)
 }
 
+func TestPendingPodWhenTerminate(t *testing.T) {
+	wf := wfv1.MustUnmarshalWorkflow(helloWorldWf)
+	wf.Spec.Shutdown = wfv1.ShutdownStrategyTerminate
+	wf.Status.Phase = wfv1.WorkflowPending
+
+	cancel, controller := newController(wf)
+	defer cancel()
+
+	ctx := context.Background()
+	assert.True(t, controller.processNextItem(ctx))
+
+	woc := newWorkflowOperationCtx(wf, controller)
+	woc.operate(ctx)
+	assert.Equal(t, wfv1.WorkflowSucceeded, woc.wf.Status.Phase)
+	for _, node := range woc.wf.Status.Nodes {
+		assert.Equal(t, wfv1.NodeSkipped, node.Phase)
+	}
+}
+
 func TestWorkflowReferItselfFromExpression(t *testing.T) {
 	wf := wfv1.MustUnmarshalWorkflow(fromExrpessingWf)
 	cancel, controller := newController(wf)