optimize code, filter podUID is empty string

Signed-off-by: rongfu.leng <lenronfu@gmail.com>

pkg/kubelet/cm/devicemanager/manager.go

@@ -280,16 +280,20 @@ func (m *ManagerImpl) genericDeviceUpdateCallback(resourceName string, devices [
 
 		if utilfeature.DefaultFeatureGate.Enabled(features.ResourceHealthStatus) {
 			// compare with old device's health and send update to the channel if needed
+			updatePodUIDFn := func(deviceID string) {
+				podUID, _ := m.podDevices.getPodAndContainerForDevice(deviceID)
+				if podUID != "" {
+					podsToUpdate.Insert(podUID)
+				}
+			}
 			if oldDev, ok := oldDevices[dev.ID]; ok {
 				if oldDev.Health != dev.Health {
-					podUID, _ := m.podDevices.getPodAndContainerForDevice(dev.ID)
-					podsToUpdate.Insert(podUID)
+					updatePodUIDFn(dev.ID)
 				}
 			} else {
 				// if this is a new device, it might have existed before and disappeared for a while
 				// but still be assigned to a Pod. In this case, we need to send an update to the channel
-				podUID, _ := m.podDevices.getPodAndContainerForDevice(dev.ID)
-				podsToUpdate.Insert(podUID)
+				updatePodUIDFn(dev.ID)
 			}
 		}
 

pkg/kubelet/cm/devicemanager/manager_test.go

@@ -38,13 +38,17 @@ import (
 	"k8s.io/apimachinery/pkg/util/sets"
 	"k8s.io/apimachinery/pkg/util/uuid"
 	"k8s.io/apimachinery/pkg/util/wait"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
 	"k8s.io/client-go/tools/record"
+	featuregatetesting "k8s.io/component-base/featuregate/testing"
 	pluginapi "k8s.io/kubelet/pkg/apis/deviceplugin/v1beta1"
 	watcherapi "k8s.io/kubelet/pkg/apis/pluginregistration/v1"
+	"k8s.io/kubernetes/pkg/features"
 	"k8s.io/kubernetes/pkg/kubelet/checkpointmanager"
 	"k8s.io/kubernetes/pkg/kubelet/cm/containermap"
 	"k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/checkpoint"
 	plugin "k8s.io/kubernetes/pkg/kubelet/cm/devicemanager/plugin/v1beta1"
+	"k8s.io/kubernetes/pkg/kubelet/cm/resourceupdates"
 	"k8s.io/kubernetes/pkg/kubelet/cm/topologymanager"
 	"k8s.io/kubernetes/pkg/kubelet/cm/topologymanager/bitmask"
 	"k8s.io/kubernetes/pkg/kubelet/config"
@@ -1953,3 +1957,76 @@ func sortContainerStatuses(statuses []v1.ContainerStatus) {
 		}
 	}
 }
+
+func TestFeatureGateResourceHealthStatus(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "checkpoint")
+	require.NoError(t, err, "err should be nil")
+	defer func() {
+		err = os.RemoveAll(tmpDir)
+		if err != nil {
+			t.Fatalf("Fail to remove tmpdir: %v", err)
+		}
+	}()
+	ckm, err := checkpointmanager.NewCheckpointManager(tmpDir)
+	require.NoError(t, err, "err should be nil")
+	resourceName := "domain1.com/resource1"
+	existDevices := map[string]DeviceInstances{
+		resourceName: map[string]pluginapi.Device{
+			"dev1": {
+				ID:     "dev1",
+				Health: pluginapi.Healthy,
+			},
+			"dev2": {
+				ID:     "dev2",
+				Health: pluginapi.Unhealthy,
+			},
+		},
+	}
+	testManager := &ManagerImpl{
+		allDevices:        ResourceDeviceInstances(existDevices),
+		endpoints:         make(map[string]endpointInfo),
+		healthyDevices:    make(map[string]sets.Set[string]),
+		unhealthyDevices:  make(map[string]sets.Set[string]),
+		allocatedDevices:  make(map[string]sets.Set[string]),
+		podDevices:        newPodDevices(),
+		checkpointManager: ckm,
+		update:            make(chan resourceupdates.Update),
+	}
+
+	podID := "pod1"
+	contID := "con1"
+	devices := checkpoint.DevicesPerNUMA{0: []string{"dev1"}, 1: []string{"dev1"}}
+
+	testManager.podDevices.insert(podID, contID, resourceName,
+		devices,
+		newContainerAllocateResponse(
+			withDevices(map[string]string{"/dev/r1dev1": "/dev/r1dev1", "/dev/r1dev2": "/dev/r1dev2"}),
+			withMounts(map[string]string{"/home/r1lib1": "/usr/r1lib1"}),
+		),
+	)
+	featuregatetesting.SetFeatureGateDuringTest(t, utilfeature.DefaultFeatureGate, features.ResourceHealthStatus, true)
+
+	testManager.genericDeviceUpdateCallback(resourceName, []pluginapi.Device{
+		{ID: "dev1", Health: pluginapi.Healthy},
+		{ID: "dev2", Health: pluginapi.Unhealthy},
+	})
+	// update chan no data
+	assert.Empty(t, len(testManager.update), 0)
+
+	// update chan receive pod1
+	var wg sync.WaitGroup
+	go func() {
+		defer wg.Done()
+		u := <-testManager.update
+		assert.Equal(t, resourceupdates.Update{
+			PodUIDs: []string{"pod1"},
+		}, u)
+	}()
+	wg.Add(1)
+	testManager.genericDeviceUpdateCallback(resourceName, []pluginapi.Device{
+		{ID: "dev1", Health: pluginapi.Unhealthy},
+		{ID: "dev2", Health: pluginapi.Healthy},
+	})
+	wg.Wait()
+
+}

pkg/kubelet/cm/devicemanager/pod_devices_test.go

@@ -251,3 +251,27 @@ func TestDeviceRunContainerOptions(t *testing.T) {
 		})
 	}
 }
+
+func TestGetPodAndContainerForDevice(t *testing.T) {
+	podDevices := newPodDevices()
+	resourceName1 := "domain1.com/resource1"
+	podID := "pod1"
+	contID := "con1"
+	devices := checkpoint.DevicesPerNUMA{0: []string{"dev1"}, 1: []string{"dev1"}}
+
+	podDevices.insert(podID, contID, resourceName1,
+		devices,
+		newContainerAllocateResponse(
+			withDevices(map[string]string{"/dev/r1dev1": "/dev/r1dev1", "/dev/r1dev2": "/dev/r1dev2"}),
+			withMounts(map[string]string{"/home/r1lib1": "/usr/r1lib1"}),
+		),
+	)
+
+	// dev2 is a new device
+	podUID, _ := podDevices.getPodAndContainerForDevice("dev2")
+	assert.Equal(t, "", podUID)
+
+	// dev1 is a exist device
+	podUID, _ = podDevices.getPodAndContainerForDevice("dev1")
+	assert.Equal(t, "pod1", podUID)
+}