rename latency to duration in metrics

pkg/kubelet/cm/cgroup_manager_linux.go

@@ -284,7 +284,7 @@ func (m *cgroupManagerImpl) Exists(name CgroupName) bool {
 func (m *cgroupManagerImpl) Destroy(cgroupConfig *CgroupConfig) error {
 	start := time.Now()
 	defer func() {
-		metrics.CgroupManagerLatency.WithLabelValues("destroy").Observe(metrics.SinceInSeconds(start))
+		metrics.CgroupManagerDuration.WithLabelValues("destroy").Observe(metrics.SinceInSeconds(start))
 		metrics.DeprecatedCgroupManagerLatency.WithLabelValues("destroy").Observe(metrics.SinceInMicroseconds(start))
 	}()
 
@@ -412,7 +412,7 @@ func (m *cgroupManagerImpl) toResources(resourceConfig *ResourceConfig) *libcont
 func (m *cgroupManagerImpl) Update(cgroupConfig *CgroupConfig) error {
 	start := time.Now()
 	defer func() {
-		metrics.CgroupManagerLatency.WithLabelValues("update").Observe(metrics.SinceInSeconds(start))
+		metrics.CgroupManagerDuration.WithLabelValues("update").Observe(metrics.SinceInSeconds(start))
 		metrics.DeprecatedCgroupManagerLatency.WithLabelValues("update").Observe(metrics.SinceInMicroseconds(start))
 	}()
 
@@ -448,7 +448,7 @@ func (m *cgroupManagerImpl) Update(cgroupConfig *CgroupConfig) error {
 func (m *cgroupManagerImpl) Create(cgroupConfig *CgroupConfig) error {
 	start := time.Now()
 	defer func() {
-		metrics.CgroupManagerLatency.WithLabelValues("create").Observe(metrics.SinceInSeconds(start))
+		metrics.CgroupManagerDuration.WithLabelValues("create").Observe(metrics.SinceInSeconds(start))
 		metrics.DeprecatedCgroupManagerLatency.WithLabelValues("create").Observe(metrics.SinceInMicroseconds(start))
 	}()
 

pkg/kubelet/cm/devicemanager/manager.go

@@ -697,7 +697,7 @@ func (m *ManagerImpl) allocateContainerResources(pod *v1.Pod, container *v1.Cont
 		// in a passed in AllocateRequest pointer, and issues a single Allocate call per pod.
 		klog.V(3).Infof("Making allocation request for devices %v for device plugin %s", devs, resource)
 		resp, err := eI.e.allocate(devs)
-		metrics.DevicePluginAllocationLatency.WithLabelValues(resource).Observe(metrics.SinceInSeconds(startRPCTime))
+		metrics.DevicePluginAllocationDuration.WithLabelValues(resource).Observe(metrics.SinceInSeconds(startRPCTime))
 		metrics.DeprecatedDevicePluginAllocationLatency.WithLabelValues(resource).Observe(metrics.SinceInMicroseconds(startRPCTime))
 		if err != nil {
 			// In case of allocation failure, we want to restore m.allocatedDevices

pkg/kubelet/kubelet.go

@@ -1500,7 +1500,7 @@ func (kl *Kubelet) syncPod(o syncPodOptions) error {
 		if !firstSeenTime.IsZero() {
 			// This is the first time we are syncing the pod. Record the latency
 			// since kubelet first saw the pod if firstSeenTime is set.
-			metrics.PodWorkerStartLatency.Observe(metrics.SinceInSeconds(firstSeenTime))
+			metrics.PodWorkerStartDuration.Observe(metrics.SinceInSeconds(firstSeenTime))
 			metrics.DeprecatedPodWorkerStartLatency.Observe(metrics.SinceInMicroseconds(firstSeenTime))
 		} else {
 			klog.V(3).Infof("First seen time not recorded for pod %q", pod.UID)
@@ -1518,7 +1518,7 @@ func (kl *Kubelet) syncPod(o syncPodOptions) error {
 	existingStatus, ok := kl.statusManager.GetPodStatus(pod.UID)
 	if !ok || existingStatus.Phase == v1.PodPending && apiPodStatus.Phase == v1.PodRunning &&
 		!firstSeenTime.IsZero() {
-		metrics.PodStartLatency.Observe(metrics.SinceInSeconds(firstSeenTime))
+		metrics.PodStartDuration.Observe(metrics.SinceInSeconds(firstSeenTime))
 		metrics.DeprecatedPodStartLatency.Observe(metrics.SinceInMicroseconds(firstSeenTime))
 	}
 
@@ -1998,7 +1998,7 @@ func (kl *Kubelet) dispatchWork(pod *v1.Pod, syncType kubetypes.SyncPodType, mir
 		UpdateType: syncType,
 		OnCompleteFunc: func(err error) {
 			if err != nil {
-				metrics.PodWorkerLatency.WithLabelValues(syncType.String()).Observe(metrics.SinceInSeconds(start))
+				metrics.PodWorkerDuration.WithLabelValues(syncType.String()).Observe(metrics.SinceInSeconds(start))
 				metrics.DeprecatedPodWorkerLatency.WithLabelValues(syncType.String()).Observe(metrics.SinceInMicroseconds(start))
 			}
 		},

pkg/kubelet/kuberuntime/instrumented_services.go

@@ -50,7 +50,7 @@ func newInstrumentedImageManagerService(service internalapi.ImageManagerService)
 func recordOperation(operation string, start time.Time) {
 	metrics.RuntimeOperations.WithLabelValues(operation).Inc()
 	metrics.DeprecatedRuntimeOperations.WithLabelValues(operation).Inc()
-	metrics.RuntimeOperationsLatency.WithLabelValues(operation).Observe(metrics.SinceInSeconds(start))
+	metrics.RuntimeOperationsDuration.WithLabelValues(operation).Observe(metrics.SinceInSeconds(start))
 	metrics.DeprecatedRuntimeOperationsLatency.WithLabelValues(operation).Observe(metrics.SinceInMicroseconds(start))
 }
 

pkg/kubelet/kuberuntime/instrumented_services_test.go

@@ -30,7 +30,7 @@ import (
 
 func TestRecordOperation(t *testing.T) {
 	prometheus.MustRegister(metrics.RuntimeOperations)
-	prometheus.MustRegister(metrics.RuntimeOperationsLatency)
+	prometheus.MustRegister(metrics.RuntimeOperationsDuration)
 	prometheus.MustRegister(metrics.RuntimeOperationsErrors)
 
 	temporalServer := "127.0.0.1:1234"
@@ -51,7 +51,7 @@ func TestRecordOperation(t *testing.T) {
 
 	recordOperation("create_container", time.Now())
 	runtimeOperationsCounterExpected := "kubelet_runtime_operations_total{operation_type=\"create_container\"} 1"
-	runtimeOperationsLatencyExpected := "kubelet_runtime_operations_latency_seconds_count{operation_type=\"create_container\"} 1"
+	runtimeOperationsDurationExpected := "kubelet_runtime_operations_duration_seconds_count{operation_type=\"create_container\"} 1"
 
 	assert.HTTPBodyContains(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		mux.ServeHTTP(w, r)
@@ -59,7 +59,7 @@ func TestRecordOperation(t *testing.T) {
 
 	assert.HTTPBodyContains(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		mux.ServeHTTP(w, r)
-	}), "GET", prometheusURL, nil, runtimeOperationsLatencyExpected)
+	}), "GET", prometheusURL, nil, runtimeOperationsDurationExpected)
 }
 
 func TestInstrumentedVersion(t *testing.T) {

pkg/kubelet/metrics/metrics.go

@@ -34,11 +34,11 @@ const (
 	KubeletSubsystem                     = "kubelet"
 	NodeNameKey                          = "node_name"
 	NodeLabelKey                         = "node"
-	PodWorkerLatencyKey                  = "pod_worker_latency_seconds"
+	PodWorkerDurationKey                 = "pod_worker_duration_seconds"
-	PodStartLatencyKey                   = "pod_start_latency_seconds"
+	PodStartDurationKey                  = "pod_start_duration_seconds"
-	CgroupManagerOperationsKey           = "cgroup_manager_latency_seconds"
+	CgroupManagerOperationsKey           = "cgroup_manager_duration_seconds"
-	PodWorkerStartLatencyKey             = "pod_worker_start_latency_seconds"
+	PodWorkerStartDurationKey            = "pod_worker_start_duration_seconds"
-	PLEGRelistLatencyKey                 = "pleg_relist_latency_seconds"
+	PLEGRelistDurationKey                = "pleg_relist_duration_seconds"
 	PLEGDiscardEventsKey                 = "pleg_discard_events"
 	PLEGRelistIntervalKey                = "pleg_relist_interval_seconds"
 	EvictionStatsAgeKey                  = "eviction_stats_age_seconds"
@@ -57,14 +57,14 @@ const (
 	VolumeStatsInodesUsedKey             = "volume_stats_inodes_used"
 	// Metrics keys of remote runtime operations
 	RuntimeOperationsKey                  = "runtime_operations_total"
-	RuntimeOperationsLatencyKey           = "runtime_operations_latency_seconds"
+	RuntimeOperationsDurationKey          = "runtime_operations_duration_seconds"
 	RuntimeOperationsErrorsKey            = "runtime_operations_errors_total"
 	DeprecatedRuntimeOperationsKey        = "runtime_operations"
 	DeprecatedRuntimeOperationsLatencyKey = "runtime_operations_latency_microseconds"
 	DeprecatedRuntimeOperationsErrorsKey  = "runtime_operations_errors"
 	// Metrics keys of device plugin operations
 	DevicePluginRegistrationCountKey           = "device_plugin_registration_total"
-	DevicePluginAllocationLatencyKey           = "device_plugin_alloc_latency_seconds"
+	DevicePluginAllocationDurationKey          = "device_plugin_alloc_duration_seconds"
 	DeprecatedDevicePluginRegistrationCountKey = "device_plugin_registration_count"
 	DeprecatedDevicePluginAllocationLatencyKey = "device_plugin_alloc_latency_microseconds"
 
@@ -101,45 +101,45 @@ var (
 			Buckets:   prometheus.DefBuckets,
 		},
 	)
-	PodWorkerLatency = prometheus.NewHistogramVec(
+	PodWorkerDuration = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      PodWorkerLatencyKey,
+			Name:      PodWorkerDurationKey,
-			Help:      "Latency in seconds to sync a single pod. Broken down by operation type: create, update, or sync",
+			Help:      "Duration in seconds to sync a single pod. Broken down by operation type: create, update, or sync",
 			Buckets:   prometheus.DefBuckets,
 		},
 		[]string{"operation_type"},
 	)
-	PodStartLatency = prometheus.NewHistogram(
+	PodStartDuration = prometheus.NewHistogram(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      PodStartLatencyKey,
+			Name:      PodStartDurationKey,
-			Help:      "Latency in seconds for a single pod to go from pending to running.",
+			Help:      "Duration in seconds for a single pod to go from pending to running.",
 			Buckets:   prometheus.DefBuckets,
 		},
 	)
-	CgroupManagerLatency = prometheus.NewHistogramVec(
+	CgroupManagerDuration = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
 			Name:      CgroupManagerOperationsKey,
-			Help:      "Latency in seconds for cgroup manager operations. Broken down by method.",
+			Help:      "Duration in seconds for cgroup manager operations. Broken down by method.",
 			Buckets:   prometheus.DefBuckets,
 		},
 		[]string{"operation_type"},
 	)
-	PodWorkerStartLatency = prometheus.NewHistogram(
+	PodWorkerStartDuration = prometheus.NewHistogram(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      PodWorkerStartLatencyKey,
+			Name:      PodWorkerStartDurationKey,
-			Help:      "Latency in seconds from seeing a pod to starting a worker.",
+			Help:      "Duration in seconds from seeing a pod to starting a worker.",
 			Buckets:   prometheus.DefBuckets,
 		},
 	)
-	PLEGRelistLatency = prometheus.NewHistogram(
+	PLEGRelistDuration = prometheus.NewHistogram(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      PLEGRelistLatencyKey,
+			Name:      PLEGRelistDurationKey,
-			Help:      "Latency in seconds for relisting pods in PLEG.",
+			Help:      "Duration in seconds for relisting pods in PLEG.",
 			Buckets:   prometheus.DefBuckets,
 		},
 	)
@@ -168,11 +168,11 @@ var (
 		},
 		[]string{"operation_type"},
 	)
-	RuntimeOperationsLatency = prometheus.NewHistogramVec(
+	RuntimeOperationsDuration = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      RuntimeOperationsLatencyKey,
+			Name:      RuntimeOperationsDurationKey,
-			Help:      "Latency in seconds of runtime operations. Broken down by operation type.",
+			Help:      "Duration in seconds of runtime operations. Broken down by operation type.",
 			Buckets:   prometheus.DefBuckets,
 		},
 		[]string{"operation_type"},
@@ -202,11 +202,11 @@ var (
 		},
 		[]string{"resource_name"},
 	)
-	DevicePluginAllocationLatency = prometheus.NewHistogramVec(
+	DevicePluginAllocationDuration = prometheus.NewHistogramVec(
 		prometheus.HistogramOpts{
 			Subsystem: KubeletSubsystem,
-			Name:      DevicePluginAllocationLatencyKey,
+			Name:      DevicePluginAllocationDurationKey,
-			Help:      "Latency in seconds to serve a device plugin Allocation request. Broken down by resource name.",
+			Help:      "Duration in seconds to serve a device plugin Allocation request. Broken down by resource name.",
 			Buckets:   prometheus.DefBuckets,
 		},
 		[]string{"resource_name"},
@@ -363,21 +363,21 @@ func Register(containerCache kubecontainer.RuntimeCache, collectors ...prometheu
 	// Register the metrics.
 	registerMetrics.Do(func() {
 		prometheus.MustRegister(NodeName)
-		prometheus.MustRegister(PodWorkerLatency)
+		prometheus.MustRegister(PodWorkerDuration)
-		prometheus.MustRegister(PodStartLatency)
+		prometheus.MustRegister(PodStartDuration)
-		prometheus.MustRegister(CgroupManagerLatency)
+		prometheus.MustRegister(CgroupManagerDuration)
-		prometheus.MustRegister(PodWorkerStartLatency)
+		prometheus.MustRegister(PodWorkerStartDuration)
 		prometheus.MustRegister(ContainersPerPodCount)
 		prometheus.MustRegister(newPodAndContainerCollector(containerCache))
-		prometheus.MustRegister(PLEGRelistLatency)
+		prometheus.MustRegister(PLEGRelistDuration)
 		prometheus.MustRegister(PLEGDiscardEvents)
 		prometheus.MustRegister(PLEGRelistInterval)
 		prometheus.MustRegister(RuntimeOperations)
-		prometheus.MustRegister(RuntimeOperationsLatency)
+		prometheus.MustRegister(RuntimeOperationsDuration)
 		prometheus.MustRegister(RuntimeOperationsErrors)
 		prometheus.MustRegister(EvictionStatsAge)
 		prometheus.MustRegister(DevicePluginRegistrationCount)
-		prometheus.MustRegister(DevicePluginAllocationLatency)
+		prometheus.MustRegister(DevicePluginAllocationDuration)
 		prometheus.MustRegister(DeprecatedPodWorkerLatency)
 		prometheus.MustRegister(DeprecatedPodStartLatency)
 		prometheus.MustRegister(DeprecatedCgroupManagerLatency)

pkg/kubelet/pleg/generic.go

@@ -195,7 +195,7 @@ func (g *GenericPLEG) relist() {
 
 	timestamp := g.clock.Now()
 	defer func() {
-		metrics.PLEGRelistLatency.Observe(metrics.SinceInSeconds(timestamp))
+		metrics.PLEGRelistDuration.Observe(metrics.SinceInSeconds(timestamp))
 		metrics.DeprecatedPLEGRelistLatency.Observe(metrics.SinceInMicroseconds(timestamp))
 	}()
 

test/e2e/framework/kubelet_stats.go

@@ -102,13 +102,13 @@ func getKubeletMetrics(c clientset.Interface, nodeName string) (metrics.KubeletM
 // Note that the KubeletMetrics passed in should not contain subsystem prefix.
 func GetDefaultKubeletLatencyMetrics(ms metrics.KubeletMetrics) KubeletLatencyMetrics {
 	latencyMetricNames := sets.NewString(
-		kubeletmetrics.PodWorkerLatencyKey,
+		kubeletmetrics.PodWorkerDurationKey,
-		kubeletmetrics.PodWorkerStartLatencyKey,
+		kubeletmetrics.PodWorkerStartDurationKey,
-		kubeletmetrics.PodStartLatencyKey,
+		kubeletmetrics.PodStartDurationKey,
 		kubeletmetrics.CgroupManagerOperationsKey,
 		dockermetrics.DockerOperationsLatencyKey,
-		kubeletmetrics.PodWorkerStartLatencyKey,
+		kubeletmetrics.PodWorkerStartDurationKey,
-		kubeletmetrics.PLEGRelistLatencyKey,
+		kubeletmetrics.PLEGRelistDurationKey,
 	)
 	return GetKubeletLatencyMetrics(ms, latencyMetricNames)
 }

test/e2e/framework/metrics_util.go

@@ -168,9 +168,9 @@ var InterestingKubeletMetrics = []string{
 	"kubelet_docker_errors",
 	"kubelet_docker_operations_latency_seconds",
 	"kubelet_generate_pod_status_latency_microseconds",
-	"kubelet_pod_start_latency_seconds",
+	"kubelet_pod_start_duration_seconds",
-	"kubelet_pod_worker_latency_seconds",
+	"kubelet_pod_worker_duration_seconds",
-	"kubelet_pod_worker_start_latency_seconds",
+	"kubelet_pod_worker_start_duration_seconds",
 	"kubelet_sync_pods_latency_microseconds",
 }
 

test/e2e_node/density_test.go

@@ -459,12 +459,12 @@ func getPodStartLatency(node string) (framework.KubeletLatencyMetrics, error) {
 
 	for _, samples := range ms {
 		for _, sample := range samples {
-			if sample.Metric["__name__"] == kubemetrics.KubeletSubsystem+"_"+kubemetrics.PodStartLatencyKey {
+			if sample.Metric["__name__"] == kubemetrics.KubeletSubsystem+"_"+kubemetrics.PodStartDurationKey {
 				quantile, _ := strconv.ParseFloat(string(sample.Metric["quantile"]), 64)
 				latencyMetrics = append(latencyMetrics,
 					framework.KubeletLatencyMetric{
 						Quantile: quantile,
-						Method:   kubemetrics.PodStartLatencyKey,
+						Method:   kubemetrics.PodStartDurationKey,
 						Latency:  time.Duration(int(sample.Value)) * time.Microsecond})
 			}
 		}

test/e2e_node/gpu_device_plugin.go

@@ -156,7 +156,7 @@ func logDevicePluginMetrics() {
 	framework.ExpectNoError(err)
 	for msKey, samples := range ms {
 		switch msKey {
-		case kubeletmetrics.KubeletSubsystem + "_" + kubeletmetrics.DevicePluginAllocationLatencyKey:
+		case kubeletmetrics.KubeletSubsystem + "_" + kubeletmetrics.DevicePluginAllocationDurationKey:
 			for _, sample := range samples {
 				latency := sample.Value
 				resource := string(sample.Metric["resource_name"])