[receiver/kubeletstats] remove direction feature gate (#14961)

The following feature gates have been removed after being deprecated for a few versions:

- `receiver.kubeletstatsreceiver.emitMetricsWithoutDirectionAttribute`
- `receiver.kubeletstatsreceiver.emitMetricsWithDirectionAttribute`

.chloggen/rm-direction-kubeletstats.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: kubeletstatsreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "remove direction feature gate"
+
+# One or more tracking issues related to the change
+issues: [14961]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

receiver/kubeletstatsreceiver/README.md

@@ -191,17 +191,5 @@ with detailed sample configurations [here](./testdata/config.yaml).
 
 Details about the metrics produced by this receiver can be found in [metadata.yaml](./metadata.yaml) with further documentation in [documentation.md](./documentation.md)
 
-### Feature gate configurations
-
-#### Transition from metrics with "direction" attribute
-
-The proposal to change metrics from being reported with a `direction` attribute has been reverted in the specification. As a result, the
-following feature gates will be removed in v0.62.0:
-
-- **receiver.kubeletstatsreceiver.emitMetricsWithoutDirectionAttribute**
-- **receiver.kubeletstatsreceiver.emitMetricsWithDirectionAttribute**
-
-For additional information, see https://github.com/open-telemetry/opentelemetry-specification/issues/2726.
-
 [beta]:https://github.com/open-telemetry/opentelemetry-collector#beta
 [contrib]:https://github.com/open-telemetry/opentelemetry-collector-releases/tree/main/distributions/otelcol-contrib

receiver/kubeletstatsreceiver/documentation.md

@@ -31,11 +31,7 @@ These are the metrics available for this scraper.
 | **k8s.node.memory.usage** | Node memory usage | By | Gauge(Int) | <ul> </ul> |
 | **k8s.node.memory.working_set** | Node memory working_set | By | Gauge(Int) | <ul> </ul> |
 | **k8s.node.network.errors** | Node network errors | 1 | Sum(Int) | <ul> <li>interface</li> <li>direction</li> </ul> |
-| **k8s.node.network.errors.receive** | Node network receive errors | 1 | Sum(Int) | <ul> <li>interface</li> </ul> |
-| **k8s.node.network.errors.transmit** | Node network transmission errors | 1 | Sum(Int) | <ul> <li>interface</li> </ul> |
 | **k8s.node.network.io** | Node network IO | By | Sum(Int) | <ul> <li>interface</li> <li>direction</li> </ul> |
-| **k8s.node.network.io.receive** | Node network IO received | By | Sum(Int) | <ul> <li>interface</li> </ul> |
-| **k8s.node.network.io.transmit** | Node network IO transmitted | By | Sum(Int) | <ul> <li>interface</li> </ul> |
 | **k8s.pod.cpu.time** | Pod CPU time | s | Sum(Double) | <ul> </ul> |
 | **k8s.pod.cpu.utilization** | Pod CPU utilization | 1 | Gauge(Double) | <ul> </ul> |
 | **k8s.pod.filesystem.available** | Pod filesystem available | By | Gauge(Int) | <ul> </ul> |
@@ -48,11 +44,7 @@ These are the metrics available for this scraper.
 | **k8s.pod.memory.usage** | Pod memory usage | By | Gauge(Int) | <ul> </ul> |
 | **k8s.pod.memory.working_set** | Pod memory working_set | By | Gauge(Int) | <ul> </ul> |
 | **k8s.pod.network.errors** | Pod network errors | 1 | Sum(Int) | <ul> <li>interface</li> <li>direction</li> </ul> |
-| **k8s.pod.network.errors.receive** | Pod network receive errors | 1 | Sum(Int) | <ul> <li>interface</li> </ul> |
-| **k8s.pod.network.errors.transmit** | Pod network transmission errors | 1 | Sum(Int) | <ul> <li>interface</li> </ul> |
 | **k8s.pod.network.io** | Pod network IO | By | Sum(Int) | <ul> <li>interface</li> <li>direction</li> </ul> |
-| **k8s.pod.network.io.receive** | Pod network IO received | By | Sum(Int) | <ul> <li>interface</li> </ul> |
-| **k8s.pod.network.io.transmit** | Pod network IO transmitted | By | Sum(Int) | <ul> <li>interface</li> </ul> |
 | **k8s.volume.available** | The number of available bytes in the volume. | By | Gauge(Int) | <ul> </ul> |
 | **k8s.volume.capacity** | The total capacity in bytes of the volume. | By | Gauge(Int) | <ul> </ul> |
 | **k8s.volume.inodes** | The total inodes in the filesystem. | 1 | Gauge(Int) | <ul> </ul> |

receiver/kubeletstatsreceiver/internal/kubelet/accumulator.go

@@ -44,14 +44,12 @@ var ValidMetricGroups = map[MetricGroup]bool{
 }
 
 type metricDataAccumulator struct {
-	m                                    []pmetric.Metrics
-	metadata                             Metadata
-	logger                               *zap.Logger
-	metricGroupsToCollect                map[MetricGroup]bool
-	time                                 time.Time
-	mbs                                  *metadata.MetricsBuilders
-	emitMetricsWithDirectionAttribute    bool
-	emitMetricsWithoutDirectionAttribute bool
+	m                     []pmetric.Metrics
+	metadata              Metadata
+	logger                *zap.Logger
+	metricGroupsToCollect map[MetricGroup]bool
+	time                  time.Time
+	mbs                   *metadata.MetricsBuilders
 }
 
 func (a *metricDataAccumulator) nodeStats(s stats.NodeStats) {
@@ -63,12 +61,7 @@ func (a *metricDataAccumulator) nodeStats(s stats.NodeStats) {
 	addCPUMetrics(a.mbs.NodeMetricsBuilder, metadata.NodeCPUMetrics, s.CPU, currentTime)
 	addMemoryMetrics(a.mbs.NodeMetricsBuilder, metadata.NodeMemoryMetrics, s.Memory, currentTime)
 	addFilesystemMetrics(a.mbs.NodeMetricsBuilder, metadata.NodeFilesystemMetrics, s.Fs, currentTime)
-	if a.emitMetricsWithDirectionAttribute {
-		addNetworkMetricsWithDirection(a.mbs.NodeMetricsBuilder, metadata.NodeNetworkMetricsWithDirection, s.Network, currentTime)
-	}
-	if a.emitMetricsWithoutDirectionAttribute {
-		addNetworkMetrics(a.mbs.NodeMetricsBuilder, metadata.NodeNetworkMetrics, s.Network, currentTime)
-	}
+	addNetworkMetricsWithDirection(a.mbs.NodeMetricsBuilder, metadata.NodeNetworkMetricsWithDirection, s.Network, currentTime)
 	// todo s.Runtime.ImageFs
 
 	a.m = append(a.m, a.mbs.NodeMetricsBuilder.Emit(
@@ -86,12 +79,7 @@ func (a *metricDataAccumulator) podStats(s stats.PodStats) {
 	addCPUMetrics(a.mbs.PodMetricsBuilder, metadata.PodCPUMetrics, s.CPU, currentTime)
 	addMemoryMetrics(a.mbs.PodMetricsBuilder, metadata.PodMemoryMetrics, s.Memory, currentTime)
 	addFilesystemMetrics(a.mbs.PodMetricsBuilder, metadata.PodFilesystemMetrics, s.EphemeralStorage, currentTime)
-	if a.emitMetricsWithDirectionAttribute {
-		addNetworkMetricsWithDirection(a.mbs.PodMetricsBuilder, metadata.PodNetworkMetricsWithDirection, s.Network, currentTime)
-	}
-	if a.emitMetricsWithoutDirectionAttribute {
-		addNetworkMetrics(a.mbs.PodMetricsBuilder, metadata.PodNetworkMetrics, s.Network, currentTime)
-	}
+	addNetworkMetricsWithDirection(a.mbs.PodMetricsBuilder, metadata.PodNetworkMetricsWithDirection, s.Network, currentTime)
 
 	a.m = append(a.m, a.mbs.PodMetricsBuilder.Emit(
 		metadata.WithStartTimeOverride(pcommon.NewTimestampFromTime(s.StartTime.Time)),

receiver/kubeletstatsreceiver/internal/kubelet/metrics.go

@@ -28,17 +28,13 @@ func MetricsData(
 	logger *zap.Logger, summary *stats.Summary,
 	metadata Metadata,
 	metricGroupsToCollect map[MetricGroup]bool,
-	mbs *metadata.MetricsBuilders,
-	emitMetricsWithDirectionAttribute,
-	emitMetricsWithoutDirectionAttribute bool) []pmetric.Metrics {
+	mbs *metadata.MetricsBuilders) []pmetric.Metrics {
 	acc := &metricDataAccumulator{
-		metadata:                             metadata,
-		logger:                               logger,
-		metricGroupsToCollect:                metricGroupsToCollect,
-		time:                                 time.Now(),
-		mbs:                                  mbs,
-		emitMetricsWithDirectionAttribute:    emitMetricsWithDirectionAttribute,
-		emitMetricsWithoutDirectionAttribute: emitMetricsWithoutDirectionAttribute,
+		metadata:              metadata,
+		logger:                logger,
+		metricGroupsToCollect: metricGroupsToCollect,
+		time:                  time.Now(),
+		mbs:                   mbs,
 	}
 	acc.nodeStats(summary.Node)
 	for _, podStats := range summary.Pods {

receiver/kubeletstatsreceiver/internal/kubelet/metrics_test.go

@@ -51,12 +51,12 @@ func TestMetricAccumulator(t *testing.T) {
 		ContainerMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsSettings(), componenttest.NewNopReceiverCreateSettings().BuildInfo),
 		OtherMetricsBuilder:     metadata.NewMetricsBuilder(metadata.DefaultMetricsSettings(), componenttest.NewNopReceiverCreateSettings().BuildInfo),
 	}
-	requireMetricsOk(t, MetricsData(zap.NewNop(), summary, k8sMetadata, ValidMetricGroups, mbs, true, false))
+	requireMetricsOk(t, MetricsData(zap.NewNop(), summary, k8sMetadata, ValidMetricGroups, mbs))
 	// Disable all groups
 	mbs.NodeMetricsBuilder.Reset()
 	mbs.PodMetricsBuilder.Reset()
 	mbs.OtherMetricsBuilder.Reset()
-	require.Equal(t, 0, len(MetricsData(zap.NewNop(), summary, k8sMetadata, map[MetricGroup]bool{}, mbs, true, false)))
+	require.Equal(t, 0, len(MetricsData(zap.NewNop(), summary, k8sMetadata, map[MetricGroup]bool{}, mbs)))
 }
 
 func requireMetricsOk(t *testing.T, mds []pmetric.Metrics) {
@@ -112,7 +112,7 @@ func requireResourceOk(t *testing.T, resource pcommon.Resource) {
 }
 
 func TestWorkingSetMem(t *testing.T) {
-	metrics := indexedFakeMetrics(true, false)
+	metrics := indexedFakeMetrics()
 	requireContains(t, metrics, "k8s.pod.memory.working_set")
 	requireContains(t, metrics, "container.memory.working_set")
 
@@ -122,7 +122,7 @@ func TestWorkingSetMem(t *testing.T) {
 }
 
 func TestPageFaults(t *testing.T) {
-	metrics := indexedFakeMetrics(true, false)
+	metrics := indexedFakeMetrics()
 	requireContains(t, metrics, "k8s.pod.memory.page_faults")
 	requireContains(t, metrics, "container.memory.page_faults")
 
@@ -132,7 +132,7 @@ func TestPageFaults(t *testing.T) {
 }
 
 func TestMajorPageFaults(t *testing.T) {
-	metrics := indexedFakeMetrics(true, false)
+	metrics := indexedFakeMetrics()
 	requireContains(t, metrics, "k8s.pod.memory.major_page_faults")
 	requireContains(t, metrics, "container.memory.major_page_faults")
 
@@ -142,7 +142,7 @@ func TestMajorPageFaults(t *testing.T) {
 }
 
 func TestEmitMetricsWithDirectionAttribute(t *testing.T) {
-	metrics := indexedFakeMetrics(true, false)
+	metrics := indexedFakeMetrics()
 	metricNamesWithDirectionAttr := []string{
 		"k8s.node.network.io",
 		"k8s.node.network.errors",
@@ -160,36 +160,13 @@ func TestEmitMetricsWithDirectionAttribute(t *testing.T) {
 	}
 }
 
-func TestEmitMetricsWithoutDirectionAttribute(t *testing.T) {
-	metrics := indexedFakeMetrics(false, true)
-	metricNamesWithoutDirectionAttr := []string{
-		"k8s.node.network.io.receive",
-		"k8s.node.network.io.transmit",
-		"k8s.node.network.errors.receive",
-		"k8s.node.network.errors.transmit",
-		"k8s.pod.network.io.receive",
-		"k8s.pod.network.io.transmit",
-		"k8s.pod.network.errors.receive",
-		"k8s.pod.network.errors.transmit",
-	}
-	for _, name := range metricNamesWithoutDirectionAttr {
-		requireContains(t, metrics, name)
-		metric := metrics[name][0]
-		for i := 0; i < metric.Sum().DataPoints().Len(); i++ {
-			dp := metric.Sum().DataPoints().At(i)
-			_, found := dp.Attributes().Get("direction")
-			require.False(t, found, "unexpected direction attribute")
-		}
-	}
-}
-
 func requireContains(t *testing.T, metrics map[string][]pmetric.Metric, metricName string) {
 	_, found := metrics[metricName]
 	require.True(t, found)
 }
 
-func indexedFakeMetrics(emitMetricsWithDirectionAttribute, emitMetricsWithoutDirectionAttribute bool) map[string][]pmetric.Metric {
-	mds := fakeMetrics(emitMetricsWithDirectionAttribute, emitMetricsWithoutDirectionAttribute)
+func indexedFakeMetrics() map[string][]pmetric.Metric {
+	mds := fakeMetrics()
 	metrics := make(map[string][]pmetric.Metric)
 	for _, md := range mds {
 		for i := 0; i < md.ResourceMetrics().Len(); i++ {
@@ -209,7 +186,7 @@ func indexedFakeMetrics(emitMetricsWithDirectionAttribute, emitMetricsWithoutDir
 	return metrics
 }
 
-func fakeMetrics(emitMetricsWithDirectionAttribute, emitMetricsWithoutDirectionAttribute bool) []pmetric.Metrics {
+func fakeMetrics() []pmetric.Metrics {
 	rc := &fakeRestClient{}
 	statsProvider := NewStatsProvider(rc)
 	summary, _ := statsProvider.StatsSummary()
@@ -224,5 +201,5 @@ func fakeMetrics(emitMetricsWithDirectionAttribute, emitMetricsWithoutDirectionA
 		ContainerMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsSettings(), componenttest.NewNopReceiverCreateSettings().BuildInfo),
 		OtherMetricsBuilder:     metadata.NewMetricsBuilder(metadata.DefaultMetricsSettings(), componenttest.NewNopReceiverCreateSettings().BuildInfo),
 	}
-	return MetricsData(zap.NewNop(), summary, Metadata{}, mgs, mbs, emitMetricsWithDirectionAttribute, emitMetricsWithoutDirectionAttribute)
+	return MetricsData(zap.NewNop(), summary, Metadata{}, mgs, mbs)
 }

receiver/kubeletstatsreceiver/internal/kubelet/network.go

@@ -23,27 +23,6 @@ import (
 
 type getNetworkDataFunc func(s *stats.NetworkStats) (rx *uint64, tx *uint64)
 
-func addNetworkMetrics(mb *metadata.MetricsBuilder, networkMetrics metadata.NetworkMetrics, s *stats.NetworkStats, currentTime pcommon.Timestamp) {
-	if s == nil {
-		return
-	}
-
-	recordNetworkDataPoint(mb, networkMetrics.IO, s, getNetworkIO, currentTime)
-	recordNetworkDataPoint(mb, networkMetrics.Errors, s, getNetworkErrors, currentTime)
-}
-
-func recordNetworkDataPoint(mb *metadata.MetricsBuilder, r metadata.NetworkMetricsRecorder, s *stats.NetworkStats, getData getNetworkDataFunc, currentTime pcommon.Timestamp) {
-	rx, tx := getData(s)
-
-	if rx != nil {
-		r.RecordReceiveDataPoint(mb, currentTime, int64(*rx), s.Name)
-	}
-
-	if tx != nil {
-		r.RecordTransmitDataPoint(mb, currentTime, int64(*tx), s.Name)
-	}
-}
-
 func addNetworkMetricsWithDirection(mb *metadata.MetricsBuilder, networkMetrics metadata.NetworkMetricsWithDirection, s *stats.NetworkStats, currentTime pcommon.Timestamp) {
 	if s == nil {
 		return