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metrics_test.go
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metrics_test.go
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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package kubelet
import (
"os"
"testing"
"github.com/stretchr/testify/require"
"go.opentelemetry.io/collector/pdata/pcommon"
"go.opentelemetry.io/collector/pdata/pmetric"
"go.opentelemetry.io/collector/receiver/receivertest"
"go.uber.org/zap"
"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/kubeletstatsreceiver/internal/metadata"
)
type fakeRestClient struct {
}
func (f fakeRestClient) StatsSummary() ([]byte, error) {
return os.ReadFile("../../testdata/stats-summary.json")
}
func (f fakeRestClient) Pods() ([]byte, error) {
return os.ReadFile("../../testdata/pods.json")
}
func TestMetricAccumulator(t *testing.T) {
rc := &fakeRestClient{}
statsProvider := NewStatsProvider(rc)
summary, _ := statsProvider.StatsSummary()
metadataProvider := NewMetadataProvider(rc)
podsMetadata, _ := metadataProvider.Pods()
k8sMetadata := NewMetadata([]MetadataLabel{MetadataLabelContainerID}, podsMetadata, nil)
mbs := &metadata.MetricsBuilders{
NodeMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
PodMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
ContainerMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
OtherMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
}
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)))
}
func requireMetricsOk(t *testing.T, mds []pmetric.Metrics) {
for _, md := range mds {
for i := 0; i < md.ResourceMetrics().Len(); i++ {
rm := md.ResourceMetrics().At(i)
requireResourceOk(t, rm.Resource())
for j := 0; j < rm.ScopeMetrics().Len(); j++ {
ilm := rm.ScopeMetrics().At(j)
require.Equal(t, "otelcol/kubeletstatsreceiver", ilm.Scope().Name())
for k := 0; k < ilm.Metrics().Len(); k++ {
requireMetricOk(t, ilm.Metrics().At(k))
}
}
}
}
}
func requireMetricOk(t *testing.T, m pmetric.Metric) {
require.NotZero(t, m.Name())
require.NotEqual(t, pmetric.MetricTypeEmpty, m.Type())
switch m.Type() {
case pmetric.MetricTypeGauge:
gauge := m.Gauge()
for i := 0; i < gauge.DataPoints().Len(); i++ {
dp := gauge.DataPoints().At(i)
require.NotZero(t, dp.Timestamp())
requirePointOk(t, dp)
}
case pmetric.MetricTypeSum:
sum := m.Sum()
require.True(t, sum.IsMonotonic())
require.Equal(t, pmetric.AggregationTemporalityCumulative, sum.AggregationTemporality())
for i := 0; i < sum.DataPoints().Len(); i++ {
dp := sum.DataPoints().At(i)
// Start time is required for cumulative metrics. Make assertions
// around start time only when dealing with one or when it is set.
require.NotZero(t, dp.StartTimestamp())
require.NotZero(t, dp.Timestamp())
require.Less(t, dp.StartTimestamp(), dp.Timestamp())
requirePointOk(t, dp)
}
case pmetric.MetricTypeEmpty:
case pmetric.MetricTypeHistogram:
case pmetric.MetricTypeExponentialHistogram:
case pmetric.MetricTypeSummary:
}
}
func requirePointOk(t *testing.T, point pmetric.NumberDataPoint) {
require.NotZero(t, point.Timestamp())
require.NotEqual(t, pmetric.NumberDataPointValueTypeEmpty, point.ValueType())
}
func requireResourceOk(t *testing.T, resource pcommon.Resource) {
require.NotZero(t, resource.Attributes().Len())
}
func TestWorkingSetMem(t *testing.T) {
metrics := indexedFakeMetrics()
requireContains(t, metrics, "k8s.pod.memory.working_set")
requireContains(t, metrics, "container.memory.working_set")
nodeWsMetrics := metrics["k8s.node.memory.working_set"]
value := nodeWsMetrics[0].Gauge().DataPoints().At(0).IntValue()
require.Equal(t, int64(1234567890), value)
}
func TestPageFaults(t *testing.T) {
metrics := indexedFakeMetrics()
requireContains(t, metrics, "k8s.pod.memory.page_faults")
requireContains(t, metrics, "container.memory.page_faults")
nodePageFaults := metrics["k8s.node.memory.page_faults"]
value := nodePageFaults[0].Gauge().DataPoints().At(0).IntValue()
require.Equal(t, int64(12345), value)
}
func TestMajorPageFaults(t *testing.T) {
metrics := indexedFakeMetrics()
requireContains(t, metrics, "k8s.pod.memory.major_page_faults")
requireContains(t, metrics, "container.memory.major_page_faults")
nodePageFaults := metrics["k8s.node.memory.major_page_faults"]
value := nodePageFaults[0].Gauge().DataPoints().At(0).IntValue()
require.Equal(t, int64(12), value)
}
func TestEmitMetrics(t *testing.T) {
metrics := indexedFakeMetrics()
metricNames := []string{
"k8s.node.network.io",
"k8s.node.network.errors",
"k8s.pod.network.io",
"k8s.pod.network.errors",
}
for _, name := range metricNames {
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.True(t, found, "expected direction attribute")
}
}
}
func requireContains(t *testing.T, metrics map[string][]pmetric.Metric, metricName string) {
_, found := metrics[metricName]
require.True(t, found)
}
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++ {
rm := md.ResourceMetrics().At(i)
for j := 0; j < rm.ScopeMetrics().Len(); j++ {
ilm := rm.ScopeMetrics().At(j)
for k := 0; k < ilm.Metrics().Len(); k++ {
m := ilm.Metrics().At(k)
metricName := m.Name()
list := metrics[metricName]
list = append(list, m)
metrics[metricName] = list
}
}
}
}
return metrics
}
func fakeMetrics() []pmetric.Metrics {
rc := &fakeRestClient{}
statsProvider := NewStatsProvider(rc)
summary, _ := statsProvider.StatsSummary()
mgs := map[MetricGroup]bool{
ContainerMetricGroup: true,
PodMetricGroup: true,
NodeMetricGroup: true,
}
mbs := &metadata.MetricsBuilders{
NodeMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
PodMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
ContainerMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
OtherMetricsBuilder: metadata.NewMetricsBuilder(metadata.DefaultMetricsBuilderConfig(), receivertest.NewNopCreateSettings()),
}
return MetricsData(zap.NewNop(), summary, Metadata{}, mgs, mbs)
}