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prometheus_machine_test.go
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// Copyright 2020 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package metrics
import (
"bytes"
"io/ioutil"
"reflect"
"testing"
"time"
"github.com/google/cadvisor/container"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/common/expfmt"
"github.com/stretchr/testify/assert"
)
const machineMetricsFile = "testdata/prometheus_machine_metrics"
const machineMetricsFailureFile = "testdata/prometheus_machine_metrics_failure"
func TestPrometheusMachineCollector(t *testing.T) {
collector := NewPrometheusMachineCollector(testSubcontainersInfoProvider{}, container.AllMetrics)
registry := prometheus.NewRegistry()
registry.MustRegister(collector)
metricsFamily, err := registry.Gather()
assert.Nil(t, err)
var metricBuffer bytes.Buffer
for _, metricFamily := range metricsFamily {
_, err := expfmt.MetricFamilyToText(&metricBuffer, metricFamily)
assert.Nil(t, err)
}
collectedMetrics := metricBuffer.String()
expectedMetrics, err := ioutil.ReadFile(machineMetricsFile)
assert.Nil(t, err)
assert.Equal(t, string(expectedMetrics), collectedMetrics)
}
func TestPrometheusMachineCollectorWithFailure(t *testing.T) {
provider := &erroringSubcontainersInfoProvider{
successfulProvider: testSubcontainersInfoProvider{},
shouldFail: true,
}
collector := NewPrometheusMachineCollector(provider, container.AllMetrics)
registry := prometheus.NewRegistry()
registry.MustRegister(collector)
metricsFamily, err := registry.Gather()
assert.Nil(t, err)
var metricBuffer bytes.Buffer
for _, metricFamily := range metricsFamily {
_, err := expfmt.MetricFamilyToText(&metricBuffer, metricFamily)
assert.Nil(t, err)
}
collectedMetrics := metricBuffer.String()
expectedMetrics, err := ioutil.ReadFile(machineMetricsFailureFile)
assert.Nil(t, err)
assert.Equal(t, string(expectedMetrics), collectedMetrics)
}
func TestGetMemoryByType(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
capacityMetrics := getMemoryByType(machineInfo, memoryByTypeDimmCapacityKey)
assert.Equal(t, 2, len(capacityMetrics))
countMetrics := getMemoryByType(machineInfo, memoryByTypeDimmCountKey)
assert.Equal(t, 2, len(countMetrics))
}
func TestGetMemoryByTypeWithWrongProperty(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
metricVals := getMemoryByType(machineInfo, "wrong_property_name")
assert.Equal(t, 0, len(metricVals))
}
func TestGetCaches(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
metricVals := getCaches(machineInfo)
assert.Equal(t, 25, len(metricVals))
expectedMetricVals := []metricValue{
{value: 32768, labels: []string{"0", "0", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"0", "0", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262144, labels: []string{"0", "0", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"0", "1", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"0", "1", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262148, labels: []string{"0", "1", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"0", "2", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"0", "2", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262144, labels: []string{"0", "2", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"0", "3", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"0", "3", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262148, labels: []string{"0", "3", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"1", "4", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"1", "4", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262144, labels: []string{"1", "4", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"1", "5", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"1", "5", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262148, labels: []string{"1", "5", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"1", "6", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32768, labels: []string{"1", "6", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262144, labels: []string{"1", "6", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"1", "7", "Data", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 32764, labels: []string{"1", "7", "Instruction", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 262148, labels: []string{"1", "7", "Unified", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 8388608, labels: []string{"1", "", "Unified", "3"}, timestamp: time.Unix(1395066363, 0)},
}
assertMetricValues(t, expectedMetricVals, metricVals, "Unexpected information about Node memory")
}
func TestGetThreadsSiblingsCount(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
metricVals := getThreadsSiblingsCount(machineInfo)
assert.Equal(t, 16, len(metricVals))
expectedMetricVals := []metricValue{
{value: 2, labels: []string{"0", "0", "0"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "0", "1"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "1", "2"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "1", "3"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "2", "4"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "2", "5"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "3", "6"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"0", "3", "7"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "4", "8"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "4", "9"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "5", "10"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "5", "11"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "6", "12"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "6", "13"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "7", "14"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "7", "15"}, timestamp: time.Unix(1395066363, 0)},
}
assertMetricValues(t, expectedMetricVals, metricVals, "Unexpected information about CPU threads")
}
func TestGetNodeMemory(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
metricVals := getNodeMemory(machineInfo)
assert.Equal(t, 2, len(metricVals))
expectedMetricVals := []metricValue{
{value: 33604804608, labels: []string{"0"}, timestamp: time.Unix(1395066363, 0)},
{value: 33604804606, labels: []string{"1"}, timestamp: time.Unix(1395066363, 0)},
}
assertMetricValues(t, expectedMetricVals, metricVals, "Unexpected information about Node memory")
}
func TestGetHugePagesCount(t *testing.T) {
machineInfo, err := testSubcontainersInfoProvider{}.GetMachineInfo()
assert.Nil(t, err)
metricVals := getHugePagesCount(machineInfo)
assert.Equal(t, 4, len(metricVals))
expectedMetricVals := []metricValue{
{value: 0, labels: []string{"0", "1048576"}, timestamp: time.Unix(1395066363, 0)},
{value: 0, labels: []string{"0", "2048"}, timestamp: time.Unix(1395066363, 0)},
{value: 2, labels: []string{"1", "1048576"}, timestamp: time.Unix(1395066363, 0)},
{value: 4, labels: []string{"1", "2048"}, timestamp: time.Unix(1395066363, 0)},
}
assertMetricValues(t, expectedMetricVals, metricVals, "Unexpected information about Node memory")
}
func assertMetricValues(t *testing.T, expected metricValues, actual metricValues, message string) {
for i := range actual {
assert.Truef(t, reflect.DeepEqual(expected[i], actual[i]),
"%s expected %#v but found %#v\n", message, expected[i], actual[i])
}
}