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disk_scraper_windows.go
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disk_scraper_windows.go
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// Copyright The OpenTelemetry Authors
//
// 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:https://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 diskscraper
import (
"context"
"fmt"
"time"
"github.com/shirou/gopsutil/host"
"go.opentelemetry.io/collector/consumer/pdata"
"go.opentelemetry.io/collector/internal/processor/filterset"
"go.opentelemetry.io/collector/receiver/hostmetricsreceiver/internal"
"go.opentelemetry.io/collector/receiver/hostmetricsreceiver/internal/perfcounters"
)
const (
logicalDisk = "LogicalDisk"
readsPerSec = "Disk Reads/sec"
writesPerSec = "Disk Writes/sec"
readBytesPerSec = "Disk Read Bytes/sec"
writeBytesPerSec = "Disk Write Bytes/sec"
idleTime = "% Idle Time"
avgDiskSecsPerRead = "Avg. Disk sec/Read"
avgDiskSecsPerWrite = "Avg. Disk sec/Write"
queueLength = "Current Disk Queue Length"
)
// scraper for Disk Metrics
type scraper struct {
config *Config
startTime pdata.TimestampUnixNano
includeFS filterset.FilterSet
excludeFS filterset.FilterSet
perfCounterScraper perfcounters.PerfCounterScraper
// for mocking
bootTime func() (uint64, error)
}
// newDiskScraper creates a Disk Scraper
func newDiskScraper(_ context.Context, cfg *Config) (*scraper, error) {
scraper := &scraper{config: cfg, perfCounterScraper: &perfcounters.PerfLibScraper{}, bootTime: host.BootTime}
var err error
if len(cfg.Include.Devices) > 0 {
scraper.includeFS, err = filterset.CreateFilterSet(cfg.Include.Devices, &cfg.Include.Config)
if err != nil {
return nil, fmt.Errorf("error creating device include filters: %w", err)
}
}
if len(cfg.Exclude.Devices) > 0 {
scraper.excludeFS, err = filterset.CreateFilterSet(cfg.Exclude.Devices, &cfg.Exclude.Config)
if err != nil {
return nil, fmt.Errorf("error creating device exclude filters: %w", err)
}
}
return scraper, nil
}
// Initialize
func (s *scraper) Initialize(_ context.Context) error {
bootTime, err := s.bootTime()
if err != nil {
return err
}
s.startTime = pdata.TimestampUnixNano(bootTime * 1e9)
return s.perfCounterScraper.Initialize(logicalDisk)
}
// Close
func (s *scraper) Close(_ context.Context) error {
return nil
}
// ScrapeMetrics
func (s *scraper) ScrapeMetrics(ctx context.Context) (pdata.MetricSlice, error) {
metrics := pdata.NewMetricSlice()
now := internal.TimeToUnixNano(time.Now())
counters, err := s.perfCounterScraper.Scrape()
if err != nil {
return metrics, err
}
logicalDiskObject, err := counters.GetObject(logicalDisk)
if err != nil {
return metrics, err
}
// filter devices by name
logicalDiskObject.Filter(s.includeFS, s.excludeFS, false)
logicalDiskCounterValues, err := logicalDiskObject.GetValues(readsPerSec, writesPerSec, readBytesPerSec, writeBytesPerSec, idleTime, avgDiskSecsPerRead, avgDiskSecsPerWrite, queueLength)
if err != nil {
return metrics, err
}
if len(logicalDiskCounterValues) > 0 {
metrics.Resize(5)
initializeDiskIOMetric(metrics.At(0), s.startTime, now, logicalDiskCounterValues)
initializeDiskOpsMetric(metrics.At(1), s.startTime, now, logicalDiskCounterValues)
initializeDiskIOTimeMetric(metrics.At(2), s.startTime, now, logicalDiskCounterValues)
initializeDiskOperationTimeMetric(metrics.At(3), s.startTime, now, logicalDiskCounterValues)
initializeDiskPendingOperationsMetric(metrics.At(4), now, logicalDiskCounterValues)
}
return metrics, nil
}
func initializeDiskIOMetric(metric pdata.Metric, startTime, now pdata.TimestampUnixNano, logicalDiskCounterValues []*perfcounters.CounterValues) {
diskIODescriptor.CopyTo(metric)
idps := metric.IntSum().DataPoints()
idps.Resize(2 * len(logicalDiskCounterValues))
for idx, logicalDiskCounter := range logicalDiskCounterValues {
initializeInt64DataPoint(idps.At(2*idx+0), startTime, now, logicalDiskCounter.InstanceName, readDirectionLabelValue, logicalDiskCounter.Values[readBytesPerSec])
initializeInt64DataPoint(idps.At(2*idx+1), startTime, now, logicalDiskCounter.InstanceName, writeDirectionLabelValue, logicalDiskCounter.Values[writeBytesPerSec])
}
}
func initializeDiskOpsMetric(metric pdata.Metric, startTime, now pdata.TimestampUnixNano, logicalDiskCounterValues []*perfcounters.CounterValues) {
diskOpsDescriptor.CopyTo(metric)
idps := metric.IntSum().DataPoints()
idps.Resize(2 * len(logicalDiskCounterValues))
for idx, logicalDiskCounter := range logicalDiskCounterValues {
initializeInt64DataPoint(idps.At(2*idx+0), startTime, now, logicalDiskCounter.InstanceName, readDirectionLabelValue, logicalDiskCounter.Values[readsPerSec])
initializeInt64DataPoint(idps.At(2*idx+1), startTime, now, logicalDiskCounter.InstanceName, writeDirectionLabelValue, logicalDiskCounter.Values[writesPerSec])
}
}
func initializeDiskIOTimeMetric(metric pdata.Metric, startTime, now pdata.TimestampUnixNano, logicalDiskCounterValues []*perfcounters.CounterValues) {
diskIOTimeDescriptor.CopyTo(metric)
ddps := metric.DoubleSum().DataPoints()
ddps.Resize(len(logicalDiskCounterValues))
for idx, logicalDiskCounter := range logicalDiskCounterValues {
// disk active time = system boot time - disk idle time
initializeDoubleDataPoint(ddps.At(idx), startTime, now, logicalDiskCounter.InstanceName, "", float64(now-startTime)/1e9-float64(logicalDiskCounter.Values[idleTime])/1e7)
}
}
func initializeDiskOperationTimeMetric(metric pdata.Metric, startTime, now pdata.TimestampUnixNano, logicalDiskCounterValues []*perfcounters.CounterValues) {
diskOperationTimeDescriptor.CopyTo(metric)
ddps := metric.DoubleSum().DataPoints()
ddps.Resize(2 * len(logicalDiskCounterValues))
for idx, logicalDiskCounter := range logicalDiskCounterValues {
initializeDoubleDataPoint(ddps.At(2*idx+0), startTime, now, logicalDiskCounter.InstanceName, readDirectionLabelValue, float64(logicalDiskCounter.Values[avgDiskSecsPerRead])/1e7)
initializeDoubleDataPoint(ddps.At(2*idx+1), startTime, now, logicalDiskCounter.InstanceName, writeDirectionLabelValue, float64(logicalDiskCounter.Values[avgDiskSecsPerWrite])/1e7)
}
}
func initializeDiskPendingOperationsMetric(metric pdata.Metric, now pdata.TimestampUnixNano, logicalDiskCounterValues []*perfcounters.CounterValues) {
diskPendingOperationsDescriptor.CopyTo(metric)
idps := metric.IntSum().DataPoints()
idps.Resize(len(logicalDiskCounterValues))
for idx, logicalDiskCounter := range logicalDiskCounterValues {
initializeDiskPendingDataPoint(idps.At(idx), now, logicalDiskCounter.InstanceName, logicalDiskCounter.Values[queueLength])
}
}
func initializeInt64DataPoint(dataPoint pdata.IntDataPoint, startTime, now pdata.TimestampUnixNano, deviceLabel string, directionLabel string, value int64) {
labelsMap := dataPoint.LabelsMap()
labelsMap.Insert(deviceLabelName, deviceLabel)
if directionLabel != "" {
labelsMap.Insert(directionLabelName, directionLabel)
}
dataPoint.SetStartTime(startTime)
dataPoint.SetTimestamp(now)
dataPoint.SetValue(value)
}
func initializeDoubleDataPoint(dataPoint pdata.DoubleDataPoint, startTime, now pdata.TimestampUnixNano, deviceLabel string, directionLabel string, value float64) {
labelsMap := dataPoint.LabelsMap()
labelsMap.Insert(deviceLabelName, deviceLabel)
if directionLabel != "" {
labelsMap.Insert(directionLabelName, directionLabel)
}
dataPoint.SetStartTime(startTime)
dataPoint.SetTimestamp(now)
dataPoint.SetValue(value)
}
func initializeDiskPendingDataPoint(dataPoint pdata.IntDataPoint, now pdata.TimestampUnixNano, deviceLabel string, value int64) {
labelsMap := dataPoint.LabelsMap()
labelsMap.Insert(deviceLabelName, deviceLabel)
dataPoint.SetTimestamp(now)
dataPoint.SetValue(value)
}