95 lines
2.8 KiB
Go
95 lines
2.8 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cpuscraper
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import (
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"context"
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"time"
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"github.com/shirou/gopsutil/cpu"
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"github.com/shirou/gopsutil/host"
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"go.opentelemetry.io/collector/component"
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"go.opentelemetry.io/collector/model/pdata"
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"go.opentelemetry.io/collector/receiver/hostmetricsreceiver/internal/metadata"
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"go.opentelemetry.io/collector/receiver/scrapererror"
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)
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const metricsLen = 1
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// scraper for CPU Metrics
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type scraper struct {
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config *Config
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startTime pdata.Timestamp
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// for mocking
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bootTime func() (uint64, error)
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times func(bool) ([]cpu.TimesStat, error)
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}
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// newCPUScraper creates a set of CPU related metrics
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func newCPUScraper(_ context.Context, cfg *Config) *scraper {
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return &scraper{config: cfg, bootTime: host.BootTime, times: cpu.Times}
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}
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func (s *scraper) start(context.Context, component.Host) error {
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bootTime, err := s.bootTime()
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if err != nil {
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return err
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}
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s.startTime = pdata.Timestamp(bootTime * 1e9)
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return nil
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}
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func (s *scraper) scrape(_ context.Context) (pdata.MetricSlice, error) {
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metrics := pdata.NewMetricSlice()
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now := pdata.TimestampFromTime(time.Now())
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cpuTimes, err := s.times( /*percpu=*/ true)
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if err != nil {
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return metrics, scrapererror.NewPartialScrapeError(err, metricsLen)
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}
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metrics.Resize(metricsLen)
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initializeCPUTimeMetric(metrics.At(0), s.startTime, now, cpuTimes)
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return metrics, nil
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}
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func initializeCPUTimeMetric(metric pdata.Metric, startTime, now pdata.Timestamp, cpuTimes []cpu.TimesStat) {
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metadata.Metrics.SystemCPUTime.Init(metric)
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ddps := metric.Sum().DataPoints()
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ddps.Resize(len(cpuTimes) * cpuStatesLen)
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for i, cpuTime := range cpuTimes {
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appendCPUTimeStateDataPoints(ddps, i*cpuStatesLen, startTime, now, cpuTime)
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}
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}
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const gopsCPUTotal string = "cpu-total"
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func initializeCPUTimeDataPoint(dataPoint pdata.DoubleDataPoint, startTime, now pdata.Timestamp, cpuLabel string, stateLabel string, value float64) {
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labelsMap := dataPoint.LabelsMap()
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// ignore cpu label if reporting "total" cpu usage
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if cpuLabel != gopsCPUTotal {
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labelsMap.Insert(metadata.Labels.Cpu, cpuLabel)
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}
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labelsMap.Insert(metadata.Labels.CPUState, stateLabel)
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dataPoint.SetStartTimestamp(startTime)
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dataPoint.SetTimestamp(now)
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dataPoint.SetValue(value)
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}
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