100 lines
2.8 KiB
Go
100 lines
2.8 KiB
Go
//go:build windows
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// +build windows
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package collector
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import (
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"errors"
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"strconv"
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"strings"
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"github.com/go-kit/log"
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"github.com/go-kit/log/level"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/yusufpapurcu/wmi"
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)
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// If you are adding additional labels to the metric, make sure that they get added in here as well. See below for explanation.
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const (
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win32ProcessorQuery = "SELECT Architecture, DeviceId, Description, Family, L2CacheSize, L3CacheSize, Name FROM Win32_Processor"
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)
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// A CpuInfoCollector is a Prometheus collector for a few WMI metrics in Win32_Processor
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type CpuInfoCollector struct {
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logger log.Logger
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CpuInfo *prometheus.Desc
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}
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func newCpuInfoCollector(logger log.Logger) (Collector, error) {
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const subsystem = "cpu_info"
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return &CpuInfoCollector{
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logger: log.With(logger, "collector", subsystem),
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CpuInfo: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "", subsystem),
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"Labeled CPU information as provided provided by Win32_Processor",
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[]string{
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"architecture",
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"device_id",
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"description",
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"family",
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"l2_cache_size",
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"l3_cache_size",
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"name"},
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nil,
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),
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}, nil
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}
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type win32_Processor struct {
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Architecture uint32
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DeviceID string
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Description string
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Family uint16
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L2CacheSize uint32
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L3CacheSize uint32
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Name string
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}
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// Collect sends the metric values for each metric
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// to the provided prometheus Metric channel.
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func (c *CpuInfoCollector) Collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) error {
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if desc, err := c.collect(ch); err != nil {
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_ = level.Error(c.logger).Log("msg", "failed collecting cpu_info metrics", "desc", desc, "err", err)
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return err
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}
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return nil
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}
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func (c *CpuInfoCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
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var dst []win32_Processor
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// We use a static query here because the provided methods in wmi.go all issue a SELECT *;
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// This results in the time consuming LoadPercentage field being read which seems to measure each CPU
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// serially over a 1 second interval, so the scrape time is at least 1s * num_sockets
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if err := wmi.Query(win32ProcessorQuery, &dst); err != nil {
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return nil, err
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}
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if len(dst) == 0 {
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return nil, errors.New("WMI query returned empty result set")
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}
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// Some CPUs end up exposing trailing spaces for certain strings, so clean them up
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for _, processor := range dst {
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ch <- prometheus.MustNewConstMetric(
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c.CpuInfo,
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prometheus.GaugeValue,
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1.0,
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strconv.Itoa(int(processor.Architecture)),
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strings.TrimRight(processor.DeviceID, " "),
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strings.TrimRight(processor.Description, " "),
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strconv.Itoa(int(processor.Family)),
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strconv.Itoa(int(processor.L2CacheSize)),
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strconv.Itoa(int(processor.L3CacheSize)),
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strings.TrimRight(processor.Name, " "),
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)
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}
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return nil, nil
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}
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