mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-02-12 07:56:38 +00:00
baba51bc6a
This can be useful for building grafana dashboards with dropdowns for multiple hosts Or for managed instances of Prometheus where the user is not able to add labels via config
113 lines
2.6 KiB
Go
113 lines
2.6 KiB
Go
// +build windows
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package collector
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import (
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"errors"
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"github.com/StackExchange/wmi"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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)
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func init() {
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Factories["cs"] = NewCSCollector
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}
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// A CSCollector is a Prometheus collector for WMI metrics
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type CSCollector struct {
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PhysicalMemoryBytes *prometheus.Desc
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LogicalProcessors *prometheus.Desc
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Hostname *prometheus.Desc
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}
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// NewCSCollector ...
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func NewCSCollector() (Collector, error) {
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const subsystem = "cs"
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return &CSCollector{
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LogicalProcessors: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "logical_processors"),
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"ComputerSystem.NumberOfLogicalProcessors",
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nil,
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nil,
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),
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PhysicalMemoryBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "physical_memory_bytes"),
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"ComputerSystem.TotalPhysicalMemory",
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nil,
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nil,
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),
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Hostname: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "hostname"),
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"Labeled system hostname information as provided by ComputerSystem.DNSHostName and ComputerSystem.Domain",
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[]string{
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"hostname",
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"domain",
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"fqdn"},
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nil,
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),
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}, nil
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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 *CSCollector) Collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) error {
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if desc, err := c.collect(ch); err != nil {
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log.Error("failed collecting cs metrics:", desc, 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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// Win32_ComputerSystem docs:
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// - https://msdn.microsoft.com/en-us/library/aa394102
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type Win32_ComputerSystem struct {
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NumberOfLogicalProcessors uint32
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TotalPhysicalMemory uint64
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DNSHostname string
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Domain string
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Workgroup string
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}
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func (c *CSCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
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var dst []Win32_ComputerSystem
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q := queryAll(&dst)
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if err := wmi.Query(q, &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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ch <- prometheus.MustNewConstMetric(
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c.LogicalProcessors,
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prometheus.GaugeValue,
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float64(dst[0].NumberOfLogicalProcessors),
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)
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ch <- prometheus.MustNewConstMetric(
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c.PhysicalMemoryBytes,
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prometheus.GaugeValue,
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float64(dst[0].TotalPhysicalMemory),
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)
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var fqdn string
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if dst[0].Domain != dst[0].Workgroup {
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fqdn = dst[0].DNSHostname + "." + dst[0].Domain
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} else {
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fqdn = dst[0].DNSHostname
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}
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ch <- prometheus.MustNewConstMetric(
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c.Hostname,
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prometheus.GaugeValue,
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1.0,
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dst[0].DNSHostname,
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dst[0].Domain,
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fqdn,
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)
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return nil, nil
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}
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