128 lines
3.9 KiB
Go
128 lines
3.9 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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"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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)
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// A SystemCollector is a Prometheus collector for WMI metrics
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type SystemCollector struct {
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logger log.Logger
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ContextSwitchesTotal *prometheus.Desc
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ExceptionDispatchesTotal *prometheus.Desc
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ProcessorQueueLength *prometheus.Desc
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SystemCallsTotal *prometheus.Desc
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SystemUpTime *prometheus.Desc
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Threads *prometheus.Desc
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}
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// newSystemCollector ...
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func newSystemCollector(logger log.Logger) (Collector, error) {
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const subsystem = "system"
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return &SystemCollector{
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logger: log.With(logger, "collector", subsystem),
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ContextSwitchesTotal: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "context_switches_total"),
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"Total number of context switches (WMI source: PerfOS_System.ContextSwitchesPersec)",
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nil,
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nil,
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),
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ExceptionDispatchesTotal: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "exception_dispatches_total"),
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"Total number of exceptions dispatched (WMI source: PerfOS_System.ExceptionDispatchesPersec)",
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nil,
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nil,
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),
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ProcessorQueueLength: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "processor_queue_length"),
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"Length of processor queue (WMI source: PerfOS_System.ProcessorQueueLength)",
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nil,
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nil,
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),
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SystemCallsTotal: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "system_calls_total"),
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"Total number of system calls (WMI source: PerfOS_System.SystemCallsPersec)",
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nil,
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nil,
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),
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SystemUpTime: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "system_up_time"),
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"System boot time (WMI source: PerfOS_System.SystemUpTime)",
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nil,
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nil,
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),
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Threads: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "threads"),
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"Current number of threads (WMI source: PerfOS_System.Threads)",
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nil,
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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 *SystemCollector) Collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) error {
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if desc, err := c.collect(ctx, ch); err != nil {
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_ = level.Error(c.logger).Log("failed collecting system 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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// Win32_PerfRawData_PerfOS_System docs:
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// - https://web.archive.org/web/20050830140516/http://msdn.microsoft.com/library/en-us/wmisdk/wmi/win32_perfrawdata_perfos_system.asp
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type system struct {
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ContextSwitchesPersec float64 `perflib:"Context Switches/sec"`
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ExceptionDispatchesPersec float64 `perflib:"Exception Dispatches/sec"`
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ProcessorQueueLength float64 `perflib:"Processor Queue Length"`
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SystemCallsPersec float64 `perflib:"System Calls/sec"`
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SystemUpTime float64 `perflib:"System Up Time"`
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Threads float64 `perflib:"Threads"`
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}
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func (c *SystemCollector) collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
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var dst []system
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if err := unmarshalObject(ctx.perfObjects["System"], &dst, c.logger); err != nil {
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return nil, err
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}
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ch <- prometheus.MustNewConstMetric(
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c.ContextSwitchesTotal,
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prometheus.CounterValue,
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dst[0].ContextSwitchesPersec,
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)
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ch <- prometheus.MustNewConstMetric(
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c.ExceptionDispatchesTotal,
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prometheus.CounterValue,
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dst[0].ExceptionDispatchesPersec,
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)
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ch <- prometheus.MustNewConstMetric(
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c.ProcessorQueueLength,
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prometheus.GaugeValue,
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dst[0].ProcessorQueueLength,
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)
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ch <- prometheus.MustNewConstMetric(
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c.SystemCallsTotal,
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prometheus.CounterValue,
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dst[0].SystemCallsPersec,
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)
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ch <- prometheus.MustNewConstMetric(
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c.SystemUpTime,
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prometheus.GaugeValue,
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dst[0].SystemUpTime,
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)
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ch <- prometheus.MustNewConstMetric(
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c.Threads,
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prometheus.GaugeValue,
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dst[0].Threads,
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)
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return nil, nil
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}
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