323 lines
8.2 KiB
Go
323 lines
8.2 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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"fmt"
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"os"
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"strings"
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"time"
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"github.com/prometheus-community/windows_exporter/headers/netapi32"
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"github.com/prometheus-community/windows_exporter/headers/psapi"
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"github.com/prometheus-community/windows_exporter/headers/sysinfoapi"
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"github.com/prometheus-community/windows_exporter/log"
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"github.com/prometheus/client_golang/prometheus"
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"golang.org/x/sys/windows/registry"
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)
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func init() {
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registerCollector("os", NewOSCollector, "Paging File")
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}
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// A OSCollector is a Prometheus collector for WMI metrics
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type OSCollector struct {
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OSInformation *prometheus.Desc
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PhysicalMemoryFreeBytes *prometheus.Desc
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PagingFreeBytes *prometheus.Desc
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VirtualMemoryFreeBytes *prometheus.Desc
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ProcessesLimit *prometheus.Desc
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ProcessMemoryLimitBytes *prometheus.Desc
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Processes *prometheus.Desc
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Users *prometheus.Desc
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PagingLimitBytes *prometheus.Desc
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VirtualMemoryBytes *prometheus.Desc
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VisibleMemoryBytes *prometheus.Desc
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Time *prometheus.Desc
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Timezone *prometheus.Desc
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}
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type pagingFileCounter struct {
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Name string
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Usage float64 `perflib:"% Usage"`
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UsagePeak float64 `perflib:"% Usage Peak"`
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}
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// NewOSCollector ...
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func NewOSCollector() (Collector, error) {
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const subsystem = "os"
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return &OSCollector{
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OSInformation: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "info"),
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"OperatingSystem.Caption, OperatingSystem.Version",
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[]string{"product", "version"},
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nil,
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),
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PagingLimitBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "paging_limit_bytes"),
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"OperatingSystem.SizeStoredInPagingFiles",
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nil,
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nil,
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),
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PagingFreeBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "paging_free_bytes"),
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"OperatingSystem.FreeSpaceInPagingFiles",
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nil,
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nil,
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),
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PhysicalMemoryFreeBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "physical_memory_free_bytes"),
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"OperatingSystem.FreePhysicalMemory",
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nil,
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nil,
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),
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Time: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "time"),
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"OperatingSystem.LocalDateTime",
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nil,
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nil,
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),
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Timezone: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "timezone"),
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"OperatingSystem.LocalDateTime",
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[]string{"timezone"},
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nil,
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),
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Processes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "processes"),
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"OperatingSystem.NumberOfProcesses",
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nil,
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nil,
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),
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ProcessesLimit: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "processes_limit"),
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"OperatingSystem.MaxNumberOfProcesses",
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nil,
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nil,
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),
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ProcessMemoryLimitBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "process_memory_limit_bytes"),
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"OperatingSystem.MaxProcessMemorySize",
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nil,
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nil,
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),
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Users: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "users"),
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"OperatingSystem.NumberOfUsers",
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nil,
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nil,
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),
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VirtualMemoryBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "virtual_memory_bytes"),
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"OperatingSystem.TotalVirtualMemorySize",
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nil,
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nil,
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),
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VisibleMemoryBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "visible_memory_bytes"),
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"OperatingSystem.TotalVisibleMemorySize",
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nil,
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nil,
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),
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VirtualMemoryFreeBytes: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "virtual_memory_free_bytes"),
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"OperatingSystem.FreeVirtualMemory",
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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 *OSCollector) 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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log.Error("failed collecting os 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_OperatingSystem docs:
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// - https://msdn.microsoft.com/en-us/library/aa394239 - Win32_OperatingSystem class
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type Win32_OperatingSystem struct {
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Caption string
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FreePhysicalMemory uint64
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FreeSpaceInPagingFiles uint64
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FreeVirtualMemory uint64
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LocalDateTime time.Time
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MaxNumberOfProcesses uint32
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MaxProcessMemorySize uint64
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NumberOfProcesses uint32
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NumberOfUsers uint32
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SizeStoredInPagingFiles uint64
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TotalVirtualMemorySize uint64
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TotalVisibleMemorySize uint64
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Version string
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}
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func (c *OSCollector) collect(ctx *ScrapeContext, ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
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nwgi, err := netapi32.GetWorkstationInfo()
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if err != nil {
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return nil, err
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}
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gmse, err := sysinfoapi.GlobalMemoryStatusEx()
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if err != nil {
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return nil, err
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}
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currentTime := time.Now()
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timezoneName, _ := currentTime.Zone()
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// Get total allocation of paging files across all disks.
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memManKey, err := registry.OpenKey(registry.LOCAL_MACHINE, `SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management`, registry.QUERY_VALUE)
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defer memManKey.Close()
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if err != nil {
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return nil, err
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}
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pagingFiles, _, err := memManKey.GetStringsValue("ExistingPageFiles")
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if err != nil {
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return nil, err
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}
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// Get build number and product name from registry
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ntKey, err := registry.OpenKey(registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows NT\CurrentVersion`, registry.QUERY_VALUE)
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defer ntKey.Close()
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if err != nil {
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return nil, err
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}
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pn, _, err := ntKey.GetStringValue("ProductName")
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if err != nil {
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return nil, err
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}
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bn, _, err := ntKey.GetStringValue("CurrentBuildNumber")
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if err != nil {
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return nil, err
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}
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var fsipf float64
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for _, pagingFile := range pagingFiles {
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fileString := strings.ReplaceAll(pagingFile, `\??\`, "")
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file, err := os.Stat(fileString)
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if err != nil {
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return nil, err
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}
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fsipf += float64(file.Size())
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}
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gpi, err := psapi.GetPerformanceInfo()
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if err != nil {
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return nil, err
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}
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var pfc = make([]pagingFileCounter, 0)
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if err := unmarshalObject(ctx.perfObjects["Paging File"], &pfc); err != nil {
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return nil, err
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}
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// Get current page file usage.
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var pfbRaw float64
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for _, pageFile := range pfc {
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if strings.Contains(strings.ToLower(pageFile.Name), "_total") {
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continue
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}
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pfbRaw += pageFile.Usage
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}
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// Subtract from total page file allocation on disk.
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pfb := fsipf - (pfbRaw * float64(gpi.PageSize))
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ch <- prometheus.MustNewConstMetric(
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c.OSInformation,
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prometheus.GaugeValue,
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1.0,
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fmt.Sprintf("Microsoft %s", pn), // Caption
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fmt.Sprintf("%d.%d.%s", nwgi.VersionMajor, nwgi.VersionMinor, bn), // Version
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)
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ch <- prometheus.MustNewConstMetric(
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c.PhysicalMemoryFreeBytes,
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prometheus.GaugeValue,
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float64(gmse.AvailPhys),
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)
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ch <- prometheus.MustNewConstMetric(
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c.Time,
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prometheus.GaugeValue,
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float64(currentTime.Unix()),
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)
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ch <- prometheus.MustNewConstMetric(
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c.Timezone,
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prometheus.GaugeValue,
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1.0,
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timezoneName,
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)
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ch <- prometheus.MustNewConstMetric(
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c.PagingFreeBytes,
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prometheus.GaugeValue,
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pfb,
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)
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ch <- prometheus.MustNewConstMetric(
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c.VirtualMemoryFreeBytes,
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prometheus.GaugeValue,
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float64(gmse.AvailPageFile),
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)
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// Windows has no defined limit, and is based off available resources. This currently isn't calculated by WMI and is set to default value.
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// https://techcommunity.microsoft.com/t5/windows-blog-archive/pushing-the-limits-of-windows-processes-and-threads/ba-p/723824
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// https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/win32-operatingsystem
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ch <- prometheus.MustNewConstMetric(
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c.ProcessesLimit,
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prometheus.GaugeValue,
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float64(4294967295),
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)
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ch <- prometheus.MustNewConstMetric(
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c.ProcessMemoryLimitBytes,
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prometheus.GaugeValue,
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float64(gmse.TotalVirtual),
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)
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ch <- prometheus.MustNewConstMetric(
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c.Processes,
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prometheus.GaugeValue,
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float64(gpi.ProcessCount),
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)
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ch <- prometheus.MustNewConstMetric(
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c.Users,
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prometheus.GaugeValue,
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float64(nwgi.LoggedOnUsers),
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)
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ch <- prometheus.MustNewConstMetric(
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c.PagingLimitBytes,
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prometheus.GaugeValue,
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fsipf,
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)
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ch <- prometheus.MustNewConstMetric(
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c.VirtualMemoryBytes,
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prometheus.GaugeValue,
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float64(gmse.TotalPageFile),
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)
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ch <- prometheus.MustNewConstMetric(
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c.VisibleMemoryBytes,
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prometheus.GaugeValue,
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float64(gmse.TotalPhys),
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)
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return nil, nil
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}
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