system: Metric windows_system_boot_time_timestamp returns a UNIX timestamp again. (#1967)

Signed-off-by: Jan-Otto Kröpke <mail@jkroepke.de>
Signed-off-by: Jan-Otto Kröpke <github@jkroepke.de>

docs/collector.system.md

@@ -16,7 +16,7 @@ None
 
 | Name                                         | Description                                                                                                                                                                                                       | Type    | Labels |
 |----------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------|--------|
-| `windows_system_boot_time_timestamp_seconds` | Unix timestamp of last system boot                                                                                                                                                                                | gauge   | None   |
+| `windows_system_boot_time_timestamp`         | Unix timestamp of last system boot                                                                                                                                                                                | gauge   | None   |
 | `windows_system_context_switches_total`      | Total number of [context switches](https://en.wikipedia.org/wiki/Context_switch)                                                                                                                                  | counter | None   |
 | `windows_system_exception_dispatches_total`  | Total exceptions dispatched by the system                                                                                                                                                                         | counter | None   |
 | `windows_system_processes`                   | Number of process contexts currently loaded or running on the operating system                                                                                                                                    | gauge   | None   |
@@ -41,7 +41,7 @@ windows_system_processes{instance="localhost"}
 ## Useful queries
 Find hosts that have rebooted in the last 24 hours
 ```
-time() - windows_system_boot_time_timestamp_seconds < 86400
+time() - windows_system_boot_time_timestamp < 86400
 ```
 
 ## Alerting examples

internal/collector/system/system.go

@@ -20,8 +20,10 @@ package system
 import (
 	"fmt"
 	"log/slog"
+	"time"
 
 	"github.com/alecthomas/kingpin/v2"
+	"github.com/prometheus-community/windows_exporter/internal/headers/kernel32"
 	"github.com/prometheus-community/windows_exporter/internal/mi"
 	"github.com/prometheus-community/windows_exporter/internal/pdh"
 	"github.com/prometheus-community/windows_exporter/internal/types"
@@ -39,6 +41,8 @@ var ConfigDefaults = Config{}
 type Collector struct {
 	config Config
 
+	bootTimeTimestamp float64
+
 	perfDataCollector *pdh.Collector
 	perfDataObject    []perfDataCounterValues
 
@@ -48,8 +52,10 @@ type Collector struct {
 	processes                *prometheus.Desc
 	processesLimit           *prometheus.Desc
 	systemCallsTotal         *prometheus.Desc
-	bootTime                 *prometheus.Desc
+	// Deprecated: Use windows_system_boot_time_timestamp instead
-	threads                  *prometheus.Desc
+	bootTimeSeconds *prometheus.Desc
+	bootTime        *prometheus.Desc
+	threads         *prometheus.Desc
 }
 
 func New(config *Config) *Collector {
@@ -80,11 +86,17 @@ func (c *Collector) Close() error {
 
 func (c *Collector) Build(_ *slog.Logger, _ *mi.Session) error {
 	c.bootTime = prometheus.NewDesc(
-		prometheus.BuildFQName(types.Namespace, Name, "boot_time_timestamp_seconds"),
+		prometheus.BuildFQName(types.Namespace, Name, "boot_time_timestamp"),
 		"Unix timestamp of system boot time",
 		nil,
 		nil,
 	)
+	c.bootTimeSeconds = prometheus.NewDesc(
+		prometheus.BuildFQName(types.Namespace, Name, "boot_time_timestamp_seconds"),
+		"Deprecated: Use windows_system_boot_time_timestamp instead",
+		nil,
+		nil,
+	)
 	c.contextSwitchesTotal = prometheus.NewDesc(
 		prometheus.BuildFQName(types.Namespace, Name, "context_switches_total"),
 		"Total number of context switches (WMI source: PerfOS_System.ContextSwitchesPersec)",
@@ -129,6 +141,8 @@ func (c *Collector) Build(_ *slog.Logger, _ *mi.Session) error {
 		nil,
 	)
 
+	c.bootTimeTimestamp = float64(time.Now().Unix() - int64(kernel32.GetTickCount64()/1000))
+
 	var err error
 
 	c.perfDataCollector, err = pdh.NewCollector[perfDataCounterValues](pdh.CounterTypeRaw, "System", nil)
@@ -172,17 +186,24 @@ func (c *Collector) Collect(ch chan<- prometheus.Metric) error {
 		prometheus.CounterValue,
 		c.perfDataObject[0].SystemCallsPerSec,
 	)
-	ch <- prometheus.MustNewConstMetric(
-		c.bootTime,
-		prometheus.GaugeValue,
-		c.perfDataObject[0].SystemUpTime,
-	)
 	ch <- prometheus.MustNewConstMetric(
 		c.threads,
 		prometheus.GaugeValue,
 		c.perfDataObject[0].Threads,
 	)
 
+	ch <- prometheus.MustNewConstMetric(
+		c.bootTimeSeconds,
+		prometheus.GaugeValue,
+		c.bootTimeTimestamp,
+	)
+
+	ch <- prometheus.MustNewConstMetric(
+		c.bootTime,
+		prometheus.GaugeValue,
+		c.bootTimeTimestamp,
+	)
+
 	// Windows has no defined limit, and is based off available resources. This currently isn't calculated by WMI and is set to default value.
 	// https://techcommunity.microsoft.com/t5/windows-blog-archive/pushing-the-limits-of-windows-processes-and-threads/ba-p/723824
 	// https://docs.microsoft.com/en-us/windows/win32/cimwin32prov/win32-operatingsystem

internal/collector/system/types.go

@@ -22,7 +22,6 @@ type perfDataCounterValues struct {
 	ExceptionDispatchesPerSec float64 `perfdata:"Exception Dispatches/sec"`
 	ProcessorQueueLength      float64 `perfdata:"Processor Queue Length"`
 	SystemCallsPerSec         float64 `perfdata:"System Calls/sec"`
-	SystemUpTime              float64 `perfdata:"System Up Time"`
 	Processes                 float64 `perfdata:"Processes"`
 	Threads                   float64 `perfdata:"Threads"`
 }

internal/headers/kernel32/kernel32.go

@@ -25,10 +25,11 @@ import (
 
 //nolint:gochecknoglobals
 var (
-	kernel32 = windows.NewLazySystemDLL("kernel32.dll")
+	modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
 
-	procGetDynamicTimeZoneInformationSys = kernel32.NewProc("GetDynamicTimeZoneInformation")
+	procGetDynamicTimeZoneInformationSys = modkernel32.NewProc("GetDynamicTimeZoneInformation")
-	kernelLocalFileTimeToFileTime        = kernel32.NewProc("LocalFileTimeToFileTime")
+	procKernelLocalFileTimeToFileTime    = modkernel32.NewProc("LocalFileTimeToFileTime")
+	procGetTickCount                     = modkernel32.NewProc("GetTickCount64")
 )
 
 // SYSTEMTIME contains a date and time.
@@ -72,9 +73,15 @@ func GetDynamicTimeZoneInformation() (DynamicTimezoneInformation, error) {
 }
 
 func LocalFileTimeToFileTime(localFileTime, utcFileTime *windows.Filetime) uint32 {
-	ret, _, _ := kernelLocalFileTimeToFileTime.Call(
+	ret, _, _ := procKernelLocalFileTimeToFileTime.Call(
 		uintptr(unsafe.Pointer(localFileTime)),
 		uintptr(unsafe.Pointer(utcFileTime)))
 
 	return uint32(ret)
 }
+
+func GetTickCount64() uint64 {
+	ret, _, _ := procGetTickCount.Call()
+
+	return uint64(ret)
+}

tools/e2e-output.txt

@@ -393,7 +393,9 @@ windows_service_state{name="Themes",state="running"} 1
 windows_service_state{name="Themes",state="start pending"} 0
 windows_service_state{name="Themes",state="stop pending"} 0
 windows_service_state{name="Themes",state="stopped"} 0
-# HELP windows_system_boot_time_timestamp_seconds Unix timestamp of system boot time
+# HELP windows_system_boot_time_timestamp Unix timestamp of system boot time
+# TYPE windows_system_boot_time_timestamp gauge
+# HELP windows_system_boot_time_timestamp_seconds Deprecated: Use windows_system_boot_time_timestamp instead
 # TYPE windows_system_boot_time_timestamp_seconds gauge
 # HELP windows_system_context_switches_total Total number of context switches (WMI source: PerfOS_System.ContextSwitchesPersec)
 # TYPE windows_system_context_switches_total counter