install.ps1: fix wix download url

Add Win32_Service collector

README.md

@@ -16,6 +16,7 @@ iis | [Win32_PerfRawData_W3SVC_WebService](https://msdn.microsoft.com/en-us/libr
 logical_disk | [Win32_PerfRawData_PerfDisk_LogicalDisk](https://msdn.microsoft.com/en-us/windows/hardware/aa394307(v=vs.71)) metrics (disk I/O) | ✓
 net | [Win32_PerfRawData_Tcpip_NetworkInterface](https://technet.microsoft.com/en-us/security/aa394340(v=vs.80)) metrics (network interface I/O) | ✓
 os | [Win32_OperatingSystem](https://msdn.microsoft.com/en-us/library/aa394239) metrics (memory, processes, users) | ✓
+service | [Win32_Service](https://msdn.microsoft.com/en-us/library/aa394418(v=vs.85).aspx) metrics (service states) | ✓
 system | Win32_PerfRawData_PerfOS_System metrics (system calls) | ✓
 
 The HELP texts shows the WMI data source, please see MSDN documentation for details.

collector/service.go

@@ -0,0 +1,83 @@
+// returns data points from Win32_Service
+// https://msdn.microsoft.com/en-us/library/aa394418(v=vs.85).aspx - Win32_Service class
+package collector
+
+import (
+	"log"
+	"strings"
+
+	"github.com/StackExchange/wmi"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+func init() {
+	Factories["service"] = NewserviceCollector
+}
+
+// A serviceCollector is a Prometheus collector for WMI Win32_Service metrics
+type serviceCollector struct {
+	State     *prometheus.Desc
+	StartMode *prometheus.Desc
+}
+
+// NewserviceCollector ...
+func NewserviceCollector() (Collector, error) {
+	const subsystem = "service"
+	return &serviceCollector{
+		State: prometheus.NewDesc(
+			prometheus.BuildFQName(Namespace, subsystem, "state"),
+			"The state of the service (State)",
+			[]string{"name", "state"},
+			nil,
+		),
+		StartMode: prometheus.NewDesc(
+			prometheus.BuildFQName(Namespace, subsystem, "start_mode"),
+			"The start mode of the service (StartMode)",
+			[]string{"name", "start_mode"},
+			nil,
+		),
+	}, nil
+}
+
+// Collect sends the metric values for each metric
+// to the provided prometheus Metric channel.
+func (c *serviceCollector) Collect(ch chan<- prometheus.Metric) error {
+	if desc, err := c.collect(ch); err != nil {
+		log.Println("[ERROR] failed collecting service metrics:", desc, err)
+		return err
+	}
+	return nil
+}
+
+type Win32_Service struct {
+	Name      string
+	State     string
+	StartMode string
+}
+
+func (c *serviceCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
+	var dst []Win32_Service
+	q := wmi.CreateQuery(&dst, "")
+	if err := wmi.Query(q, &dst); err != nil {
+		return nil, err
+	}
+
+	for _, service := range dst {
+		ch <- prometheus.MustNewConstMetric(
+			c.State,
+			prometheus.GaugeValue,
+			1.0,
+			strings.ToLower(service.Name),
+			strings.ToLower(service.State),
+		)
+
+		ch <- prometheus.MustNewConstMetric(
+			c.StartMode,
+			prometheus.GaugeValue,
+			1.0,
+			strings.ToLower(service.Name),
+			strings.ToLower(service.StartMode),
+		)
+	}
+	return nil, nil
+}

exporter.go

@@ -25,7 +25,7 @@ type WmiCollector struct {
 }
 
 const (
-	defaultCollectors = "cpu,cs,logical_disk,net,os,system"
+	defaultCollectors = "cpu,cs,logical_disk,net,os,service,system"
 	serviceName       = "wmi_exporter"
 )
 

installer/build.ps1

@@ -45,7 +45,7 @@ mkdir -Force Work,Output | Out-Null
 Write-Verbose "Downloading files"
 # Somewhat obscure url, points to WiX 3.10 binary release
 Write-Verbose "Downloading WiX..."
-Get-FileIfNotExists "http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=wix&DownloadId=1504735&FileTime=130906491728530000&Build=21031" "$sourceDir\wix-binaries.zip"
+Get-FileIfNotExists "http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=wix&DownloadId=1504735&FileTime=130906491728530000&Build=21040" "$sourceDir\wix-binaries.zip"
 mkdir -Force WiX | Out-Null
 Expand-Archive -Path "${sourceDir}\wix-binaries.zip" -DestinationPath WiX -Force
 

tools/collector-generator/New-Collector.ps1

@@ -2,9 +2,22 @@ Param(
     [Parameter(Mandatory=$true)]
     $Class,
     [Parameter(Mandatory=$false)]
-    $CollectorName = ($Class -replace 'Win32_PerfRawData_Perf','')
+    $CollectorName = ($Class -replace 'Win32_PerfRawData_Perf',''),
+    [Parameter(Mandatory=$false)]
+    $ComputerName = "localhost",
+    [Parameter(Mandatory=$false)]
+    $Credential
 )
-$members = Get-WMIObject $Class `
+$ErrorActionPreference = "Stop"
+
+if($Credential -ne $null) {
+    $wmiObject = Get-WMIObject -ComputerName $ComputerName -Credential $Credential -Class $Class
+}
+else {
+    $wmiObject = Get-WMIObject -ComputerName $ComputerName -Class $Class
+}
+
+$members = $wmiObject `
     | Get-Member -MemberType Properties `
     | Where-Object { $_.Definition -Match '^u?int' -and $_.Name -NotMatch '_' } `
     | Select-Object Name, @{Name="Type";Expression={$_.Definition.Split(" ")[0]}}