137 lines
3.1 KiB
Go
137 lines
3.1 KiB
Go
// returns data points from Win32_Service
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// https://msdn.microsoft.com/en-us/library/aa394418(v=vs.85).aspx - Win32_Service class
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package collector
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import (
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"bytes"
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"strings"
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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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"gopkg.in/alecthomas/kingpin.v2"
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)
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func init() {
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Factories["service"] = NewserviceCollector
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}
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var (
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serviceWhereClause = kingpin.Flag(
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"collector.service.services-where",
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"WQL 'where' clause to use in WMI metrics query. Limits the response to the services you specify and reduces the size of the response.",
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).Default("").String()
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)
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// A serviceCollector is a Prometheus collector for WMI Win32_Service metrics
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type serviceCollector struct {
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State *prometheus.Desc
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StartMode *prometheus.Desc
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queryWhereClause string
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}
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// NewserviceCollector ...
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func NewserviceCollector() (Collector, error) {
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const subsystem = "service"
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var wc bytes.Buffer
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if *serviceWhereClause != "" {
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wc.WriteString("WHERE ")
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wc.WriteString(*serviceWhereClause)
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} else {
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log.Warn("No where-clause specified for service collector. This will generate a very large number of metrics!")
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}
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return &serviceCollector{
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State: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "state"),
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"The state of the service (State)",
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[]string{"name", "state"},
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nil,
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),
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StartMode: prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, subsystem, "start_mode"),
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"The start mode of the service (StartMode)",
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[]string{"name", "start_mode"},
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nil,
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),
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queryWhereClause: wc.String(),
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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 *serviceCollector) Collect(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 service 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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type Win32_Service struct {
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Name string
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State string
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StartMode string
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}
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var (
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allStates = []string{
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"stopped",
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"start pending",
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"stop pending",
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"running",
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"continue pending",
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"pause pending",
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"paused",
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"unknown",
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}
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allStartModes = []string{
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"boot",
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"system",
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"auto",
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"manual",
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"disabled",
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}
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)
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func (c *serviceCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
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var dst []Win32_Service
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q := wmi.CreateQuery(&dst, c.queryWhereClause)
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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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for _, service := range dst {
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for _, state := range allStates {
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isCurrentState := 0.0
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if state == strings.ToLower(service.State) {
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isCurrentState = 1.0
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}
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ch <- prometheus.MustNewConstMetric(
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c.State,
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prometheus.GaugeValue,
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isCurrentState,
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strings.ToLower(service.Name),
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state,
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)
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}
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for _, startMode := range allStartModes {
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isCurrentStartMode := 0.0
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if startMode == strings.ToLower(service.StartMode) {
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isCurrentStartMode = 1.0
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}
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ch <- prometheus.MustNewConstMetric(
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c.StartMode,
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prometheus.GaugeValue,
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isCurrentStartMode,
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strings.ToLower(service.Name),
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startMode,
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)
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}
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}
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return nil, nil
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}
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