mirror of
https://github.com/prometheus-community/windows_exporter
synced 2024-12-22 22:42:14 +00:00
271 lines
7.4 KiB
Go
271 lines
7.4 KiB
Go
// Copyright 2024 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build windows
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package time
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import (
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"errors"
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"fmt"
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"log/slog"
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"slices"
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"strings"
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"time"
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"github.com/alecthomas/kingpin/v2"
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"github.com/prometheus-community/windows_exporter/internal/headers/kernel32"
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"github.com/prometheus-community/windows_exporter/internal/mi"
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"github.com/prometheus-community/windows_exporter/internal/pdh"
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"github.com/prometheus-community/windows_exporter/internal/types"
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"github.com/prometheus/client_golang/prometheus"
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"golang.org/x/sys/windows"
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)
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const (
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Name = "time"
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collectorSystemTime = "system_time"
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collectorNTP = "ntp"
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)
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type Config struct {
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CollectorsEnabled []string `yaml:"collectors_enabled"`
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}
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//nolint:gochecknoglobals
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var ConfigDefaults = Config{
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CollectorsEnabled: []string{
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collectorSystemTime,
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collectorNTP,
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},
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}
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// Collector is a Prometheus Collector for Perflib counter metrics.
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type Collector struct {
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config Config
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perfDataCollector *pdh.Collector
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perfDataObject []perfDataCounterValues
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currentTime *prometheus.Desc
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timezone *prometheus.Desc
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clockFrequencyAdjustmentPPBTotal *prometheus.Desc
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computedTimeOffset *prometheus.Desc
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ntpClientTimeSourceCount *prometheus.Desc
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ntpRoundTripDelay *prometheus.Desc
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ntpServerIncomingRequestsTotal *prometheus.Desc
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ntpServerOutgoingResponsesTotal *prometheus.Desc
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}
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func New(config *Config) *Collector {
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if config == nil {
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config = &ConfigDefaults
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}
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if config.CollectorsEnabled == nil {
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config.CollectorsEnabled = ConfigDefaults.CollectorsEnabled
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}
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c := &Collector{
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config: *config,
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}
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return c
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}
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func NewWithFlags(app *kingpin.Application) *Collector {
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c := &Collector{
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config: ConfigDefaults,
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}
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c.config.CollectorsEnabled = make([]string, 0)
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var collectorsEnabled string
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app.Flag(
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"collector.time.enabled",
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"Comma-separated list of collectors to use. Defaults to all, if not specified. ntp may not available on all systems.",
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).Default(strings.Join(ConfigDefaults.CollectorsEnabled, ",")).StringVar(&collectorsEnabled)
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app.Action(func(*kingpin.ParseContext) error {
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c.config.CollectorsEnabled = strings.Split(collectorsEnabled, ",")
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return nil
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})
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return c
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}
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func (c *Collector) GetName() string {
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return Name
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}
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func (c *Collector) Close() error {
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if slices.Contains(c.config.CollectorsEnabled, collectorNTP) {
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c.perfDataCollector.Close()
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}
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return nil
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}
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func (c *Collector) Build(_ *slog.Logger, _ *mi.Session) error {
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for _, collector := range c.config.CollectorsEnabled {
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if !slices.Contains([]string{collectorSystemTime, collectorNTP}, collector) {
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return fmt.Errorf("unknown collector: %s", collector)
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}
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}
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var err error
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c.perfDataCollector, err = pdh.NewCollector[perfDataCounterValues]("Windows Time Service", nil)
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if err != nil {
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return fmt.Errorf("failed to create Windows Time Service collector: %w", err)
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}
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c.currentTime = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "current_timestamp_seconds"),
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"OperatingSystem.LocalDateTime",
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nil,
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nil,
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)
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c.timezone = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "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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c.clockFrequencyAdjustmentPPBTotal = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "clock_frequency_adjustment_ppb_total"),
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"Total adjustment made to the local system clock frequency by W32Time in Parts Per Billion (PPB) units.",
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nil,
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nil,
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)
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c.computedTimeOffset = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "computed_time_offset_seconds"),
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"Absolute time offset between the system clock and the chosen time source, in seconds",
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nil,
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nil,
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)
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c.ntpClientTimeSourceCount = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "ntp_client_time_sources"),
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"Active number of NTP Time sources being used by the client",
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nil,
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nil,
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)
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c.ntpRoundTripDelay = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "ntp_round_trip_delay_seconds"),
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"Roundtrip delay experienced by the NTP client in receiving a response from the server for the most recent request, in seconds",
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nil,
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nil,
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)
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c.ntpServerOutgoingResponsesTotal = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "ntp_server_outgoing_responses_total"),
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"Total number of requests responded to by NTP server",
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nil,
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nil,
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)
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c.ntpServerIncomingRequestsTotal = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "ntp_server_incoming_requests_total"),
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"Total number of requests received by NTP server",
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nil,
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nil,
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)
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return 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 *Collector) Collect(ch chan<- prometheus.Metric) error {
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errs := make([]error, 0, 2)
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if slices.Contains(c.config.CollectorsEnabled, collectorSystemTime) {
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if err := c.collectTime(ch); err != nil {
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errs = append(errs, fmt.Errorf("failed collecting time metrics: %w", err))
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}
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}
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if slices.Contains(c.config.CollectorsEnabled, collectorNTP) {
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if err := c.collectNTP(ch); err != nil {
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errs = append(errs, fmt.Errorf("failed collecting time ntp metrics: %w", err))
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}
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}
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return errors.Join(errs...)
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}
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func (c *Collector) collectTime(ch chan<- prometheus.Metric) error {
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ch <- prometheus.MustNewConstMetric(
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c.currentTime,
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prometheus.GaugeValue,
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float64(time.Now().Unix()),
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)
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timeZoneInfo, err := kernel32.GetDynamicTimeZoneInformation()
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if err != nil {
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return err
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}
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// timeZoneKeyName contains the english name of the timezone.
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timezoneName := windows.UTF16ToString(timeZoneInfo.TimeZoneKeyName[:])
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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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return nil
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}
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func (c *Collector) collectNTP(ch chan<- prometheus.Metric) error {
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err := c.perfDataCollector.Collect(&c.perfDataObject)
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if err != nil {
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return fmt.Errorf("failed to collect VM Memory metrics: %w", err)
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}
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ch <- prometheus.MustNewConstMetric(
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c.clockFrequencyAdjustmentPPBTotal,
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prometheus.CounterValue,
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c.perfDataObject[0].ClockFrequencyAdjustmentPPBTotal,
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)
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ch <- prometheus.MustNewConstMetric(
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c.computedTimeOffset,
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prometheus.GaugeValue,
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c.perfDataObject[0].ComputedTimeOffset/1000000, // microseconds -> seconds
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)
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ch <- prometheus.MustNewConstMetric(
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c.ntpClientTimeSourceCount,
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prometheus.GaugeValue,
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c.perfDataObject[0].NTPClientTimeSourceCount,
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)
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ch <- prometheus.MustNewConstMetric(
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c.ntpRoundTripDelay,
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prometheus.GaugeValue,
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c.perfDataObject[0].NTPRoundTripDelay/1000000, // microseconds -> seconds
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)
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ch <- prometheus.MustNewConstMetric(
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c.ntpServerIncomingRequestsTotal,
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prometheus.CounterValue,
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c.perfDataObject[0].NTPServerIncomingRequestsTotal,
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)
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ch <- prometheus.MustNewConstMetric(
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c.ntpServerOutgoingResponsesTotal,
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prometheus.CounterValue,
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c.perfDataObject[0].NTPServerOutgoingResponsesTotal,
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)
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return nil
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}
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