mirror of
https://github.com/prometheus-community/windows_exporter
synced 2025-01-25 00:33:49 +00:00
143 lines
3.5 KiB
Go
143 lines
3.5 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 pagefile
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import (
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"fmt"
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"log/slog"
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"os"
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"strings"
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"github.com/alecthomas/kingpin/v2"
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"github.com/prometheus-community/windows_exporter/internal/headers/psapi"
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"github.com/prometheus-community/windows_exporter/internal/mi"
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"github.com/prometheus-community/windows_exporter/internal/perfdata"
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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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)
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const Name = "pagefile"
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type Config struct{}
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//nolint:gochecknoglobals
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var ConfigDefaults = Config{}
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// A Collector is a Prometheus Collector for WMI metrics.
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type Collector struct {
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config Config
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perfDataCollector *perfdata.Collector
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pagingFreeBytes *prometheus.Desc
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pagingLimitBytes *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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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(_ *kingpin.Application) *Collector {
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return &Collector{}
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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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c.perfDataCollector.Close()
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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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var err error
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c.perfDataCollector, err = perfdata.NewCollector("Paging File", perfdata.InstancesAll, []string{
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usage,
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})
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if err != nil {
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return fmt.Errorf("failed to create Paging File collector: %w", err)
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}
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c.pagingLimitBytes = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "limit_bytes"),
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"Number of bytes that can be stored in the operating system paging files. 0 (zero) indicates that there are no paging files",
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[]string{"file"},
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nil,
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)
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c.pagingFreeBytes = prometheus.NewDesc(
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prometheus.BuildFQName(types.Namespace, Name, "free_bytes"),
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"Number of bytes that can be mapped into the operating system paging files without causing any other pages to be swapped out",
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[]string{"file"},
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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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data, err := c.perfDataCollector.Collect()
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if err != nil {
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return fmt.Errorf("failed to collect Paging File metrics: %w", err)
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}
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gpi, err := psapi.GetPerformanceInfo()
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if err != nil {
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return err
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}
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for fileName, pageFile := range data {
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fileString := strings.ReplaceAll(fileName, `\??\`, "")
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file, err := os.Stat(fileString)
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var fileSize float64
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// For unknown reasons, Windows doesn't always create a page file. Continue collection rather than aborting.
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if err == nil {
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fileSize = float64(file.Size())
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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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fileSize-(pageFile[usage].FirstValue*float64(gpi.PageSize)),
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fileString,
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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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fileSize,
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fileString,
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)
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}
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return nil
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}
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