mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-02-08 05:56:37 +00:00
142 lines
3.5 KiB
Go
142 lines
3.5 KiB
Go
// Copyright 2024 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
//go:build windows
|
|
|
|
package pagefile
|
|
|
|
import (
|
|
"fmt"
|
|
"log/slog"
|
|
"os"
|
|
"strings"
|
|
|
|
"github.com/alecthomas/kingpin/v2"
|
|
"github.com/prometheus-community/windows_exporter/internal/headers/psapi"
|
|
"github.com/prometheus-community/windows_exporter/internal/mi"
|
|
"github.com/prometheus-community/windows_exporter/internal/pdh"
|
|
"github.com/prometheus-community/windows_exporter/internal/types"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
const Name = "pagefile"
|
|
|
|
type Config struct{}
|
|
|
|
//nolint:gochecknoglobals
|
|
var ConfigDefaults = Config{}
|
|
|
|
// A Collector is a Prometheus Collector for WMI metrics.
|
|
type Collector struct {
|
|
config Config
|
|
|
|
perfDataCollector *pdh.Collector
|
|
perfDataObject []perfDataCounterValues
|
|
|
|
pagingFreeBytes *prometheus.Desc
|
|
pagingLimitBytes *prometheus.Desc
|
|
}
|
|
|
|
func New(config *Config) *Collector {
|
|
if config == nil {
|
|
config = &ConfigDefaults
|
|
}
|
|
|
|
c := &Collector{
|
|
config: *config,
|
|
}
|
|
|
|
return c
|
|
}
|
|
|
|
func NewWithFlags(_ *kingpin.Application) *Collector {
|
|
return &Collector{}
|
|
}
|
|
|
|
func (c *Collector) GetName() string {
|
|
return Name
|
|
}
|
|
|
|
func (c *Collector) Close() error {
|
|
c.perfDataCollector.Close()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Collector) Build(_ *slog.Logger, _ *mi.Session) error {
|
|
var err error
|
|
|
|
c.perfDataCollector, err = pdh.NewCollector[perfDataCounterValues](pdh.CounterTypeRaw, "Paging File", pdh.InstancesAll)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to create Paging File collector: %w", err)
|
|
}
|
|
|
|
c.pagingLimitBytes = prometheus.NewDesc(
|
|
prometheus.BuildFQName(types.Namespace, Name, "limit_bytes"),
|
|
"Number of bytes that can be stored in the operating system paging files. 0 (zero) indicates that there are no paging files",
|
|
[]string{"file"},
|
|
nil,
|
|
)
|
|
|
|
c.pagingFreeBytes = prometheus.NewDesc(
|
|
prometheus.BuildFQName(types.Namespace, Name, "free_bytes"),
|
|
"Number of bytes that can be mapped into the operating system paging files without causing any other pages to be swapped out",
|
|
[]string{"file"},
|
|
nil,
|
|
)
|
|
|
|
return nil
|
|
}
|
|
|
|
// Collect sends the metric values for each metric
|
|
// to the provided prometheus Metric channel.
|
|
func (c *Collector) Collect(ch chan<- prometheus.Metric) error {
|
|
err := c.perfDataCollector.Collect(&c.perfDataObject)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to collect Paging File metrics: %w", err)
|
|
}
|
|
|
|
gpi, err := psapi.GetPerformanceInfo()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, data := range c.perfDataObject {
|
|
fileString := strings.ReplaceAll(data.Name, `\??\`, "")
|
|
file, err := os.Stat(fileString)
|
|
|
|
var fileSize float64
|
|
|
|
// For unknown reasons, Windows doesn't always create a page file. Continue collection rather than aborting.
|
|
if err == nil {
|
|
fileSize = float64(file.Size())
|
|
}
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
c.pagingFreeBytes,
|
|
prometheus.GaugeValue,
|
|
fileSize-(data.Usage*float64(gpi.PageSize)),
|
|
fileString,
|
|
)
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
c.pagingLimitBytes,
|
|
prometheus.GaugeValue,
|
|
fileSize,
|
|
fileString,
|
|
)
|
|
}
|
|
|
|
return nil
|
|
}
|