mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-12 16:44:18 -08:00
83 lines
2.2 KiB
Go
83 lines
2.2 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 !nodiskstats
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// +build !nodiskstats
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package collector
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import (
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"fmt"
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"log/slog"
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"github.com/power-devops/perfstat"
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"github.com/prometheus/client_golang/prometheus"
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)
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const diskstatsDefaultIgnoredDevices = ""
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type diskstatsCollector struct {
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rbytes typedDesc
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wbytes typedDesc
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time typedDesc
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deviceFilter deviceFilter
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logger *slog.Logger
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tickPerSecond int64
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}
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func init() {
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registerCollector("diskstats", defaultEnabled, NewDiskstatsCollector)
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}
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// NewDiskstatsCollector returns a new Collector exposing disk device stats.
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func NewDiskstatsCollector(logger *slog.Logger) (Collector, error) {
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ticks, err := tickPerSecond()
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if err != nil {
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return nil, err
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}
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deviceFilter, err := newDiskstatsDeviceFilter(logger)
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if err != nil {
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return nil, fmt.Errorf("failed to parse device filter flags: %w", err)
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}
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return &diskstatsCollector{
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rbytes: typedDesc{readBytesDesc, prometheus.CounterValue},
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wbytes: typedDesc{writtenBytesDesc, prometheus.CounterValue},
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time: typedDesc{ioTimeSecondsDesc, prometheus.CounterValue},
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deviceFilter: deviceFilter,
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logger: logger,
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tickPerSecond: ticks,
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}, nil
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}
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func (c *diskstatsCollector) Update(ch chan<- prometheus.Metric) error {
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stats, err := perfstat.DiskStat()
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if err != nil {
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return err
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}
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for _, stat := range stats {
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if c.deviceFilter.ignored(stat.Name) {
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continue
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}
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ch <- c.rbytes.mustNewConstMetric(float64(stat.Rblks*512), stat.Name)
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ch <- c.wbytes.mustNewConstMetric(float64(stat.Wblks*512), stat.Name)
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ch <- c.time.mustNewConstMetric(float64(stat.Time/c.tickPerSecond), stat.Name)
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}
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return nil
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}
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