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f5ae31a84c
The new `lnstat` collector produces a high number of metrics, per-cpu, and results in approximately double the number of metrics previously scraped. For example, a typical server with 64 cores produces 3832 lnstat metrics compared to 4147 metrics for the remaining collectors. Therefore disable the `lnstat` collector by default. Signed-off-by: Benjamin Drung <benjamin.drung@ionos.com>
73 lines
1.8 KiB
Go
73 lines
1.8 KiB
Go
// Copyright 2015 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 !nolnstat
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// +build !nolnstat
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package collector
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import (
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"fmt"
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"strconv"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/procfs"
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)
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type lnstatCollector struct {
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logger log.Logger
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}
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func init() {
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registerCollector("lnstat", defaultDisabled, NewLnstatCollector)
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}
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func NewLnstatCollector(logger log.Logger) (Collector, error) {
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return &lnstatCollector{logger}, nil
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}
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func (c *lnstatCollector) Update(ch chan<- prometheus.Metric) error {
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const (
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subsystem = "lnstat"
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)
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fs, err := procfs.NewFS(*procPath)
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if err != nil {
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return fmt.Errorf("failed to open procfs: %w", err)
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}
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netStats, err := fs.NetStat()
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if err != nil {
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return fmt.Errorf("Lnstat error: %s", err)
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}
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for _, netStatFile := range netStats {
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labelNames := []string{"subsystem", "cpu"}
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for header, stats := range netStatFile.Stats {
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for cpu, value := range stats {
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labelValues := []string{netStatFile.Filename, strconv.Itoa(cpu)}
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ch <- prometheus.MustNewConstMetric(
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prometheus.NewDesc(
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prometheus.BuildFQName(namespace, subsystem, header+"_total"),
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"linux network cache stats",
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labelNames, nil,
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),
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prometheus.CounterValue, float64(value), labelValues...,
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)
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}
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}
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}
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return nil
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}
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