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// Copyright 2015 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 !nolnstat
// +build !nolnstat
package collector
import (
"fmt"
"log/slog"
"strconv"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs"
)
type lnstatCollector struct {
logger *slog.Logger
}
func init() {
registerCollector("lnstat", defaultDisabled, NewLnstatCollector)
}
func NewLnstatCollector(logger *slog.Logger) (Collector, error) {
return &lnstatCollector{logger}, nil
}
func (c *lnstatCollector) Update(ch chan<- prometheus.Metric) error {
const (
subsystem = "lnstat"
)
fs, err := procfs.NewFS(*procPath)
if err != nil {
return fmt.Errorf("failed to open procfs: %w", err)
}
netStats, err := fs.NetStat()
if err != nil {
return fmt.Errorf("lnstat error: %s", err)
}
for _, netStatFile := range netStats {
labelNames := []string{"subsystem", "cpu"}
for header, stats := range netStatFile.Stats {
for cpu, value := range stats {
labelValues := []string{netStatFile.Filename, strconv.Itoa(cpu)}
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, header+"_total"),
"linux network cache stats",
labelNames, nil,
),
prometheus.CounterValue, float64(value), labelValues...,
)
}
}
}
return nil
}
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