mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-03 15:31:05 +01:00
104 lines
2.9 KiB
Go
104 lines
2.9 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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// +build !nobonding
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package collector
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"strings"
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"github.com/prometheus/client_golang/prometheus"
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)
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type bondingCollector struct {
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slaves, active *prometheus.GaugeVec
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}
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func init() {
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Factories["bonding"] = NewBondingCollector
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}
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// NewBondingCollector returns a newly allocated bondingCollector.
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// It exposes the number of configured and active slave of linux bonding interfaces.
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func NewBondingCollector() (Collector, error) {
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return &bondingCollector{
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slaves: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Name: "net_bonding_slaves",
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Help: "Number of configured slaves per bonding interface.",
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},
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[]string{"master"},
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),
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active: prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: Namespace,
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Name: "net_bonding_slaves_active",
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Help: "Number of active slaves per bonding interface.",
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},
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[]string{"master"},
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),
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}, nil
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}
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// Update reads and exposes bonding states, implements Collector interface. Caution: This works only on linux.
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func (c *bondingCollector) Update(ch chan<- prometheus.Metric) (err error) {
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bondingStats, err := readBondingStats(sysFilePath("class/net"))
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if err != nil {
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return err
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}
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for master, status := range bondingStats {
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c.slaves.WithLabelValues(master).Set(float64(status[0]))
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c.active.WithLabelValues(master).Set(float64(status[1]))
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}
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c.slaves.Collect(ch)
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c.active.Collect(ch)
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return nil
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}
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func readBondingStats(root string) (status map[string][2]int, err error) {
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status = map[string][2]int{}
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masters, err := ioutil.ReadFile(path.Join(root, "bonding_masters"))
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if err != nil {
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return nil, err
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}
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for _, master := range strings.Fields(string(masters)) {
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slaves, err := ioutil.ReadFile(path.Join(root, master, "bonding", "slaves"))
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if err != nil {
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return nil, err
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}
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sstat := [2]int{0, 0}
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for _, slave := range strings.Fields(string(slaves)) {
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state, err := ioutil.ReadFile(path.Join(root, master, fmt.Sprintf("lower_%s", slave), "operstate"))
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if os.IsNotExist(err) {
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// some older? kernels use slave_ prefix
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state, err = ioutil.ReadFile(path.Join(root, master, fmt.Sprintf("slave_%s", slave), "operstate"))
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}
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if err != nil {
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return nil, err
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}
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sstat[0]++
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if strings.TrimSpace(string(state)) == "up" {
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sstat[1]++
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}
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}
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status[master] = sstat
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}
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return status, err
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}
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