mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-24 03:06:35 +01:00
859a825bb8
* Move NodeCollector into package collector * Refactor collector enabling * Update README with new collector enabled flags * Fix out-of-date inline flag reference syntax * Use new flags in end-to-end tests * Add flag to disable all default collectors * Track if a flag has been set explicitly * Add --collectors.disable-defaults to README * Revert disable-defaults flag * Shorten flags * Fixup timex collector registration * Fix end-to-end tests * Change procfs and sysfs path flags * Fix review comments
78 lines
2.3 KiB
Go
78 lines
2.3 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 !nonetdev
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// +build linux freebsd openbsd dragonfly darwin
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package collector
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import (
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"fmt"
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"regexp"
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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"gopkg.in/alecthomas/kingpin.v2"
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)
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var (
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netdevIgnoredDevices = kingpin.Flag("collector.netdev.ignored-devices", "Regexp of net devices to ignore for netdev collector.").Default("^$").String()
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)
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type netDevCollector struct {
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subsystem string
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ignoredDevicesPattern *regexp.Regexp
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metricDescs map[string]*prometheus.Desc
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}
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func init() {
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registerCollector("netdev", defaultEnabled, NewNetDevCollector)
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}
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// NewNetDevCollector returns a new Collector exposing network device stats.
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func NewNetDevCollector() (Collector, error) {
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pattern := regexp.MustCompile(*netdevIgnoredDevices)
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return &netDevCollector{
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subsystem: "network",
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ignoredDevicesPattern: pattern,
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metricDescs: map[string]*prometheus.Desc{},
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}, nil
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}
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func (c *netDevCollector) Update(ch chan<- prometheus.Metric) error {
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netDev, err := getNetDevStats(c.ignoredDevicesPattern)
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if err != nil {
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return fmt.Errorf("couldn't get netstats: %s", err)
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}
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for dev, devStats := range netDev {
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for key, value := range devStats {
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desc, ok := c.metricDescs[key]
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if !ok {
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desc = prometheus.NewDesc(
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prometheus.BuildFQName(namespace, c.subsystem, key),
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fmt.Sprintf("Network device statistic %s.", key),
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[]string{"device"},
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nil,
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)
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c.metricDescs[key] = desc
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}
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v, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return fmt.Errorf("invalid value %s in netstats: %s", value, err)
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}
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ch <- prometheus.MustNewConstMetric(desc, prometheus.GaugeValue, v, dev)
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}
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}
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return nil
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}
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