mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-28 23:19:46 -08:00
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into package collector * Refactor collector enabling * Update README with new collector enabled flags * Fix out-of-date inline flag reference syntax * Use new flags in end-to-end tests * Add flag to disable all default collectors * Track if a flag has been set explicitly * Add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
103 lines
3.1 KiB
Go
103 lines
3.1 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 !nostat
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package collector
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import (
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"fmt"
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"github.com/prometheus/procfs"
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"github.com/prometheus/client_golang/prometheus"
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)
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type statCollector struct {
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cpu *prometheus.Desc
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intr *prometheus.Desc
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ctxt *prometheus.Desc
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forks *prometheus.Desc
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btime *prometheus.Desc
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procsRunning *prometheus.Desc
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procsBlocked *prometheus.Desc
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}
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func init() {
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registerCollector("stat", defaultEnabled, NewStatCollector)
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}
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// NewStatCollector returns a new Collector exposing kernel/system statistics.
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func NewStatCollector() (Collector, error) {
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return &statCollector{
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cpu: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "cpu"),
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"Seconds the cpus spent in each mode.",
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[]string{"cpu", "mode"}, nil,
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),
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intr: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "intr"),
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"Total number of interrupts serviced.",
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nil, nil,
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),
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ctxt: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "context_switches"),
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"Total number of context switches.",
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nil, nil,
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),
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forks: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "forks"),
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"Total number of forks.",
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nil, nil,
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),
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btime: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "boot_time"),
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"Node boot time, in unixtime.",
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nil, nil,
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),
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procsRunning: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "procs_running"),
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"Number of processes in runnable state.",
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nil, nil,
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),
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procsBlocked: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "", "procs_blocked"),
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"Number of processes blocked waiting for I/O to complete.",
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nil, nil,
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),
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}, nil
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}
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// Update implements Collector and exposes kernel and system statistics.
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func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
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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: %v", err)
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}
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stats, err := fs.NewStat()
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if err != nil {
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return err
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}
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ch <- prometheus.MustNewConstMetric(c.intr, prometheus.CounterValue, float64(stats.IRQTotal))
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ch <- prometheus.MustNewConstMetric(c.ctxt, prometheus.CounterValue, float64(stats.ContextSwitches))
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ch <- prometheus.MustNewConstMetric(c.forks, prometheus.CounterValue, float64(stats.ProcessCreated))
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ch <- prometheus.MustNewConstMetric(c.btime, prometheus.GaugeValue, float64(stats.BootTime))
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ch <- prometheus.MustNewConstMetric(c.procsRunning, prometheus.GaugeValue, float64(stats.ProcessesRunning))
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ch <- prometheus.MustNewConstMetric(c.procsBlocked, prometheus.GaugeValue, float64(stats.ProcessesBlocked))
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return nil
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}
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