mirror of
https://github.com/prometheus/node_exporter.git
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a516d4de4a
* Correctly name collector file. * Fix cgroup summary type as gauge. * Use a boolean metric rather than a label for enabled. Signed-off-by: Ben Kochie <superq@gmail.com>
74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
// Copyright 2022 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 !nostat
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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/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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const cgroupsCollectorSubsystem = "cgroups"
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type cgroupSummaryCollector struct {
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fs procfs.FS
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cgroups *prometheus.Desc
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enabled *prometheus.Desc
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logger log.Logger
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}
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func init() {
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registerCollector(cgroupsCollectorSubsystem, defaultDisabled, NewCgroupSummaryCollector)
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}
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// NewCgroupSummaryCollector returns a new Collector exposing a summary of cgroups.
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func NewCgroupSummaryCollector(logger log.Logger) (Collector, error) {
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fs, err := procfs.NewFS(*procPath)
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if err != nil {
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return nil, fmt.Errorf("failed to open procfs: %w", err)
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}
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return &cgroupSummaryCollector{
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fs: fs,
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cgroups: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, cgroupsCollectorSubsystem, "cgroups"),
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"Current cgroup number of the subsystem.",
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[]string{"subsys_name"}, nil,
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),
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enabled: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, cgroupsCollectorSubsystem, "enabled"),
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"Current cgroup number of the subsystem.",
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[]string{"subsys_name"}, nil,
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),
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logger: logger,
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}, nil
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}
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// Update implements Collector and exposes cgroup statistics.
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func (c *cgroupSummaryCollector) Update(ch chan<- prometheus.Metric) error {
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cgroupSummarys, err := c.fs.CgroupSummarys()
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if err != nil {
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return err
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}
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for _, cs := range cgroupSummarys {
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ch <- prometheus.MustNewConstMetric(c.cgroups, prometheus.GaugeValue, float64(cs.Cgroups), cs.SubsysName)
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ch <- prometheus.MustNewConstMetric(c.enabled, prometheus.GaugeValue, float64(cs.Enabled), cs.SubsysName)
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}
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return nil
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}
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