mirror of
https://github.com/prometheus/node_exporter.git
synced 2025-08-20 18:33:52 -07:00
047003b6bb
* Add qdisc collector for Linux This collector gathers basic queueing discipline metrics via netlink, similarly to what `tc -s qdisc show` does. * qdisc collector: nl-specific code moved, names fixed - netlink-specific parts moved to github.com/ema/qdisc - avoid using shortened names - counters renamed into XXX_total * Get rid of parseMessage error checking leftover * Add github.com/ema/qdisc to vendored packages * Update help texts and comments * Add qdisc collector to README file * qdisc collector end-to-end testing * Update qdisc dependency to latest version Update github.com/ema/qdisc dependency to revision 2c7e72d, which includes unit testing. * qdisc collector: rename "iface" label into "device"
117 lines
3.2 KiB
Go
117 lines
3.2 KiB
Go
// Copyright 2017 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 !noqdisc
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package collector
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import (
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"encoding/json"
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"flag"
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"io/ioutil"
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"path/filepath"
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"github.com/ema/qdisc"
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"github.com/prometheus/client_golang/prometheus"
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)
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type qdiscStatCollector struct {
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bytes typedDesc
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packets typedDesc
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drops typedDesc
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requeues typedDesc
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overlimits typedDesc
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}
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var (
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collectorQdisc = flag.String("collector.qdisc", "", "test fixtures to use for qdisc collector end-to-end testing")
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)
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func init() {
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Factories["qdisc"] = NewQdiscStatCollector
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}
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func NewQdiscStatCollector() (Collector, error) {
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return &qdiscStatCollector{
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bytes: typedDesc{prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "qdisc", "bytes_total"),
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"Number of bytes sent.",
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[]string{"device", "kind"}, nil,
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), prometheus.CounterValue},
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packets: typedDesc{prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "qdisc", "packets_total"),
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"Number of packets sent.",
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[]string{"device", "kind"}, nil,
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), prometheus.CounterValue},
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drops: typedDesc{prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "qdisc", "drops_total"),
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"Number of packets dropped.",
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[]string{"device", "kind"}, nil,
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), prometheus.CounterValue},
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requeues: typedDesc{prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "qdisc", "requeues_total"),
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"Number of packets dequeued, not transmitted, and requeued.",
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[]string{"device", "kind"}, nil,
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), prometheus.CounterValue},
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overlimits: typedDesc{prometheus.NewDesc(
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prometheus.BuildFQName(Namespace, "qdisc", "overlimits_total"),
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"Number of overlimit packets.",
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[]string{"device", "kind"}, nil,
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), prometheus.CounterValue},
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}, nil
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}
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func testQdiscGet(fixtures string) ([]qdisc.QdiscInfo, error) {
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var res []qdisc.QdiscInfo
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b, err := ioutil.ReadFile(filepath.Join(fixtures, "results.json"))
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if err != nil {
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return res, err
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}
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err = json.Unmarshal(b, &res)
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return res, err
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}
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func (c *qdiscStatCollector) Update(ch chan<- prometheus.Metric) error {
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var msgs []qdisc.QdiscInfo
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var err error
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fixtures := *collectorQdisc
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if fixtures == "" {
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msgs, err = qdisc.Get()
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} else {
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msgs, err = testQdiscGet(fixtures)
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}
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if err != nil {
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return err
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}
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for _, msg := range msgs {
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// Only report root qdisc information.
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if msg.Parent != 0 {
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continue
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}
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ch <- c.bytes.mustNewConstMetric(float64(msg.Bytes), msg.IfaceName, msg.Kind)
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ch <- c.packets.mustNewConstMetric(float64(msg.Packets), msg.IfaceName, msg.Kind)
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ch <- c.drops.mustNewConstMetric(float64(msg.Drops), msg.IfaceName, msg.Kind)
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ch <- c.requeues.mustNewConstMetric(float64(msg.Requeues), msg.IfaceName, msg.Kind)
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ch <- c.overlimits.mustNewConstMetric(float64(msg.Overlimits), msg.IfaceName, msg.Kind)
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}
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return nil
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}
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