mirror of
https://github.com/prometheus/node_exporter.git
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dfa53f835a
* Use `errors.Is()` for unwrapping errors. * Use `%w` error verb in internal error formatting. Signed-off-by: Ben Kochie <superq@gmail.com>
89 lines
2.6 KiB
Go
89 lines
2.6 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 !noudp_queues
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package collector
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import (
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"errors"
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"fmt"
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"os"
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"github.com/go-kit/kit/log"
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"github.com/go-kit/kit/log/level"
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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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type (
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udpQueuesCollector struct {
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fs procfs.FS
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desc *prometheus.Desc
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logger log.Logger
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}
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)
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func init() {
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registerCollector("udp_queues", defaultEnabled, NewUDPqueuesCollector)
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}
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// NewUDPqueuesCollector returns a new Collector exposing network udp queued bytes.
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func NewUDPqueuesCollector(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 &udpQueuesCollector{
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fs: fs,
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desc: prometheus.NewDesc(
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prometheus.BuildFQName(namespace, "udp", "queues"),
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"Number of allocated memory in the kernel for UDP datagrams in bytes.",
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[]string{"queue", "ip"}, nil,
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),
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logger: logger,
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}, nil
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}
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func (c *udpQueuesCollector) Update(ch chan<- prometheus.Metric) error {
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s4, errIPv4 := c.fs.NetUDPSummary()
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if errIPv4 == nil {
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ch <- prometheus.MustNewConstMetric(c.desc, prometheus.GaugeValue, float64(s4.TxQueueLength), "tx", "v4")
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ch <- prometheus.MustNewConstMetric(c.desc, prometheus.GaugeValue, float64(s4.RxQueueLength), "rx", "v4")
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} else {
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if errors.Is(errIPv4, os.ErrNotExist) {
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level.Debug(c.logger).Log("msg", "not collecting ipv4 based metrics")
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} else {
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return fmt.Errorf("couldn't get upd queued bytes: %w", errIPv4)
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}
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}
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s6, errIPv6 := c.fs.NetUDP6Summary()
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if errIPv6 == nil {
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ch <- prometheus.MustNewConstMetric(c.desc, prometheus.GaugeValue, float64(s6.TxQueueLength), "tx", "v6")
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ch <- prometheus.MustNewConstMetric(c.desc, prometheus.GaugeValue, float64(s6.RxQueueLength), "rx", "v6")
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} else {
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if errors.Is(errIPv6, os.ErrNotExist) {
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level.Debug(c.logger).Log("msg", "not collecting ipv6 based metrics")
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} else {
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return fmt.Errorf("couldn't get upd6 queued bytes: %w", errIPv6)
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}
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}
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if errors.Is(errIPv4, os.ErrNotExist) && errors.Is(errIPv6, os.ErrNotExist) {
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return ErrNoData
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}
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return nil
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}
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