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| // Copyright 2019 The Prometheus Authors | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| // +build !nosoftnet | ||
|
|
||
| package collector | ||
|
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||
| import ( | ||
| "fmt" | ||
| "strconv" | ||
|
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| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/procfs" | ||
| ) | ||
|
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| type softnetCollector struct { | ||
| fs procfs.FS | ||
| processed *prometheus.Desc | ||
| dropped *prometheus.Desc | ||
| timeSqueezed *prometheus.Desc | ||
| } | ||
|
|
||
| const ( | ||
| softnetSubsystem = "softnet" | ||
| ) | ||
|
|
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| func init() { | ||
| registerCollector("softnet", defaultEnabled, NewSoftnetCollector) | ||
| } | ||
|
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| // NewSoftnetCollector returns a new Collector exposing softnet metrics. | ||
| func NewSoftnetCollector() (Collector, error) { | ||
| fs, err := procfs.NewFS(*procPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to open procfs: %w", err) | ||
| } | ||
|
|
||
| return &softnetCollector{ | ||
| fs: fs, | ||
| processed: prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, softnetSubsystem, "processed_total"), | ||
| "Number of processed packets", | ||
| []string{"cpu"}, nil, | ||
| ), | ||
| dropped: prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, softnetSubsystem, "dropped_total"), | ||
| "Number of dropped packets", | ||
| []string{"cpu"}, nil, | ||
| ), | ||
| timeSqueezed: prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, softnetSubsystem, "times_squeezed_total"), | ||
| "Number of times processing packets ran out of quota", | ||
| []string{"cpu"}, nil, | ||
| ), | ||
| }, nil | ||
| } | ||
|
|
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| // Update gets parsed softnet statistics using procfs. | ||
| func (c *softnetCollector) Update(ch chan<- prometheus.Metric) error { | ||
| stats, err := c.fs.GatherSoftnetStats() | ||
| if err != nil { | ||
| return fmt.Errorf("could not get softnet statistics: %s", err) | ||
| } | ||
|
|
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| for cpuNumber, cpuStats := range stats { | ||
| cpu := strconv.Itoa(cpuNumber) | ||
|
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| ch <- prometheus.MustNewConstMetric( | ||
| c.processed, | ||
| prometheus.CounterValue, | ||
| float64(cpuStats.Processed), | ||
| cpu, | ||
| ) | ||
| ch <- prometheus.MustNewConstMetric( | ||
| c.dropped, | ||
| prometheus.CounterValue, | ||
| float64(cpuStats.Dropped), | ||
| cpu, | ||
| ) | ||
| ch <- prometheus.MustNewConstMetric( | ||
| c.timeSqueezed, | ||
| prometheus.CounterValue, | ||
| float64(cpuStats.TimeSqueezed), | ||
| cpu, | ||
| ) | ||
| } | ||
|
|
||
| return nil | ||
| } |