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Add IO stats and ext4 FS stats through new ext4 collector #3295
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // Copyright 2017 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. | ||
|
|
||
| //go:build !noext4 | ||
| // +build !noext4 | ||
|
|
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| package collector | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "log/slog" | ||
|
|
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| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/prometheus/procfs/ext4" | ||
| ) | ||
|
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||
| // An ext4Collector is a Collector which gathers metrics from ext4 filesystems. | ||
| type ext4Collector struct { | ||
| fs ext4.FS | ||
| logger *slog.Logger | ||
| } | ||
|
|
||
| func init() { | ||
| registerCollector("ext4", defaultEnabled, NewExt4Collector) | ||
| } | ||
|
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| // NewExt4Collector returns a new Collector exposing ext4 statistics. | ||
| func NewExt4Collector(logger *slog.Logger) (Collector, error) { | ||
| fs, err := ext4.NewFS(*procPath, *sysPath) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to open sysfs: %w", err) | ||
| } | ||
|
|
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| return &ext4Collector{ | ||
| fs: fs, | ||
| logger: logger, | ||
| }, nil | ||
| } | ||
|
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| // Update implements Collector. | ||
| func (c *ext4Collector) Update(ch chan<- prometheus.Metric) error { | ||
| stats, err := c.fs.ProcStat() | ||
| if err != nil { | ||
| return fmt.Errorf("failed to retrieve ext4 stats: %w", err) | ||
| } | ||
|
|
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| for _, s := range stats { | ||
| c.updateExt4Stats(ch, s) | ||
| } | ||
|
|
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| return nil | ||
| } | ||
|
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| // updateExt4Stats collects statistics for a single ext4 filesystem. | ||
| func (c *ext4Collector) updateExt4Stats(ch chan<- prometheus.Metric, s *ext4.Stats) { | ||
| const ( | ||
| subsystem = "ext4" | ||
| ) | ||
| var ( | ||
| labels = []string{"device"} | ||
| ) | ||
|
|
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| metrics := []struct { | ||
| name string | ||
| desc string | ||
| value float64 | ||
| }{ | ||
| { | ||
| name: "errors", | ||
| desc: "Number of ext4 filesystem errors.", | ||
| value: float64(s.Errors), | ||
| }, | ||
| { | ||
| name: "warnings", | ||
| desc: "Number of ext4 filesystem warnings.", | ||
| value: float64(s.Warnings), | ||
| }, | ||
| { | ||
| name: "messages", | ||
| desc: "Number of ext4 filesystem log messages.", | ||
| value: float64(s.Messages), | ||
| }, | ||
| } | ||
|
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| for _, m := range metrics { | ||
| desc := prometheus.NewDesc( | ||
| prometheus.BuildFQName(namespace, subsystem, m.name), | ||
| m.desc, | ||
| labels, | ||
| nil, | ||
| ) | ||
|
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| ch <- prometheus.MustNewConstMetric( | ||
| desc, | ||
| prometheus.CounterValue, | ||
| m.value, | ||
| s.Name, | ||
| ) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
|
|
@@ -50,6 +50,7 @@ enabled_collectors=$(cat << COLLECTORS | |
| drbd | ||
| edac | ||
| entropy | ||
| ext4 | ||
| fibrechannel | ||
| filefd | ||
| hwmon | ||
|
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||
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This needs to be implemented in the procfs library first.
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Naively it looks like prometheus/procfs#651 merged, is this PR in need of a new owner? Found this PR via the associated issue 😅