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// Copyright 2015 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 !noedac
// +build !noedac
package collector
import (
"fmt"
"log/slog"
"path/filepath"
"regexp"
"github.com/prometheus/client_golang/prometheus"
)
const (
edacSubsystem = "edac"
)
var (
edacMemControllerRE = regexp.MustCompile(`.*devices/system/edac/mc/mc([0-9]*)`)
edacMemCsrowRE = regexp.MustCompile(`.*devices/system/edac/mc/mc[0-9]*/csrow([0-9]*)`)
)
type edacCollector struct {
ceCount *prometheus.Desc
ueCount *prometheus.Desc
csRowCECount *prometheus.Desc
csRowUECount *prometheus.Desc
logger *slog.Logger
}
func init() {
registerCollector("edac", defaultEnabled, NewEdacCollector)
}
// NewEdacCollector returns a new Collector exposing edac stats.
func NewEdacCollector(logger *slog.Logger) (Collector, error) {
return &edacCollector{
ceCount: prometheus.NewDesc(
prometheus.BuildFQName(namespace, edacSubsystem, "correctable_errors_total"),
"Total correctable memory errors.",
[]string{"controller"}, nil,
),
ueCount: prometheus.NewDesc(
prometheus.BuildFQName(namespace, edacSubsystem, "uncorrectable_errors_total"),
"Total uncorrectable memory errors.",
[]string{"controller"}, nil,
),
csRowCECount: prometheus.NewDesc(
prometheus.BuildFQName(namespace, edacSubsystem, "csrow_correctable_errors_total"),
"Total correctable memory errors for this csrow.",
[]string{"controller", "csrow"}, nil,
),
csRowUECount: prometheus.NewDesc(
prometheus.BuildFQName(namespace, edacSubsystem, "csrow_uncorrectable_errors_total"),
"Total uncorrectable memory errors for this csrow.",
[]string{"controller", "csrow"}, nil,
),
logger: logger,
}, nil
}
func (c *edacCollector) Update(ch chan<- prometheus.Metric) error {
memControllers, err := filepath.Glob(sysFilePath("devices/system/edac/mc/mc[0-9]*"))
if err != nil {
return err
}
for _, controller := range memControllers {
controllerMatch := edacMemControllerRE.FindStringSubmatch(controller)
if controllerMatch == nil {
return fmt.Errorf("controller string didn't match regexp: %s", controller)
}
controllerNumber := controllerMatch[1]
value, err := readUintFromFile(filepath.Join(controller, "ce_count"))
if err != nil {
return fmt.Errorf("couldn't get ce_count for controller %s: %w", controllerNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.ceCount, prometheus.CounterValue, float64(value), controllerNumber)
value, err = readUintFromFile(filepath.Join(controller, "ce_noinfo_count"))
if err != nil {
return fmt.Errorf("couldn't get ce_noinfo_count for controller %s: %w", controllerNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.csRowCECount, prometheus.CounterValue, float64(value), controllerNumber, "unknown")
value, err = readUintFromFile(filepath.Join(controller, "ue_count"))
if err != nil {
return fmt.Errorf("couldn't get ue_count for controller %s: %w", controllerNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.ueCount, prometheus.CounterValue, float64(value), controllerNumber)
value, err = readUintFromFile(filepath.Join(controller, "ue_noinfo_count"))
if err != nil {
return fmt.Errorf("couldn't get ue_noinfo_count for controller %s: %w", controllerNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.csRowUECount, prometheus.CounterValue, float64(value), controllerNumber, "unknown")
// For each controller, walk the csrow directories.
csrows, err := filepath.Glob(controller + "/csrow[0-9]*")
if err != nil {
return err
}
for _, csrow := range csrows {
csrowMatch := edacMemCsrowRE.FindStringSubmatch(csrow)
if csrowMatch == nil {
return fmt.Errorf("csrow string didn't match regexp: %s", csrow)
}
csrowNumber := csrowMatch[1]
value, err = readUintFromFile(filepath.Join(csrow, "ce_count"))
if err != nil {
return fmt.Errorf("couldn't get ce_count for controller/csrow %s/%s: %w", controllerNumber, csrowNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.csRowCECount, prometheus.CounterValue, float64(value), controllerNumber, csrowNumber)
value, err = readUintFromFile(filepath.Join(csrow, "ue_count"))
if err != nil {
return fmt.Errorf("couldn't get ue_count for controller/csrow %s/%s: %w", controllerNumber, csrowNumber, err)
}
ch <- prometheus.MustNewConstMetric(
c.csRowUECount, prometheus.CounterValue, float64(value), controllerNumber, csrowNumber)
}
}
return err
}
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