mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-04 16:01:04 +01:00
85 lines
2.2 KiB
Go
85 lines
2.2 KiB
Go
// 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.
|
|
|
|
// +build !noksmd
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"path/filepath"
|
|
|
|
"github.com/go-kit/kit/log"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
var (
|
|
ksmdFiles = []string{"full_scans", "merge_across_nodes", "pages_shared", "pages_sharing",
|
|
"pages_to_scan", "pages_unshared", "pages_volatile", "run", "sleep_millisecs"}
|
|
)
|
|
|
|
type ksmdCollector struct {
|
|
metricDescs map[string]*prometheus.Desc
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("ksmd", defaultDisabled, NewKsmdCollector)
|
|
}
|
|
|
|
func getCanonicalMetricName(filename string) string {
|
|
switch filename {
|
|
case "full_scans":
|
|
return filename + "_total"
|
|
case "sleep_millisecs":
|
|
return "sleep_seconds"
|
|
default:
|
|
return filename
|
|
}
|
|
}
|
|
|
|
// NewKsmdCollector returns a new Collector exposing kernel/system statistics.
|
|
func NewKsmdCollector(logger log.Logger) (Collector, error) {
|
|
subsystem := "ksmd"
|
|
descs := make(map[string]*prometheus.Desc)
|
|
|
|
for _, n := range ksmdFiles {
|
|
descs[n] = prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, subsystem, getCanonicalMetricName(n)),
|
|
fmt.Sprintf("ksmd '%s' file.", n), nil, nil)
|
|
}
|
|
return &ksmdCollector{descs, logger}, nil
|
|
}
|
|
|
|
// Update implements Collector and exposes kernel and system statistics.
|
|
func (c *ksmdCollector) Update(ch chan<- prometheus.Metric) error {
|
|
for _, n := range ksmdFiles {
|
|
val, err := readUintFromFile(sysFilePath(filepath.Join("kernel/mm/ksm", n)))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
t := prometheus.GaugeValue
|
|
v := float64(val)
|
|
switch n {
|
|
case "full_scans":
|
|
t = prometheus.CounterValue
|
|
case "sleep_millisecs":
|
|
v /= 1000
|
|
}
|
|
ch <- prometheus.MustNewConstMetric(c.metricDescs[n], t, v)
|
|
}
|
|
|
|
return nil
|
|
}
|