mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-10 07:34:09 -08:00
75 lines
2 KiB
Go
75 lines
2 KiB
Go
// 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.
|
|
|
|
// +build !nobuddyinfo
|
|
// +build !netbsd
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/common/log"
|
|
"github.com/prometheus/procfs"
|
|
)
|
|
|
|
const (
|
|
buddyInfoSubsystem = "buddyinfo"
|
|
)
|
|
|
|
type buddyinfoCollector struct {
|
|
desc *prometheus.Desc
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("buddyinfo", defaultDisabled, NewBuddyinfoCollector)
|
|
}
|
|
|
|
// NewBuddyinfoCollector returns a new Collector exposing buddyinfo stats.
|
|
func NewBuddyinfoCollector() (Collector, error) {
|
|
desc := prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, buddyInfoSubsystem, "blocks"),
|
|
"Count of free blocks according to size.",
|
|
[]string{"node", "zone", "size"}, nil,
|
|
)
|
|
return &buddyinfoCollector{desc}, nil
|
|
}
|
|
|
|
// Update calls (*buddyinfoCollector).getBuddyInfo to get the platform specific
|
|
// buddyinfo metrics.
|
|
func (c *buddyinfoCollector) Update(ch chan<- prometheus.Metric) error {
|
|
fs, err := procfs.NewFS(*procPath)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to open procfs: %v", err)
|
|
}
|
|
|
|
buddyInfo, err := fs.NewBuddyInfo()
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't get buddyinfo: %s", err)
|
|
}
|
|
|
|
log.Debugf("Set node_buddy: %#v", buddyInfo)
|
|
for _, entry := range buddyInfo {
|
|
for size, value := range entry.Sizes {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
c.desc,
|
|
prometheus.GaugeValue, value,
|
|
entry.Node, entry.Zone, strconv.Itoa(size),
|
|
)
|
|
}
|
|
}
|
|
return nil
|
|
}
|