mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-26 22:19:44 -08:00
76 lines
1.8 KiB
Go
76 lines
1.8 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.
|
|
|
|
//go:build !nomeminfo
|
|
// +build !nomeminfo
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"io"
|
|
"os"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
var (
|
|
reParens = regexp.MustCompile(`\((.*)\)`)
|
|
)
|
|
|
|
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
|
|
file, err := os.Open(procFilePath("meminfo"))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer file.Close()
|
|
|
|
return parseMemInfo(file)
|
|
}
|
|
|
|
func parseMemInfo(r io.Reader) (map[string]float64, error) {
|
|
var (
|
|
memInfo = map[string]float64{}
|
|
scanner = bufio.NewScanner(r)
|
|
)
|
|
|
|
for scanner.Scan() {
|
|
line := scanner.Text()
|
|
parts := strings.Fields(line)
|
|
// Workaround for empty lines occasionally occur in CentOS 6.2 kernel 3.10.90.
|
|
if len(parts) == 0 {
|
|
continue
|
|
}
|
|
fv, err := strconv.ParseFloat(parts[1], 64)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid value in meminfo: %w", err)
|
|
}
|
|
key := parts[0][:len(parts[0])-1] // remove trailing : from key
|
|
// Active(anon) -> Active_anon
|
|
key = reParens.ReplaceAllString(key, "_${1}")
|
|
switch len(parts) {
|
|
case 2: // no unit
|
|
case 3: // has unit, we presume kB
|
|
fv *= 1024
|
|
key = key + "_bytes"
|
|
default:
|
|
return nil, fmt.Errorf("invalid line in meminfo: %s", line)
|
|
}
|
|
memInfo[key] = fv
|
|
}
|
|
|
|
return memInfo, scanner.Err()
|
|
}
|