mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-27 02:53:02 +01:00
922e74d58f
Named return variables should only be used to describe the returned type further, e.g. `err error` doesn't add any new information and is just stutter.
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
// Copyright 2016 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 !novmstat
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"fmt"
|
|
"os"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
const (
|
|
vmStatSubsystem = "vmstat"
|
|
)
|
|
|
|
type vmStatCollector struct{}
|
|
|
|
func init() {
|
|
Factories["vmstat"] = NewvmStatCollector
|
|
}
|
|
|
|
// NewvmStatCollector returns a new Collector exposing vmstat stats.
|
|
func NewvmStatCollector() (Collector, error) {
|
|
return &vmStatCollector{}, nil
|
|
}
|
|
|
|
func (c *vmStatCollector) Update(ch chan<- prometheus.Metric) error {
|
|
file, err := os.Open(procFilePath("vmstat"))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer file.Close()
|
|
|
|
scanner := bufio.NewScanner(file)
|
|
for scanner.Scan() {
|
|
parts := strings.Fields(scanner.Text())
|
|
value, err := strconv.ParseFloat(parts[1], 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, vmStatSubsystem, parts[0]),
|
|
fmt.Sprintf("/proc/vmstat information field %s.", parts[0]),
|
|
nil, nil),
|
|
prometheus.UntypedValue,
|
|
value,
|
|
)
|
|
}
|
|
return scanner.Err()
|
|
}
|