mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-09 23:24:09 -08:00
82 lines
2.2 KiB
Go
82 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 !noconntrack
|
|
|
|
package collector
|
|
|
|
import (
|
|
"io/ioutil"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
type conntrackCollector struct {
|
|
current *prometheus.Desc
|
|
limit *prometheus.Desc
|
|
}
|
|
|
|
func init() {
|
|
Factories["conntrack"] = NewConntrackCollector
|
|
}
|
|
|
|
// Takes a prometheus registry and returns a new Collector exposing
|
|
// conntrack stats
|
|
func NewConntrackCollector() (Collector, error) {
|
|
return &conntrackCollector{
|
|
current: prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, "", "nf_conntrack_entries"),
|
|
"Number of currently allocated flow entries for connection tracking.",
|
|
nil, nil,
|
|
),
|
|
limit: prometheus.NewDesc(
|
|
prometheus.BuildFQName(Namespace, "", "nf_conntrack_entries_limit"),
|
|
"Maximum size of connection tracking table.",
|
|
nil, nil,
|
|
),
|
|
}, nil
|
|
}
|
|
|
|
func (c *conntrackCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
value, err := readUintFromFile(procFilePath("sys/net/netfilter/nf_conntrack_count"))
|
|
if err != nil {
|
|
// Conntrack probably not loaded into the kernel.
|
|
return nil
|
|
}
|
|
ch <- prometheus.MustNewConstMetric(
|
|
c.current, prometheus.GaugeValue, float64(value))
|
|
|
|
value, err = readUintFromFile(procFilePath("sys/net/netfilter/nf_conntrack_max"))
|
|
if err != nil {
|
|
return nil
|
|
}
|
|
ch <- prometheus.MustNewConstMetric(
|
|
c.limit, prometheus.GaugeValue, float64(value))
|
|
|
|
return nil
|
|
}
|
|
|
|
func readUintFromFile(path string) (uint64, error) {
|
|
data, err := ioutil.ReadFile(path)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
value, err := strconv.ParseUint(strings.TrimSpace(string(data)), 10, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return value, nil
|
|
}
|