mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-17 22:20:13 +01:00
123 lines
3.0 KiB
Go
123 lines
3.0 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 !nogmond
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bufio"
|
|
"encoding/xml"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"regexp"
|
|
"time"
|
|
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/common/log"
|
|
"github.com/prometheus/node_exporter/collector/ganglia"
|
|
)
|
|
|
|
const (
|
|
gangliaAddress = "127.0.0.1:8649"
|
|
gangliaProto = "tcp"
|
|
gangliaTimeout = 30 * time.Second
|
|
gangliaNamespace = "ganglia"
|
|
)
|
|
|
|
type gmondCollector struct {
|
|
metrics map[string]*prometheus.GaugeVec
|
|
}
|
|
|
|
func init() {
|
|
Factories["gmond"] = NewGmondCollector
|
|
}
|
|
|
|
var illegalCharsRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
|
|
|
|
// Takes a prometheus registry and returns a new Collector scraping ganglia.
|
|
func NewGmondCollector() (Collector, error) {
|
|
c := gmondCollector{
|
|
metrics: map[string]*prometheus.GaugeVec{},
|
|
}
|
|
|
|
return &c, nil
|
|
}
|
|
|
|
func (c *gmondCollector) Update(ch chan<- prometheus.Metric) (err error) {
|
|
conn, err := net.Dial(gangliaProto, gangliaAddress)
|
|
log.Debugf("gmondCollector Update")
|
|
if err != nil {
|
|
return fmt.Errorf("can't connect to gmond: %s", err)
|
|
}
|
|
conn.SetDeadline(time.Now().Add(gangliaTimeout))
|
|
|
|
ganglia := ganglia.Ganglia{}
|
|
decoder := xml.NewDecoder(bufio.NewReader(conn))
|
|
decoder.CharsetReader = toUtf8
|
|
|
|
err = decoder.Decode(&ganglia)
|
|
if err != nil {
|
|
return fmt.Errorf("couldn't parse xml: %s", err)
|
|
}
|
|
|
|
for _, cluster := range ganglia.Clusters {
|
|
for _, host := range cluster.Hosts {
|
|
|
|
for _, metric := range host.Metrics {
|
|
name := illegalCharsRE.ReplaceAllString(metric.Name, "_")
|
|
|
|
c.setMetric(name, cluster.Name, metric)
|
|
}
|
|
}
|
|
}
|
|
for _, m := range c.metrics {
|
|
m.Collect(ch)
|
|
}
|
|
return err
|
|
}
|
|
|
|
func (c *gmondCollector) setMetric(name, cluster string, metric ganglia.Metric) {
|
|
if _, ok := c.metrics[name]; !ok {
|
|
var desc string
|
|
var title string
|
|
for _, element := range metric.ExtraData.ExtraElements {
|
|
switch element.Name {
|
|
case "DESC":
|
|
desc = element.Val
|
|
case "TITLE":
|
|
title = element.Val
|
|
}
|
|
if title != "" && desc != "" {
|
|
break
|
|
}
|
|
}
|
|
log.Debugf("Register %s: %s", name, desc)
|
|
c.metrics[name] = prometheus.NewGaugeVec(
|
|
prometheus.GaugeOpts{
|
|
Namespace: gangliaNamespace,
|
|
Name: name,
|
|
Help: desc,
|
|
},
|
|
[]string{"cluster"},
|
|
)
|
|
}
|
|
log.Debugf("Set %s{cluster=%q}: %f", name, cluster, metric.Value)
|
|
c.metrics[name].WithLabelValues(cluster).Set(metric.Value)
|
|
}
|
|
|
|
func toUtf8(charset string, input io.Reader) (io.Reader, error) {
|
|
return input, nil //FIXME
|
|
}
|