Johannes 'fish' Ziemke
7 years ago
parent
7b720df1c5
commit
fd66a86a30
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// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package ganglia provides types for unmarshalling gmond's XML output.
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//
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// Not used elements in gmond's XML output are commented.
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// In case you want to use them, please change the names so that one
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// can understand without needing to know what the acronym stands for.
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package ganglia
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import "encoding/xml"
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// ExtraElement describes EXTRA_ELEMENT elements.
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type ExtraElement struct {
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Name string `xml:"NAME,attr"`
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Val string `xml:"VAL,attr"`
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}
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// ExtraData describes EXTRA_DATA elements.
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type ExtraData struct {
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ExtraElements []ExtraElement `xml:"EXTRA_ELEMENT"`
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}
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// Metric describes METRIC elements.
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type Metric struct {
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Name string `xml:"NAME,attr"`
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Value float64 `xml:"VAL,attr"`
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/*
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Unit string `xml:"UNITS,attr"`
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Slope string `xml:"SLOPE,attr"`
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Tn int `xml:"TN,attr"`
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Tmax int `xml:"TMAX,attr"`
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Dmax int `xml:"DMAX,attr"`
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*/
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ExtraData ExtraData `xml:"EXTRA_DATA"`
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}
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// Host describes HOST elements.
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type Host struct {
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Name string `xml:"NAME,attr"`
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/*
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Ip string `xml:"IP,attr"`
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Tags string `xml:"TAGS,attr"`
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Reported int `xml:"REPORTED,attr"`
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Tn int `xml:"TN,attr"`
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Tmax int `xml:"TMAX,attr"`
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Dmax int `xml:"DMAX,attr"`
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Location string `xml:"LOCATION,attr"`
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GmondStarted int `xml:"GMOND_STARTED",attr"`
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*/
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Metrics []Metric `xml:"METRIC"`
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}
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// Cluster describes CLUSTER elements.
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type Cluster struct {
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Name string `xml:"NAME,attr"`
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/*
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Owner string `xml:"OWNER,attr"`
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LatLong string `xml:"LATLONG,attr"`
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Url string `xml:"URL,attr"`
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Localtime int `xml:"LOCALTIME,attr"`
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*/
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Hosts []Host `xml:"HOST"`
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}
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// Ganglia describes the top-level XML structure.
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type Ganglia struct {
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XMLNAME xml.Name `xml:"GANGLIA_XML"`
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Clusters []Cluster `xml:"CLUSTER"`
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}
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@ -1,123 +0,0 @@
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// Copyright 2015 The Prometheus Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build !nogmond
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package collector
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import (
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"bufio"
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"encoding/xml"
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"fmt"
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"io"
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"net"
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"regexp"
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"time"
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"github.com/prometheus/client_golang/prometheus"
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"github.com/prometheus/common/log"
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"github.com/prometheus/node_exporter/collector/ganglia"
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)
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const (
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gangliaAddress = "127.0.0.1:8649"
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gangliaProto = "tcp"
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gangliaTimeout = 30 * time.Second
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gangliaNamespace = "ganglia"
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)
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type gmondCollector struct {
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metrics map[string]*prometheus.GaugeVec
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}
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func init() {
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registerCollector("gmond", defaultDisabled, NewGmondCollector)
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}
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var illegalCharsRE = regexp.MustCompile(`[^a-zA-Z0-9_]`)
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// NewGmondCollector returns a new Collector scraping ganglia.
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func NewGmondCollector() (Collector, error) {
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warnDeprecated("gmond")
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c := gmondCollector{
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metrics: map[string]*prometheus.GaugeVec{},
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}
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return &c, nil
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}
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func (c *gmondCollector) Update(ch chan<- prometheus.Metric) error {
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conn, err := net.Dial(gangliaProto, gangliaAddress)
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log.Debugf("gmondCollector Update")
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if err != nil {
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return fmt.Errorf("can't connect to gmond: %s", err)
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}
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conn.SetDeadline(time.Now().Add(gangliaTimeout))
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ganglia := ganglia.Ganglia{}
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decoder := xml.NewDecoder(bufio.NewReader(conn))
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decoder.CharsetReader = toUtf8
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err = decoder.Decode(&ganglia)
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if err != nil {
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return fmt.Errorf("couldn't parse xml: %s", err)
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}
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for _, cluster := range ganglia.Clusters {
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for _, host := range cluster.Hosts {
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for _, metric := range host.Metrics {
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name := illegalCharsRE.ReplaceAllString(metric.Name, "_")
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c.setMetric(name, cluster.Name, metric)
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}
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}
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}
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for _, m := range c.metrics {
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m.Collect(ch)
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}
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return err
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}
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func (c *gmondCollector) setMetric(name, cluster string, metric ganglia.Metric) {
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if _, ok := c.metrics[name]; !ok {
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var desc string
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var title string
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for _, element := range metric.ExtraData.ExtraElements {
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switch element.Name {
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case "DESC":
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desc = element.Val
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case "TITLE":
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title = element.Val
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}
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if title != "" && desc != "" {
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break
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}
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}
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log.Debugf("Register %s: %s", name, desc)
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c.metrics[name] = prometheus.NewGaugeVec(
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prometheus.GaugeOpts{
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Namespace: gangliaNamespace,
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Name: name,
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Help: desc,
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},
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[]string{"cluster"},
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)
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}
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log.Debugf("Set %s{cluster=%q}: %f", name, cluster, metric.Value)
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c.metrics[name].WithLabelValues(cluster).Set(metric.Value)
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}
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func toUtf8(charset string, input io.Reader) (io.Reader, error) {
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return input, nil //FIXME
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}
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