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initial commit of the bind exporter for prometheus

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Matthew Kanwisher 2015-08-21 05:09:14 +07:00
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.build
bind_exporter
*.tar.gz
*-stamp

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# 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.
VERSION := 0.0.1
TARGET := bind_exporter
include Makefile.COMMON

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# 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.
# THE AUTHORITATIVE VERSION OF THIS MAKEFILE LIVES IN:
#
# https://github.com/prometheus/utils
#
# PLEASE MAKE ANY CHANGES THERE AND PROPAGATE THEM TO ALL PROMETHEUS
# REPOSITORIES THAT ARE USING THIS MAKEFILE.
#
# This file provides common Makefile infrastructure for several Prometheus
# components. This includes make tasks for downloading Go, setting up a
# self-contained build environment, fetching Go dependencies, building
# binaries, running tests, and doing release management. This file is intended
# to be included from a project's Makefile, which needs to define the following
# variables, at a minimum:
#
# * VERSION - The current version of the project in question.
# * TARGET - The desired name of the built binary.
#
# Many of the variables defined below are defined conditionally (using '?'),
# which allows the project's main Makefile to override any of these settings, if
# needed. See also:
#
# https://www.gnu.org/software/make/manual/html_node/Flavors.html#Flavors.
#
# The including Makefile may define any number of extra targets that are
# specific to that project.
VERSION ?= $(error VERSION not set in including Makefile)
TARGET ?= $(error TARGET not set in including Makefile)
SRC ?= $(shell find . -type f -name "*.go" ! -path "./.build/*")
GOOS ?= $(shell uname | tr A-Z a-z)
GOARCH ?= $(subst x86_64,amd64,$(patsubst i%86,386,$(shell uname -m)))
ifeq ($(GOOS),darwin)
RELEASE_SUFFIX ?= -osx$(shell sw_vers -productVersion)
endif
GO_VERSION ?= 1.4.2
ifeq ($(shell type go >/dev/null && go version | sed 's/.*go\([0-9.]*\).*/\1/'), $(GO_VERSION))
GOROOT := $(shell go env GOROOT)
else
GOROOT := $(CURDIR)/.build/go$(GO_VERSION)
endif
GOURL ?= https://golang.org/dl
GOPKG ?= go$(GO_VERSION).$(GOOS)-$(GOARCH)$(RELEASE_SUFFIX).tar.gz
GOPATH := $(CURDIR)/.build/gopath
GOCC ?= $(GOROOT)/bin/go
GO ?= GOROOT=$(GOROOT) GOPATH=$(GOPATH) $(GOCC)
GOFMT ?= $(GOROOT)/bin/gofmt
# Never honor GOBIN, should it be set at all.
unexport GOBIN
SUFFIX ?= $(GOOS)-$(GOARCH)
BINARY ?= $(TARGET)
ARCHIVE ?= $(TARGET)-$(VERSION).$(SUFFIX).tar.gz
ROOTPKG ?= github.com/prometheus/$(TARGET)
SELFLINK ?= $(GOPATH)/src/$(ROOTPKG)
default: $(BINARY)
$(GOCC):
@echo Go version $(GO_VERSION) required but not found in PATH.
@echo About to download and install go$(GO_VERSION) to $(GOROOT)
@echo Abort now if you want to manually install it system-wide instead.
@echo
@sleep 5
mkdir -p $(GOROOT)
curl -L $(GOURL)/$(GOPKG) | tar -C $(GOROOT) --strip 1 -xz
$(SELFLINK):
mkdir -p $(dir $@)
ln -s $(CURDIR) $@
dependencies-stamp: $(GOCC) $(SRC) | $(SELFLINK)
$(GO) get -d
touch $@
$(BINARY): $(GOCC) $(SRC) dependencies-stamp Makefile Makefile.COMMON
$(GO) build $(GOFLAGS) -o $@
.PHONY: archive
archive: $(ARCHIVE)
$(ARCHIVE): $(BINARY)
tar -czf $@ $<
.PHONY: tag
tag:
git tag $(VERSION)
git push --tags
.PHONY: test
test: $(GOCC) dependencies-stamp
$(GO) test ./...
.PHONY: format
format: $(GOCC)
find . -iname '*.go' | egrep -v "^\./\.build|./generated|\./Godeps|\.(l|y)\.go" | xargs -n1 $(GOFMT) -w -s=true
.PHONY: clean
clean:
rm -rf $(BINARY) $(ARCHIVE) .build *-stamp

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# Bind Exporter
Export Bind(named/dns) v9+ service metrics to Prometheus.
To run it:
```bash
make
./bind_exporter [flags]
```
### Flags
```bash
./bind_exporter --help
```

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package main
import (
"encoding/xml"
"flag"
"fmt"
"io/ioutil"
"net"
"net/http"
_ "net/http/pprof"
"os"
"sync"
"time"
log "github.com/Sirupsen/logrus"
logrus_syslog "github.com/Sirupsen/logrus/hooks/syslog"
"github.com/prometheus/client_golang/prometheus"
"log/syslog"
)
const (
namespace = "bind"
)
type VecInfo struct {
help string
labels []string
}
var (
gaugeMetrics = map[string]string{
// "example": "example help text",
}
counterMetrics = map[string]string{
// "example": "example help text",
}
counterVecMetrics = map[string]*VecInfo{
"incoming_requests": &VecInfo{
help: "number of inbound requests made",
labels: []string{"name"},
},
"incoming_queries": &VecInfo{
help: "number of inbound queries made",
labels: []string{"name"},
},
}
gaugeVecMetrics = map[string]*VecInfo{
/*
"example_metric": &VecInfo{
help: "help_text",
labels: []string{"extra label"},
},
*/
}
)
// Exporter collects Binds stats from the given server and exports
// them using the prometheus metrics package.
type Exporter struct {
URI string
mutex sync.RWMutex
up prometheus.Gauge
gauges map[string]*prometheus.GaugeVec
gaugeVecs map[string]*prometheus.GaugeVec
counters map[string]*prometheus.CounterVec
counterVecs map[string]*prometheus.CounterVec
client *http.Client
}
// NewExporter returns an initialized Exporter.
func NewExporter(uri string, timeout time.Duration) *Exporter {
counters := make(map[string]*prometheus.CounterVec, len(counterMetrics))
counterVecs := make(map[string]*prometheus.CounterVec, len(counterVecMetrics))
gauges := make(map[string]*prometheus.GaugeVec, len(gaugeMetrics))
gaugeVecs := make(map[string]*prometheus.GaugeVec, len(gaugeVecMetrics))
for name, info := range counterVecMetrics {
counterVecs[name] = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: name,
Help: info.help,
}, info.labels)
}
for name, info := range gaugeVecMetrics {
gaugeVecs[name] = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: namespace,
Name: name,
Help: info.help,
}, info.labels)
}
for name, help := range counterMetrics {
counters[name] = prometheus.NewCounterVec(prometheus.CounterOpts{
Namespace: namespace,
Name: name,
Help: help,
}, []string{})
}
for name, help := range gaugeMetrics {
gauges[name] = prometheus.NewGaugeVec(prometheus.GaugeOpts{
Namespace: namespace,
Name: name,
Help: help,
}, []string{})
}
// Init our exporter.
return &Exporter{
URI: uri,
up: prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: namespace,
Name: "up",
Help: "Was the Bind instance query successful?",
}),
counters: counters,
counterVecs: counterVecs,
gauges: gauges,
gaugeVecs: gaugeVecs,
client: &http.Client{
Transport: &http.Transport{
Dial: func(netw, addr string) (net.Conn, error) {
c, err := net.DialTimeout(netw, addr, timeout)
if err != nil {
return nil, err
}
if err := c.SetDeadline(time.Now().Add(timeout)); err != nil {
return nil, err
}
return c, nil
},
},
},
}
}
// Describe describes all the metrics ever exported by the bind
// exporter. It implements prometheus.Collector.
func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
ch <- e.up.Desc()
for _, vec := range e.counters {
vec.Describe(ch)
}
for _, vec := range e.gauges {
vec.Describe(ch)
}
}
// Collect fetches the stats from configured bind location and
// delivers them as Prometheus metrics. It implements prometheus.Collector.
func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
e.mutex.Lock() // To protect metrics from concurrent collects.
defer e.mutex.Unlock()
// Reset metrics.
for _, vec := range e.gauges {
vec.Reset()
}
for _, vec := range e.counters {
vec.Reset()
}
for _, vec := range e.gaugeVecs {
vec.Reset()
}
for _, vec := range e.counterVecs {
vec.Reset()
}
resp, err := e.client.Get(e.URI)
if err != nil {
e.up.Set(0)
log.Println("Error while querying Bind:", err)
return
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Println("Failed to read Bind xml response body:", err)
e.up.Set(0)
return
}
root := Isc{}
err = xml.Unmarshal([]byte(body), &root)
if err != nil {
fmt.Printf("error: %v", err)
return
}
e.up.Set(1)
serverNode := root.Bind.Statistics.Server
// Incoming Queries
for _, stat := range serverNode.Requests.Opcode {
e.counterVecs["incoming_requests"].WithLabelValues(stat.Name).Set(float64(stat.Counter))
}
// Incoming requests
for _, stat := range serverNode.QueriesIn.Rdtype {
e.counterVecs["incoming_queries"].WithLabelValues(stat.Name).Set(float64(stat.Counter))
}
// Report metrics.
ch <- e.up
for _, vec := range e.counterVecs {
vec.Collect(ch)
}
for _, vec := range e.gaugeVecs {
vec.Collect(ch)
}
for _, vec := range e.counters {
vec.Collect(ch)
}
for _, vec := range e.gauges {
vec.Collect(ch)
}
}
func initLogging() {
// Log as JSON instead of the default ASCII formatter.
log.SetFormatter(&log.JSONFormatter{})
// Output to stderr instead of stdout, could also be a file.
log.SetOutput(os.Stdout)
// Only log the warning severity or above.
//log.SetLevel(log.InfoLevel)
//Also log to syslog
hook, err := logrus_syslog.NewSyslogHook("udp", "localhost:514", syslog.LOG_INFO, "")
if err != nil {
log.Error("Unable to connect to local syslog daemon")
} else {
log.AddHook(hook)
}
}
func main() {
var (
listenAddress = flag.String("web.listen-address", ":9109", "Address to listen on for web interface and telemetry.")
metricsPath = flag.String("web.telemetry-path", "/metrics", "Path under which to expose metrics.")
bindURI = flag.String("bind.statsuri", "http://localhost:8053/", "HTTP XML API address of an Bind server.")
bindTimeout = flag.Duration("bind.timeout", 10*time.Second, "Timeout for trying to get stats from Bind.")
)
flag.Parse()
initLogging()
exporter := NewExporter(*bindURI, *bindTimeout)
prometheus.MustRegister(exporter)
log.Println("Starting Server:", *listenAddress)
http.Handle(*metricsPath, prometheus.Handler())
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
w.Write([]byte(`<html>
<head><title>Bind Exporter</title></head>
<body>
<h1>Bind Exporter</h1>
<p><a href='` + *metricsPath + `'>Metrics</a></p>
</body>
</html>`))
})
log.Fatal(http.ListenAndServe(*listenAddress, nil))
}

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package main
import (
"encoding/xml"
"fmt"
"io/ioutil"
)
func main() {
v := Isc{}
buf, err := ioutil.ReadFile("example_prod.xml")
if err != nil {
fmt.Printf("Problem reading file")
return
}
data := string(buf)
err = xml.Unmarshal([]byte(data), &v)
if err != nil {
fmt.Printf("error: %v", err)
return
}
fmt.Printf("XMLName: %#v\n", v.XMLName)
fmt.Printf("Bind: %v\n", v.Bind)
fmt.Printf("Statistics: %v\n", v.Bind.Statistics)
fmt.Printf("Views: %v\n", v.Bind.Statistics.Views)
fmt.Printf("View: %v\n", v.Bind.Statistics.Views)
fmt.Printf("View[0] name: %v\n", v.Bind.Statistics.Views[0])
fmt.Printf("View[0] Zones: %v\n", v.Bind.Statistics.Views[0].Zones)
fmt.Printf("View[0] Zones[0]: %v\n", v.Bind.Statistics.Views[0].Zones[0])
fmt.Printf("View[0] Zones[0] name: %v\n", v.Bind.Statistics.Views[0].Zones[0].Name)
fmt.Printf("View[0] Resstat: %v\n", v.Bind.Statistics.Views[0].Resstat)
fmt.Printf("View[0] Resstat[0]: %v\n", v.Bind.Statistics.Views[0].Resstat[0])
fmt.Printf("View[0] Requests: %v\n", v.Bind.Statistics.Server.Requests)
fmt.Printf("View[0] QueriesIn: %v\n", v.Bind.Statistics.Server.QueriesIn)
for _, stat := range v.Bind.Statistics.Server.Requests.Opcode {
fmt.Printf("serverNode.Requests.Opcode : %s - %d\n", stat.Name, stat.Counter)
}
for _, stat := range v.Bind.Statistics.Server.QueriesIn.Rdtype {
fmt.Printf("serverNode.Requests.Rdtype : %s - %d\n", stat.Name, stat.Counter)
}
}

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package main
import (
"encoding/xml"
)
type Zone struct {
Name string `xml:"name"`
Rdataclass string `xml:"rdataclass"`
Serial string `xml:"serial"`
//TODO a zone can also have a huge number of counters
// <counters>
}
type Stat struct {
Name string `xml:"name"`
Counter int `xml:"counter"`
}
type View struct {
Name string `xml:"name"`
Zones []Zone `xml:"zones>zone"`
Resstat []Stat `xml:"resstat"`
Rdtype []Stat `xml:"rdtype"`
}
//TODO expand
type Socket struct {
Id string `xml:"id"`
Name string `xml:"name"`
LocalAddress string `xml:"local-address"`
}
type Socketmgr struct {
References int `xml:"references"`
Sockets []Socket `xml:"sockets>socket"`
}
type Taskmgr struct {
//TODO
}
type QueriesIn struct {
Rdtype []Stat `xml:"rdtype"`
}
type Requests struct {
Opcode []Stat `xml:"opcode"`
}
type Server struct {
Requests Requests `xml:"requests"` //Most important stats
QueriesIn QueriesIn `xml:"queries-in"` //Most important stats
NsStats []Stat `xml:"nstat"`
SocketStats []Stat `xml:"socketstat"`
ZoneStats []Stat `xml:"zonestats"`
}
type Memory struct {
//TODO
}
type Statistics struct {
Views []View `xml:"views>view"`
Socketmgr Socketmgr `xml:"socketmgr"`
Taskmgr Taskmgr `xml:"taskmgr"`
Server Server `xml:"server"`
Memory Memory `xml:"memory"`
}
type Bind struct {
Statistics Statistics `xml:"statistics"`
}
type Isc struct {
XMLName xml.Name `xml:"isc"`
Bind Bind `xml:"bind"`
}