forked from miolini/rabbitmq-graphite-tool
/
rabbitmq-graphite-tool.go
256 lines (238 loc) · 8.35 KB
/
rabbitmq-graphite-tool.go
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package main
import "log"
import "flag"
import "time"
import "strings"
import "net"
import "net/http"
import "io/ioutil"
import "strconv"
import "reflect"
import "encoding/json"
import "github.com/streadway/amqp"
import "github.com/marpaia/graphite-golang"
func rabbitmqConnect(uri string, queueName string) (queueConnection *amqp.Connection, queueChannel *amqp.Channel, err error) {
queueConnection, err = amqp.Dial(uri)
if err == nil {
queueChannel, err = queueConnection.Channel();
}
return
}
func nonFatalError(msg string, err error, pauseMsec int) bool {
if err == nil {
return false
}
log.Printf("non-fatal error - %s: %s", msg, err)
time.Sleep(time.Millisecond * time.Duration(pauseMsec))
return true
}
func fetchUrl(requestUrl string) (body []byte, statusCode int, err error) {
resp, err := http.Get(requestUrl)
if err != nil {
return
}
defer resp.Body.Close()
statusCode = resp.StatusCode
body, err = ioutil.ReadAll(resp.Body)
return
}
func findObject(query string, obj interface{}) (item interface{}) {
if reflect.ValueOf(obj).Kind() != reflect.Map {
return
}
i := strings.Index(query, ".")
objMap := obj.(map[string]interface{})
if i == -1 {
item, _ = objMap[query]
} else {
item = findObject(query[i+1:], objMap[query[:i]])
}
return
}
func findNumber(query string, obj interface{}) (result float64) {
item := findObject(query, obj)
if item != nil {
result = item.(float64)
}
return
}
func findString(query string, obj interface{}) (result string) {
item := findObject(query, obj)
if item != nil {
result = item.(string)
}
return
}
func fetchQueueMetrics(mgmtUri string, prefix string) (metrics []graphite.Metric) {
url := mgmtUri + "/api/queues"
response, statusCode, err := fetchUrl(url)
if err != nil || statusCode != 200 {
log.Printf("error fetch rabbiqmq queues: %d - %s", statusCode, err)
return
}
var stats []interface{}
json.Unmarshal(response, &stats)
for _, stat := range stats {
name := findString("name", stat)
if name == "" {
continue
}
rate_publish := findNumber("message_stats.publish_details.rate", stat)
rate_get := findNumber("message_stats.deliver_get_details.rate", stat)
rate_noack := findNumber("message_stats.deliver_no_ack_details.rate", stat)
msg_ready := findNumber("messages_ready", stat)
msg_unack := findNumber("messages_unacknowledged", stat)
metric := graphite.Metric{Name:prefix+"queue."+name+".rate_publish",
Value:strconv.Itoa(int(rate_publish)),Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
metric = graphite.Metric{Name:prefix+"queue."+name+".rate_get",
Value:strconv.Itoa(int(rate_get)),Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
metric = graphite.Metric{Name:prefix+"queue."+name+".rate_noack",
Value:strconv.Itoa(int(rate_noack)),Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
metric = graphite.Metric{Name:prefix+"queue."+name+".msg_ready",
Value:strconv.Itoa(int(msg_ready)),Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
metric = graphite.Metric{Name:prefix+"queue."+name+".msg_unack",
Value:strconv.Itoa(int(msg_unack)),Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
}
return
}
func fetchExchangeMetrics(mgmtUri string, prefix string) (metrics []graphite.Metric) {
url := mgmtUri + "/api/exchanges"
response, statusCode, err := fetchUrl(url)
if err != nil || statusCode != 200 {
log.Printf("error fetch rabbiqmq queues: %d - %s", statusCode, err)
return
}
var stats []interface{}
json.Unmarshal(response, &stats)
for _, stat := range stats {
name := findString("name", stat)
if name == "" {
continue
}
rate_in := findNumber("message_stats.publish_in_details.rate", stat)
rate_out := findNumber("message_stats.publish_out_details.rate", stat)
metric := graphite.Metric{Name:prefix+"exchange."+name+".rate_in",
Value:strconv.Itoa(int(rate_in)),
Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
metric = graphite.Metric{Name:prefix+"exchange."+name+".rate_out",
Value:strconv.Itoa(int(rate_out)),
Timestamp:time.Now().Unix()}
metrics = append(metrics, metric)
}
return
}
func monitoring(uri string, queueName string, mgmtUri string, prefix string) {
var (
queueConn *amqp.Connection
queueChan *amqp.Channel
err error
)
queueConn, queueChan, err = rabbitmqConnect(uri, queueName)
if err != nil {
return
}
for {
log.Printf("fetch rabbitmq stats")
var metrics []graphite.Metric
for _, metric := range fetchQueueMetrics(mgmtUri, prefix) {
metrics = append(metrics, metric)
}
for _, metric := range fetchExchangeMetrics(mgmtUri, prefix) {
metrics = append(metrics, metric)
}
for _, metric := range metrics {
body := []byte( metric.Name+"\t"+metric.Value+"\t"+strconv.FormatInt(metric.Timestamp, 10))
msg := amqp.Publishing{ContentType:"text/plain",Body:body}
err = queueChan.Publish("", queueName, false, false, msg)
if err != nil {
log.Printf("publish err: %s", err)
return
}
//log.Printf("metric\t%s\t\t%s", metric.Name, metric.Value)
}
time.Sleep(time.Second * 5)
}
queueChan.Close()
queueConn.Close()
}
func metricListen(uri string, queueName string, graphiteHost string, graphitePort int) (err error) {
queueConn, queueChan, err := rabbitmqConnect(uri, queueName)
if nonFatalError("can't connect to rabbitmq", err, 5000) {
return
}
defer queueConn.Close()
defer queueChan.Close()
msgs, err := queueChan.Consume(queueName, "", true, false, false, false, nil)
if err != nil {
return
}
graphiteConn, err := graphite.NewGraphite(graphiteHost, graphitePort)
if err != nil {
return
}
for msg := range msgs {
data := strings.Split(string(msg.Body), "\t")
timestamp, _ := strconv.ParseInt(data[2], 10, 64)
//log.Printf("metric: %s = %s", data[0], data[1])
metric := graphite.Metric{Name:data[0],Value:data[1],Timestamp:timestamp}
err = graphiteConn.SendMetric(metric)
if err != nil {
return
}
}
return
}
func main() {
log.Printf("Welcome to rabbitmq-graphite-tool")
var (
queue string
uri string
mgmtUri string
graphite string
prefix string
err error
)
flag.StringVar(&queue,
"rabbitmq-queue", "graphite", "incoming queue name for graphite metrics")
flag.StringVar(&uri,
"rabbitmq-uri", "amqp://guest:guest@localhost:5672", "rabbitmq connection uri")
flag.StringVar(&mgmtUri,
"rabbitmq-mgmt-uri",
"http://guest:guest@localhost:15672", "rabbitmq managment plugin address host:port")
flag.StringVar(&graphite,
"graphite", "localhost:2003", "graphite server address host:port")
flag.StringVar(&prefix,
"prefix", "rabbitmq.node01.", "prefix for rabbitmq monitoring in graphite")
flag.Parse()
log.Printf("rabbitmq-queue: %s", queue)
log.Printf("rabbitmq-uri: %s", uri)
log.Printf("rabbitmq-mgmt-uri: %s", mgmtUri)
log.Printf("graphite-addr: %s", graphite)
log.Printf("prefix: %s", prefix)
graphiteHost, _graphitePort, err := net.SplitHostPort(graphite)
if err != nil {
log.Fatalf("can't parse graphite host:port: %s", graphite)
return
}
graphitePort, _ := strconv.Atoi(_graphitePort)
go func () {
for {
log.Printf("start monitoring")
monitoring(uri, queue, mgmtUri, prefix)
time.Sleep(time.Second)
}
}()
for {
err = metricListen(uri, queue, graphiteHost, graphitePort)
if err != nil {
log.Printf("err: %s", err)
time.Sleep(time.Second)
}
}
}