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newrelic.go
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newrelic.go
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package emitter
import (
"bytes"
"compress/gzip"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"strings"
"time"
"code.cloudfoundry.org/lager"
"github.com/pf-qiu/concourse/v6/atc/metric"
"github.com/pkg/errors"
)
type (
stats struct {
created interface{}
deleted interface{}
}
NewRelicEmitter struct {
Client *http.Client
Url string
apikey string
prefix string
checks *stats
containers *stats
volumes *stats
BatchSize int
BatchDuration time.Duration
DisableCompression bool
LastEmitTime time.Time
NewRelicBatch []NewRelicEvent
}
NewRelicConfig struct {
AccountID string `long:"newrelic-account-id" description:"New Relic Account ID"`
APIKey string `long:"newrelic-api-key" description:"New Relic Insights API Key"`
Url string `long:"newrelic-insights-api-url" default:"https://insights-collector.newrelic.com" description:"Base Url for insights Insert API"`
ServicePrefix string `long:"newrelic-service-prefix" default:"" description:"An optional prefix for emitted New Relic events"`
BatchSize uint64 `long:"newrelic-batch-size" default:"2000" description:"Number of events to batch together before emitting"`
BatchDuration time.Duration `long:"newrelic-batch-duration" default:"60s" description:"Length of time to wait between emitting until all currently batched events are emitted"`
DisableCompression bool `long:"newrelic-batch-disable-compression" description:"Disables compression of the batch before sending it"`
}
NewRelicEvent map[string]interface{}
)
func init() {
metric.Metrics.RegisterEmitter(&NewRelicConfig{})
}
func (config *NewRelicConfig) Description() string { return "NewRelic" }
func (config *NewRelicConfig) IsConfigured() bool {
return config.AccountID != "" && config.APIKey != ""
}
func (config *NewRelicConfig) NewEmitter() (metric.Emitter, error) {
client := &http.Client{
Transport: &http.Transport{Proxy: http.ProxyFromEnvironment},
Timeout: time.Minute,
}
return &NewRelicEmitter{
Client: client,
Url: fmt.Sprintf("%s/v1/accounts/%s/events", config.Url, config.AccountID),
apikey: config.APIKey,
prefix: config.ServicePrefix,
containers: new(stats),
volumes: new(stats),
checks: new(stats),
BatchSize: int(config.BatchSize),
BatchDuration: config.BatchDuration,
DisableCompression: config.DisableCompression,
LastEmitTime: time.Now(),
NewRelicBatch: make([]NewRelicEvent, 0),
}, nil
}
func (emitter *NewRelicEmitter) Emit(logger lager.Logger, event metric.Event) {
logger = logger.Session("new-relic")
switch event.Name {
// These are the simple ones that only need a small name transformation
case "build started",
"build finished",
"checks finished",
"checks started",
"checks enqueued",
"checks queue size",
"worker containers",
"worker volumes",
"concurrent requests",
"concurrent requests limit hit",
"http response time",
"database queries",
"database connections",
"worker unknown containers",
"worker unknown volumes",
"volumes streamed":
emitter.NewRelicBatch = append(emitter.NewRelicBatch, emitter.transformToNewRelicEvent(event, ""))
// These are periodic metrics that are consolidated and only emitted once
// per cycle (the emit trigger is chosen because it's currently last in the
// periodic list, so we should have a coherent view). We do this because
// new relic has a hard limit on the total number of metrics in a 24h
// period, so batching similar data where possible makes sense.
case "checks deleted":
emitter.checks.deleted = event.Value
case "containers deleted":
emitter.containers.deleted = event.Value
case "containers created":
emitter.containers.created = event.Value
case "failed containers":
singleEvent := emitter.transformToNewRelicEvent(event, "containers")
singleEvent["failed"] = singleEvent["value"]
singleEvent["created"] = emitter.containers.created
singleEvent["deleted"] = emitter.containers.deleted
delete(singleEvent, "value")
emitter.NewRelicBatch = append(emitter.NewRelicBatch, singleEvent)
case "volumes deleted":
emitter.volumes.deleted = event.Value
case "volumes created":
emitter.volumes.created = event.Value
case "failed volumes":
singleEvent := emitter.transformToNewRelicEvent(event, "volumes")
singleEvent["failed"] = singleEvent["value"]
singleEvent["created"] = emitter.volumes.created
singleEvent["deleted"] = emitter.volumes.deleted
delete(singleEvent, "value")
emitter.NewRelicBatch = append(emitter.NewRelicBatch, singleEvent)
// And a couple that need a small rename (new relic doesn't like some chars)
case "scheduling: full duration (ms)":
emitter.NewRelicBatch = append(emitter.NewRelicBatch, emitter.transformToNewRelicEvent(event,
"scheduling_full_duration_ms"))
case "scheduling: loading versions duration (ms)":
emitter.NewRelicBatch = append(emitter.NewRelicBatch, emitter.transformToNewRelicEvent(event,
"scheduling_load_duration_ms"))
case "scheduling: job duration (ms)":
emitter.NewRelicBatch = append(emitter.NewRelicBatch, emitter.transformToNewRelicEvent(event,
"scheduling_job_duration_ms"))
default:
// Ignore the rest
}
duration := time.Since(emitter.LastEmitTime)
if len(emitter.NewRelicBatch) >= emitter.BatchSize || duration >= emitter.BatchDuration {
logger.Debug("pre-emit-batch", lager.Data{
"batch-size": emitter.BatchSize,
"current-batch-size": len(emitter.NewRelicBatch),
"batch-duration": emitter.BatchDuration,
"current-duration": duration,
})
emitter.submitBatch(logger)
}
}
// NewRelic has strict requirements around the structure of the events
// Keys must be alphanumeric and can contain hyphens or underscores
// Values must be sting, int, or unix timestamps. No maps/arrays.
func (emitter *NewRelicEmitter) transformToNewRelicEvent(event metric.Event, nameOverride string) NewRelicEvent {
name := nameOverride
if name == "" {
name = strings.Replace(event.Name, " ", "_", -1)
}
eventType := emitter.prefix + name
payload := NewRelicEvent{
"eventType": eventType,
"value": event.Value,
"host": event.Host,
"timestamp": event.Time.Unix(),
}
for k, v := range event.Attributes {
payload["_"+k] = v
}
return payload
}
func (emitter *NewRelicEmitter) submitBatch(logger lager.Logger) {
batchToSubmit := make([]NewRelicEvent, len(emitter.NewRelicBatch))
copy(batchToSubmit, emitter.NewRelicBatch)
emitter.NewRelicBatch = make([]NewRelicEvent, 0)
emitter.LastEmitTime = time.Now()
go emitter.emitBatch(logger, batchToSubmit)
}
func (emitter *NewRelicEmitter) emitBatch(logger lager.Logger, payload []NewRelicEvent) {
batch, err := emitter.marshalJSON(logger, payload)
if err != nil {
logger.Error("failed-to-marshal-batch", err)
return
}
req, err := http.NewRequest("POST", emitter.Url, batch)
if err != nil {
logger.Error("failed-to-construct-request", err)
return
}
req.Header.Add("Content-Type", "application/json")
req.Header.Add("X-Insert-Key", emitter.apikey)
if !emitter.DisableCompression {
req.Header.Add("Content-Encoding", "gzip")
}
resp, err := emitter.Client.Do(req)
defer resp.Body.Close()
if err != nil {
logger.Error("failed-to-send-request",
errors.Wrap(metric.ErrFailedToEmit, err.Error()))
return
}
if resp.StatusCode < 200 || resp.StatusCode > 299 {
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
logger.Info("failed-to-read-response-body",
lager.Data{"error": err.Error(), "status-code": resp.StatusCode})
return
}
logger.Info("received-non-2xx-response-status-code",
lager.Data{"response-body": string(bodyBytes), "status-code": resp.StatusCode})
return
}
}
func (emitter *NewRelicEmitter) marshalJSON(logger lager.Logger, batch []NewRelicEvent) (io.Reader, error) {
var batchJson *bytes.Buffer
if emitter.DisableCompression {
marshaled, err := json.Marshal(batch)
if err != nil {
logger.Error("failed-to-serialize-payload", err)
return nil, err
}
batchJson = bytes.NewBuffer(marshaled)
} else {
batchJson = bytes.NewBuffer([]byte{})
encoder := gzip.NewWriter(batchJson)
defer encoder.Close()
err := json.NewEncoder(encoder).Encode(batch)
if err != nil {
logger.Error("failed-to-compress-and-serialize-payload", err)
return nil, err
}
}
return batchJson, nil
}