Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
La métrologie dans les applications Scala
Search
Matthieu Guillermin
October 28, 2016
Programming
0
140
La métrologie dans les applications Scala
Talk Scala.IO 2016
Matthieu Guillermin
October 28, 2016
Tweet
Share
Other Decks in Programming
See All in Programming
「待たせ上手」なスケルトンスクリーン、 そのUXの裏側
teamlab
PRO
0
520
Amazon RDS 向けに提供されている MCP Server と仕組みを調べてみた/jawsug-okayama-2025-aurora-mcp
takahashiikki
1
110
開発チーム・開発組織の設計改善スキルの向上
masuda220
PRO
20
11k
testingを眺める
matumoto
1
140
今だからこそ入門する Server-Sent Events (SSE)
nearme_tech
PRO
3
200
MCPとデザインシステムに立脚したデザインと実装の融合
yukukotani
4
1.4k
複雑なドメインに挑む.pdf
yukisakai1225
5
1.2k
Rancher と Terraform
fufuhu
2
400
為你自己學 Python - 冷知識篇
eddie
1
350
さようなら Date。 ようこそTemporal! 3年間先行利用して得られた知見の共有
8beeeaaat
3
1.4k
AIを活用し、今後に備えるための技術知識 / Basic Knowledge to Utilize AI
kishida
22
5.8k
Putting The Genie in the Bottle - A Crash Course on running LLMs on Android
iurysza
0
140
Featured
See All Featured
Design and Strategy: How to Deal with People Who Don’t "Get" Design
morganepeng
131
19k
Optimizing for Happiness
mojombo
379
70k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
520
Done Done
chrislema
185
16k
A Tale of Four Properties
chriscoyier
160
23k
Making Projects Easy
brettharned
117
6.4k
Raft: Consensus for Rubyists
vanstee
140
7.1k
How to Ace a Technical Interview
jacobian
279
23k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
194
16k
Building Better People: How to give real-time feedback that sticks.
wjessup
368
19k
Become a Pro
speakerdeck
PRO
29
5.5k
CoffeeScript is Beautiful & I Never Want to Write Plain JavaScript Again
sstephenson
162
15k
Transcript
La métrologie dans les applications Scala Matthieu Guillermin Scala.IO 2016
Matthieu Guillermin Lead Dev Brainify - Analytics e-commerce
Est-ce que mon service fonctionne ? Est-ce que les temps
de réponse sont corrects ? Est-ce que mon service renvoie des erreurs 500 ? Il y a beaucoup d'erreurs, qu'est-ce qui cloche ? « Ça fait 1 heure que l'appli ne fonctionne plus, qu'est-ce qu'il se passe ? »
Logs • Disponible dans toutes les applications • Très détaillé
• Difficile à exploiter • Difficile d'avoir une vision synthétique
Métriques • Valeurs numériques • Facile à stocker • Facile
à exploiter • Affichage • Triggers / Alertes
Statsd / Graphite Cabot Service A Kamon Service B Kamon
Service C Kamon Grafana system C* ES Kafka Kong
Enregistrement des métriques
Kamon • JVM / Scala • Reactive-friendly • Modulaire •
http://kamon.io
Kamon - Metrics • Flush interval • Instruments • Counter
• Histogram • ...
// Counter val authCounter = Kamon.metrics.counter("auth") def auth(username: String, password:
String) = { authCounter.increment() // ... } // Histogram val docSizeHistogram = Kamon.metrics.histogram("doc-size") def storeDocument(doc: Document) = { docSizeHistogram.record(doc.size) // ... }
Kamon - Trace • Enregistrement du "temps passé" • Granularité
: Traces / Segments
def userCreate(user: User) = { val context = Kamon.tracer.newContext("userCreate") //
... validateUser(user) // ... context.finish() } def validateUser(user: User) = { val segment = Tracer.currentContext.startSegment("validateUser", "myCategory", "myLib") // ... segment.finish() }
def userCreate(user: User) = { Tracer.withNewContext("userCreate", autoFinish = true) {
validateUser(user) // ... } } def validateUser(user: User) = { Tracer.currentContext.withNewSegment("validateUser", "cat", "lib") { // ... } }
def notifyUser(user: User) = { Tracer.currentContext.withNewAsyncSegment("notifyUser", "cat", "lib") { sendEmail(user.email)
// sendEmail() is returning a Future } }
Kamon - Intégrations • JVM : • Heap, GC, ...
• Akka : Metrics sur Actor, Router, Dispatcher • Ex : time-in-mailbox, processing-time, errors,... • Play : Metrics sur requêtes HTTP • Ex : requêtes entrantes, WSClient,...
class User @Inject()(val userService: UserService) extends Controller { def create(username:
String, password: String) = TraceName("user-create") { Action.async { userService.create(username, password) .map(user => Ok(Json.toJson(user))) } } }
kamon { statsd { hostname = my.statsd.server flush-interval = 1
minute simple-metric-key-generator { application = "my-service" } } metric { tick-interval = 1 minute filters { akka-actor { includes = ["application/user/**"] # excludes = [] } } } system-metrics { sigar-enabled = false jmx-enabled = true } }
Visualisation des métriques
Grafana • Visualisation des métriques • Dashboards • Templating /
annotations • http://grafana.org/
None
None
None
Alerting
Alerting • Etre alerté d'un incident - hits / last
2 minutes = 0 - 2xx_status = 0
Alerting • Prévenir un incident - heap_usage > 90% -
disk_free < 10% - response_time > 200ms
Cabot • Services / Checks • ICMP / HTTP /
Graphite • Notifications • Slack • Twilio (SMS / Phone) http://cabotapp.com/
None
None
None
None
Conclusion • Mettre en place de la métrologie • Investissement
qui en vaut la peine • Simple • Dev + Ops • Processus itératif