Slides of my presentation at EclipseCon Europe about Eclipse MicroProfile Metrics and Monitoring aspects. A video recording of the talk is available at https://youtu.be/Ep4Bkx0_MAg

1. The Monitoring and Metric
aspects of
Heiko W. Rupp
<hrupp@redhat.com>
@pilhuhn

3. About me
• I work at Red Hat
• I live in Stuttgart
• Spec lead MicroProfile Metrics
• @pilhuhn on social media

4. About MicroProfile
An open forum
to
optimize Enterprise Java
for a
microservices architecture
by
innovating across multiple implementations
and
collaborating on common areas of interest with a goal of standardisation.

5. Involved Parties

6. About MicroProfile
• Specs by the Community
• Quarterly time-boxed releases
• What is ready is in

7. About MicroProfile
• MP 1.0 (2016)
• CDI, JAX-RS, JSON-P
• MP 1.1 (2017)
• Config 1.0
• MP 1.2 (Oct 2017)
• Config 1.1, Metrics 1.0, HealthCheck 1.0, Fault-Tolerance 1.0
• JWT 1.0

8. Health Checks
• „Is my system healthy“?
• We did that manually
• Systems like Kubernetes need an M2M interface
• Check via http call
• 200-399 is healthy

9. Health Checks
@Health
public class HealthDemo implements HealthCheck {
@Override
public HealthCheckResponse call() {
HealthCheckResponseBuilder alive = HealthCheckResponse.named("alive");
// Other info
alive.withData("hello","world");
return alive.up().build();
}
}

10. Health Checks
$ curl -i http://localhost:9080/health
HTTP/1.1 200 OK
Content-Type: application/json; charset=UTF-8
Content-Language: de-DE
Content-Length: 82
Date: Thu, 19 Oct 2017 18:09:30 GMT
{„checks":[
{
„data":{"hello":"world"},
„name":"alive",
„state":"UP"
}
],
„outcome":"UP"}

11. Health Checks
< demo >

12. Metrics
• Telemetry data
• Billing / Capacity planning / graphing
• Scopes
• Base: supported by every vendor, required
• Vendor: vendor specific, optional, non portable
• Application: optional, application-specific

13. Metrics
• REST api for monitoring agents
• text/plain for Prometheus format
• application/json for a Json format
• GET for data
• OPTIONS for metadata

14. Metrics
< demo >

15. Metrics
• Java API for applications
• Formed after DropWizard Metrics
• Annotations
• CDI

16. Metrics
@Inject
Counter aCounter;
@Inject
@Metric(absolute = true, tags = „where=eclipse_con")
Histogram histogram;
@PostConstruct
public void startup() {
aCounter.inc(42);
histogram.update(42);
}

17. Metrics
@GET
@Produces("text/plain")
@Counted(description = "Counting of the Hello call",
absolute = true, tags = {"app=shop","type=counter"})
@Timed(name="helloTime",
description = "Timing of the Hello call",
absolute = true, tags = {"app=shop","type=timer"})
public Response doGet() {
aCounter.inc();
return Response.ok("Hello from MP Metrics! " + aCounter.getCount())
.build();
}

18. Metrics
< demo >

19. OpenTracing
• Classical Architecture: Monolith
• One can attach a Profiler to see what is happening
• Microservices
• Application consists of many Microservices
• A profiler on one service does not help

20. OpenTracing
DB

21. OpenTracing
DB

22. (Open)Tracing
DB
t

23. OpenTracing
• Unfortunately:
• Did not make it into MicroProfile 1.2
• => no demo

24. More…
• https://github.com/pilhuhn/microprofile-demo
• MicroProfile.io
• https://projects.eclipse.org/projects/technology.microprofile
• http://wildfly-swarm.io
• https://developers.redhat.com/blog/2017/10/17/monitoring-aspects-
eclipse-microprofile-1-2/
• https://developers.redhat.com/blog/2017/10/25/monitor-eclipse-
microprofile-1-2-server-prometheus/
• PLEASE GIVE US FEEDBACK