1. │©2022 VMware, Inc.
Observability of Your
Application
Jonatan Ivanov
Tommy Ludwig
Marcin Grzejszczak

2. Spring Observability Team
Jonatan Ivanov
Tommy Ludwig
Marcin Grzejszczak

3. Architecture
Tea Service
Tealeaf
Service
DB
Water
Service
DB
Eureka
Eureka

4. DEMO

5. Summary
- We’ve managed to correlate
- Logs to Traces (and vice versa)
- Traces to Metrics (via common tags)
- Metrics to Traces (via exemplars) to Logs
- The Spring portfolio is instrumented
- WebMVC, WebFlux, etc. instrumentation
- Third-party libraries are also instrumented
- jdbc-observations
- OpenFeign
- etc.

6. What’s (kind of) new in Micrometer?
1.9.0 - 2022 May
- OTLP Registry (OpenTelemetry)
- HighCardinalityTagsDetector
- Exemplars (Prometheus)

7. What’s new in Micrometer?
1.10.0 - 2022 November
- Micrometer Tracing (Sleuth w/o Spring deps.)
- Micrometer Docs Generator
- Micrometer Context Propagation
- Observation API (micrometer-core)

8. Observation observation = Observation.start("s1",registry);
try (Observation.Scope scope = observation.openScope()) {
Thread.sleep(1000); // Business logic
}
catch (Exception exception) {
observation.error(exception);
throw exception;
}
finally { // TODO: attach tags (key-value)
observation.stop();
}
Observation API (Micrometer 1.10)

9. ObservationRegistry registry = ObservationRegistry.create();
registry.observationConfig()
.observationHandler(new MeterHandler(...))
.observationHandler(new TracingHandler(...))
.observationHandler(new LoggingHandler(...))
.observationHandler(new AuditEventHandler(...));
Observation observation = Observation.start("s1",registry);
// let the fun begin…
observation.stop();
Observation API (Micrometer 1.10)

10. Observation.createNotStarted("talk",registry)
.lowCardinalityKeyValue("conference", "S1")
.highCardinalityKeyValue("speakerId", speakerId)
.observe(this::talk);
@Observed
Observation API (Micrometer 1.10)

11. │©2022 VMware, Inc.
Thank You!
github.com/jonatan-ivanov/teahouse