Jaeger Client Metrics exposed via Micrometer for Spring Boot 2.x applications
This is a simple starter project for Spring Boot including the Jaeger Client exposing its metrics via Micrometer. It also automatically opens an endpoint for Prometheus to scrap.
References:
How to get metrics
Start the application as a regular Spring Boot application, with:
$ ./mvnw spring-boot:runA message like the following should be seen in the logs:
... Mapped "{[/actuator/prometheus],methods=[GET],produces= ...If that’s the case, then Jaeger metrics should be available along with the other metrics:
$ curl localhost:8080/actuator/prometheus 2>/dev/null | grep jaeger
# HELP jaeger:reporter_spans_total
# TYPE jaeger:reporter_spans_total counter
jaeger:reporter_spans_total{result="dropped",} 0.0
jaeger:reporter_spans_total{result="ok",} 0.0
jaeger:reporter_spans_total{result="err",} 0.0
# HELP jaeger:finished_spans_total
# TYPE jaeger:finished_spans_total counter
jaeger:finished_spans_total 0.0
# HELP jaeger:sampler_queries_total
# TYPE jaeger:sampler_queries_total counter
jaeger:sampler_queries_total{result="ok",} 0.0
jaeger:sampler_queries_total{result="err",} 0.0
# HELP jaeger:sampler_updates_total
# TYPE jaeger:sampler_updates_total counter
jaeger:sampler_updates_total{result="ok",} 0.0
jaeger:sampler_updates_total{result="err",} 0.0
# HELP jaeger:baggage_restrictions_updates_total
# TYPE jaeger:baggage_restrictions_updates_total counter
jaeger:baggage_restrictions_updates_total{result="ok",} 0.0
jaeger:baggage_restrictions_updates_total{result="err",} 0.0
# HELP jaeger:baggage_truncations_total
# TYPE jaeger:baggage_truncations_total counter
jaeger:baggage_truncations_total 0.0
# HELP jaeger:started_spans_total
# TYPE jaeger:started_spans_total counter
jaeger:started_spans_total{sampled="n",} 0.0
jaeger:started_spans_total{sampled="y",} 0.0
# HELP jaeger:span_context_decoding_errors_total
# TYPE jaeger:span_context_decoding_errors_total counter
jaeger:span_context_decoding_errors_total 0.0
# HELP jaeger:traces_total
# TYPE jaeger:traces_total counter
jaeger:traces_total{sampled="n",state="started",} 0.0
jaeger:traces_total{sampled="y",state="started",} 0.0
jaeger:traces_total{sampled="n",state="joined",} 0.0
jaeger:traces_total{sampled="y",state="joined",} 0.0
# HELP jaeger:baggage_updates_total
# TYPE jaeger:baggage_updates_total counter
jaeger:baggage_updates_total{result="ok",} 0.0
jaeger:baggage_updates_total{result="err",} 0.0
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