Simple Java application uses the zero code instrumentation Otel Java AutoInstrumentation Agent and exports traces to a Jaeger Backend

• The application uses SpringBoot framework

Prerequisites

• Java JDK 17+, due to the use of Spring Boot 3; Java 8+ otherwise
• Gradle (w/ Kotlin support)

Build

gradle assemble

Run

Export Traces to Jaeger https://www.apollographql.com/docs/router/configuration/telemetry/exporters/tracing/jaeger/

sudo docker run --name jaeger -e COLLECTOR_OTLP_ENABLED=true   -p 16686:16686   -p 4317:4317   -p 4318:4318   jaegertracing/all-in-one:1.35

java -javaagent:libs/opentelemetry-javaagent.jar \
     -Dotel.javaagent.configuration-file=config.properties \
     -jar build/libs/java_springboot_auto_otel.jar
     --server.port=8083

(if the springboot default server.port 8080 is taken)

curl http://IP:rolldice

Jaeger UI to view the traces

http://yourIP:16686

Useful References

https://opentelemetry.io/docs/zero-code/java/agent/ https://github.com/open-telemetry/opentelemetry-java-instrumentation https://opentelemetry.io/docs/languages/java/configuration/#otlp-exporter-span-metric-and-log-exporters

https://opentelemetry.io/docs/languages/java/configuration/ https://opentelemetry.io/docs/languages/java/getting-started/ https://opentelemetry.io/docs/languages/java/instrumentation/#automatic-configuration

TODO

• Disable export of logs, metrics to avoid warnings