/quarkus-otel-missing-examplar-example

Demo missing exemplars in HTTP metrics

Primary LanguageJava

Quarkus OTEL HTTP Metrics with exemplars

This is to show-case that HTTP metrics don't show exemplars.

This accompanies the following GitHub issue:

# build JAR
./mvnw package
# run JAR in background
java -jar target/quarkus-app/quarkus-run.jar &
# Access the HTTP server
curl http://localhost:8080
# Retrieve the metric
curl http://localhost:8080/q/metrics | grep "^http_server_requests_seconds_count"

Actual output:

http_server_requests_seconds_count{method="GET",outcome="SUCCESS",status="200",uri="root"} 1.0

Expected output:

http_server_requests_seconds_count{method="GET",outcome="SUCCESS",status="200",uri="root"} 1.0 # {span_id="a423857f2c2564f6",trace_id="a4d9bca798183c42aff30d54691df2ff"} 1.0 1729084389.503

NOTE: There is a partially patched Http1xServerConnection.txt file that can be renamed to Http1xServerConnection.java to try out the fix locally.

Running the application in dev mode

You can run your application in dev mode that enables live coding using:

./mvnw compile quarkus:dev

NOTE: Quarkus now ships with a Dev UI, which is available in dev mode only at http://localhost:8080/q/dev/.

Packaging and running the application

The application can be packaged using:

./mvnw package

It produces the quarkus-run.jar file in the target/quarkus-app/ directory. Be aware that it’s not an über-jar as the dependencies are copied into the target/quarkus-app/lib/ directory.

The application is now runnable using java -jar target/quarkus-app/quarkus-run.jar.

If you want to build an über-jar, execute the following command:

./mvnw package -Dquarkus.package.jar.type=uber-jar

The application, packaged as an über-jar, is now runnable using java -jar target/*-runner.jar.

Creating a native executable

You can create a native executable using:

./mvnw package -Dnative

Or, if you don't have GraalVM installed, you can run the native executable build in a container using:

./mvnw package -Dnative -Dquarkus.native.container-build=true

You can then execute your native executable with: ./target/otel-exemplar-1.0.0-SNAPSHOT-runner

If you want to learn more about building native executables, please consult https://quarkus.io/guides/maven-tooling.

Related Guides

  • OpenTelemetry (guide): Use OpenTelemetry to trace services
  • Micrometer metrics (guide): Instrument the runtime and your application with dimensional metrics using Micrometer.