Hidden Secrets about Instrumenting JVMs for OpenTelemetry Ricardo Ferreira @riferrei

OpenTelemetry Crash Source @riferrei

opentelemetry overview @riferrei

Quick Demo https://github.com/riferrei/otel-with-java @riferrei

Much better now đź‘Ť @riferrei

Ricardo Ferreira Developer Advocate q Elastic Community Team q HashiCorp Ambassador q Before working for Elastic: Confluent, Oracle, Red Hat q Distributed Systems, O11y, Streaming Systems, databases q riferrei@elastic.co q riferrei@riferrei.com @riferrei

JVM Instrumentation options java -javaagent:./${OTEL_AGENT} \ -Dotel.traces.exporter=otlp \ -Dotel.metrics.exporter=otlp \ -jar target/app.jar 80% @riferrei API, SDK, SDK-Extensions 20%

Manual Instrumentation @riferrei

Manual Instrumentation <dependency> <groupId>io.opentelemetry</groupId> <artifactId>opentelemetry-sdk-extension-autoconfigure</artifactId> <version>${version}</version> </dependency> @riferrei

Down the river via @WithSpan <dependency> <groupId>io.opentelemetry</groupId> <artifactId>opentelemetry-extension-annotations</artifactId> <version>${version}</version> </dependency> @WithSpan public void someMethod() { } @riferrei

Disabling auto instrumentation -Dotel.instrumentation.common.default-enabled=false @riferrei

Enabling only manual instrumentation -Dotel.instrumentation.opentelemetry-annotations.enabled=true @riferrei

Meaningful names for services -Dotel.resource.attributes=service.name= \ brand-estimator,service.version=1.0 @riferrei

Meaningful names for services export OTEL_RESOURCE_ATTRIBUTES=service.name= \ brand-estimator,service.version=1.0 @riferrei

Making your traces observable @riferrei

Using Text-Map-Propagators @riferrei

Using Text-Map-Propagators @riferrei

Using Text-Map-Propagators @riferrei

Can I tell you a secret? SELECT a FROM b WHERE password=? SELECT a FROM b WHERE password=”secret” @riferrei

Databases can be a bit chatty java.sql.Datasource#getConnection() -Dotel.instrumentation.jdbc-datasource.enabled=true @riferrei

Excluding noisy frameworks @riferrei

Using the batch-Span-Processor @riferrei

Planning your sampling strategy @riferrei

Debugging the Agent -Dotel.javaagent.debug=true export OTEL_JAVAAGENT_DEBUG=true @riferrei

Disabling the agent -Dotel.javaagent.enabled=false export OTEL_JAVAAGENT_ENABLED=false @riferrei

Observable metrics: no pun intended @riferrei

Inspecting telemetry data with jMC <dependency> <groupId>io.opentelemetry</groupId> <artifactId>opentelemetry-sdk-extension-jfr-events</artifactId> <version>${version}</version> </dependency> @riferrei

THANK YOU Ricardo Ferreira @riferrei