log-appender

OpenTelemetry Log Appender Example

This example demonstrates an application configured to use the OpenTelemetry log appenders to bridge logs into the OpenTelemetry Log SDK and export via OTLP.

Details about the example:

• The OpenTelemetry Log SDK is configured to export data to the Collector, which prints the logs to the console
• The application is configured with a variety of log solutions:
  • Log4j API configured to print logs to the console and the OpenTelemetry Log4j Appender
  • SLF4J API configured with Logback to print logs to the console and the OpenTelemetry Logback Appender
  • JUL to SLF4J, which bridges JUL logs to the SLF4J API and ultimately to Logback
• Demonstrates how trace context is propagated to logs when recorded within a span

Prerequisites

• Java 17 or higher is required to run Gradle and build this example
• Java 11 or higher is required to run the compiled example
• Docker Compose

How to Run

Run the Collector via Docker:

docker compose up

In a separate shell, run the application:

../gradlew run

Watch the Collector logs to see exported log records.