This example demonstrates how to use the OpenTelemetry SDK to instrument a simple application using Prometheus as the metric exporter and expose the metrics via HTTP.
These are collected by a Prometheus instance which is configured to pull these metrics via HTTP.
- Java 1.7
- Docker 19.03
- Docker compose
../gradlew shadowJarStart the application and prometheus via docker compose
docker-compose upTo view metrics in prometheus, navigate to:
http://localhost:9090/graph?g0.range_input=15m&g0.expr=incoming_messages&g0.tab=0
To fetch application metrics in prometheus format, run:
curl localhost:19090/metrics
To fetch application metrics in OpenMetrics format, which includes exemplars, run:
curl -H 'Accept: application/openmetrics-text; version=1.0.0; charset=utf-8' localhost:19090/metrics