Observability

Logs

All components log to stdout by default. You can use a log aggregator like Grafana Loki or the ELK Stack to collect these logs and provide a centralized overview.

Metrics

All components expose metrics in standard Prometheus format. The query and notification module do so on the :8080/actuator/prometheus endpoint and the list module on :8080/metrics.

See Kubernetes/Metrics for how to setup monitoring on Kubernetes.

Tracing

All modules support distributed tracing using OpenTelemetry. See https://github.com/opentracing-contrib/java-spring-jaeger for the notify and query module configuration and https://github.com/miracum/recruit/blob/master/src/list/server/config.js#L8 and https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/configuration/sdk-environment-variables.md for the list module setup.