Dashboard

Dashboard

LogHub provides a simple dashboard. The home page provides a few simple metrics that shows the current traffic. It’s activated when the property http.port is set.

Jolokia

If the jar loghub-jolokia.jar from the module loghub-jolokia is installed, LogHub will export internal JMX metrics using Jolokia. The usual Jolokia URL are mapped under /jolokia.

It’s configured with the following properties.

• http.jolokia.policyLocation

Prometheus

If the jar loghub-prometheus.jar from the module loghub-prometheus is installed, LogHub will export internal JMX metrics using Prometheus’ client_java.

If the property http.prometheus.withExporter is set to true, a Prometheus exporter is created and listen at the /prometheus end point.

If the property http.prometheus.withOpenTelemetry is set to true, metrics will be pushed using the OTLP protocol. It’s configured with the following properties, they are explain at Exporter OpenTelemetry Properties

• http.prometheus.openTelemetry.endpoint
• http.prometheus.openTelemetry.headers
• http.prometheus.openTelemetry.interval
• http.prometheus.openTelemetry.protocol
• http.prometheus.openTelemetry.resourceAttributes
• http.prometheus.openTelemetry.serviceInstanceId
• http.prometheus.openTelemetry.serviceName
• http.prometheus.openTelemetry.serviceNamespace
• http.prometheus.openTelemetry.serviceVersion
• http.prometheus.openTelemetry.timeoutSeconds

The properties http.prometheus.openTelemetry.resourceAttributes and http.prometheus.openTelemetry.headers are declared using LogHub’s map, not the format described in Prometheus’ description.

To export basic JVM metrics, the property http.prometheus.withJvmMetrics must be set to true.