Prometheus Trait

The Prometheus trait configures a Prometheus-compatible endpoint. This trait also exposes the integration with Service and ServiceMonitor resources, so that the endpoint can be scraped automatically, when using the Prometheus Operator.

The metrics exposed vary depending on the configured runtime. With the default Quarkus runtime, metrics are exposed using MicroProfile Metrics. While with the Java main runtime, metrics are exposed using the Prometheus JMX exporter.

The creation of the ServiceMonitor resource requires the Prometheus Operator custom resource definition to be installed. You can set service-monitor to false for the Prometheus trait to work without the Prometheus Operator.

The Prometheus trait is disabled by default.

This trait is available in the following profiles: Kubernetes, Knative, OpenShift.


Trait properties can be specified when running any integration with the CLI:

kamel run --trait prometheus.[key]=[value] --trait prometheus.[key2]=[value2] integration.groovy

The following configuration options are available:

Property Type Description



Can be used to enable or disable a trait. All traits share this common property.



The Prometheus endpoint port (default 9779, or 8080 with Quarkus).



Whether a ServiceMonitor resource is created (default true).



The ServiceMonitor resource labels, applicable when service-monitor is true.



To use a custom ConfigMap containing the Prometheus JMX exporter configuration (under the content ConfigMap key). When this property is left empty (default), Camel K generates a standard Prometheus configuration for the integration. It is not applicable when using Quarkus.