docs/docs/serving/observability/metrics/collecting-metrics.md

audience	components	function
administrator	serving	how-to

--8<-- "collecting-metrics.md"

Enabling Metric Collection

1. To enable prometheus metrics collection you will want to update config-observability ConfigMap and set the metrics-protocol to prometheus. For request-metrics we recommend setting up pushing metrics to prometheus. This requires enabling the Prometheus OLTP receiver. This is already configured in our monitoring example.

apiVersion: v1
kind: ConfigMap
metadata:
  name: config-observability
  namespace: knative-serving
data:
    # metrics-protocol field specifies the protocol used when exporting metrics
    # It supports either 'none' (the default), 'prometheus', 'http/protobuf' (OTLP HTTP), 'grpc' (OTLP gRPC)
    metrics-protocol: prometheus

    # request-metrics-protocol
    request-metrics-protocol: http/protobuf
    request-metrics-endpoint: http://knative-kube-prometheus-st-prometheus.observability.svc:9090/api/v1/otlp/v1/metrics

    tracing-protocol:      http/protobuf
    tracing-endpoint:      http://jaeger-collector.observability.svc:4318/v1/traces
    tracing-sampling-rate: "1"

1. Apply the ServiceMonitors/PodMonitors to collect metrics from Knative Serving Control Plane.

   kubectl apply -f https://raw.githubusercontent.com/knative-extensions/monitoring/main/config/serving-monitors.yaml
   

Import Grafana dashboards

1. Grafana dashboards can be imported from the monitoring repository.

2. If you are using the Grafana Helm Chart with the dashboard sidecar enabled (the default), you can load the dashboards by applying the following configmaps.

   kubectl apply -f https://raw.githubusercontent.com/knative-extensions/monitoring/main/config/configmap-serving-dashboard.yaml