Enable generic metric scraping¶
StackLight can scrape metrics from any service that exposes Prometheus metrics
and is running on the Kubernetes cluster. Such metrics appear in Prometheus
under the
{job="stacklight-generic",service="<service_name>",namespace="<service_namespace>"}
set of labels. If the Kubernetes service is backed by Kubernetes pods, the set
of labels also includes {pod="<pod_name>"}.
To enable the functionality, define at least one of the following annotations in the service metadata:
"generic.stacklight.mirantis.com/scrape-port"- the HTTP endpoint port. By default, the port number found through Kubernetes service discovery, usually __meta_kubernetes_pod_container_port_number. If none discovered, use the default port for the chosen scheme."generic.stacklight.mirantis.com/scrape-path"- the HTTP endpoint path, related to the Prometheusscrape_config.metrics_pathoption. By default,/metrics."generic.stacklight.mirantis.com/scrape-scheme"- the HTTP endpoint scheme between HTTP and HTTPS, related to the Prometheusscrape_config.schemeoption. By default,http.
For example:
metadata:
annotations:
"generic.stacklight.mirantis.com/scrape-path": "/metrics"
metadata:
annotations:
"generic.stacklight.mirantis.com/scrape-port": "8080"