custom metrics and alerting content

alert.yaml

apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: example-alert
spec:
  groups:
  - name: example
    rules:
    - alert: TooManyErrorAlert
      expr: http_requests_total{code="404"} > 10

enable-custom-metrics-configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: cluster-monitoring-config
  namespace: openshift-monitoring
data:
  config.yaml: |
    techPreviewUserWorkload:
      enabled: true

monitor.yaml

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: example-monitor
spec:
  endpoints:
  - interval: 30s
    port: 8080-tcp
    scheme: http
  selector:
    matchLabels:
      app: metrics-app