slo_prom_metrics_availability_ratio.yaml

apiVersion: sre.google.com/v2
kind: ServiceLevelObjective
metadata:
  name: prom-metrics-availability
  labels:
    service_name: prom
    feature_name: metrics
    slo_name: availability
spec:
  description: 99.9% of Prometheus requests return a good HTTP code
  backend: prometheus
  method: good_bad_ratio
  exporters:
  - prometheus
  service_level_indicator:
    filter_good: prometheus_http_requests_total{handler="/metrics", code=~"2.."}
    filter_valid: prometheus_http_requests_total{handler="/metrics"}
    # filter_bad: prometheus_http_requests_total{code=~"5..", handler="/metrics"} # alternative to filter_valid field
  goal: 0.999