# The real error-rate gate, replacing the vector(0.0) harness in
# scripts/k3d/analysis-harness/.
#
# Runs before promotion. Every sample has to pass; one failure aborts and the
# active Service never moves.
apiVersion: argoproj.io/v1alpha1
kind: AnalysisTemplate
metadata:
  name: nereus-api-error-rate
  labels:
    app.kubernetes.io/name: nereus-api
    app.kubernetes.io/part-of: nereus
spec:
  args:
    - name: service
  metrics:
    - name: error-rate
      # Let the new pods take traffic first.
      initialDelay: 30s
      interval: 20s
      count: 5
      failureLimit: 0
      # Empty result means no traffic yet -- not a failure.
      successCondition: "len(result) == 0 || result[0] < 0.05"
      provider:
        prometheus:
          address: http://kube-prometheus-stack-prometheus.observability.svc.cluster.local:9090
          # 5xx as a fraction of all responses on the preview.
          # `or vector(0)` keeps the division defined when there are no errors.
          query: |
            (
              sum(rate(nereus_http_requests_total{service="{{args.service}}",status=~"5.."}[1m]))
              or vector(0)
            )
            /
            sum(rate(nereus_http_requests_total{service="{{args.service}}"}[1m]))