# Mechanism test for the automated rollback, run before the real API exists.
#
# It proves the exact chain the project depends on: Argo Rollouts pauses a
# blue-green promotion, runs an AnalysisRun, that run queries Prometheus over
# the network, evaluates the result against a threshold, and aborts the rollout
# on failure. The only thing faked is the metric itself.
#
# Throwaway. deploy/rollouts/ holds the real thing.
---
apiVersion: v1
kind: Service
metadata: {name: probe-active, namespace: nereus}
spec:
  selector: {app: probe}
  ports: [{port: 80, targetPort: 8080}]
---
apiVersion: v1
kind: Service
metadata: {name: probe-preview, namespace: nereus}
spec:
  selector: {app: probe}
  ports: [{port: 80, targetPort: 8080}]
---
apiVersion: argoproj.io/v1alpha1
kind: AnalysisTemplate
metadata: {name: error-rate, namespace: nereus}
spec:
  metrics:
    - name: error-rate
      interval: 10s
      count: 3
      # Same shape as the real query will use: fail when the error ratio is
      # above the threshold. failureLimit 0 means one bad sample aborts.
      successCondition: "result[0] < 0.05"
      failureLimit: 0
      provider:
        prometheus:
          address: http://kube-prometheus-stack-prometheus.observability.svc.cluster.local:9090
          query: "{{args.query}}"
  args:
    - name: query
---
apiVersion: argoproj.io/v1alpha1
kind: Rollout
metadata: {name: probe, namespace: nereus}
spec:
  replicas: 1
  revisionHistoryLimit: 2
  selector:
    matchLabels: {app: probe}
  template:
    metadata:
      labels: {app: probe}
    spec:
      containers:
        - name: web
          image: nginxinc/nginx-unprivileged:alpine
          ports: [{containerPort: 8080}]
          resources:
            requests: {cpu: 10m, memory: 16Mi}
  strategy:
    blueGreen:
      activeService: probe-active
      previewService: probe-preview
      autoPromotionEnabled: true
      prePromotionAnalysis:
        templates:
          - templateName: error-rate
        args:
          - name: query
            value: "vector(0.0)"