{{- if .Values.canary.enabled }}
apiVersion: flagger.app/v1beta1
kind: Canary
metadata:
  name: {{ template "fullname" . }}
  labels:
    draft: {{ default "draft-app" .Values.draft }}
    chart: "{{ .Chart.Name }}-{{ .Chart.Version | replace "+" "_" }}"
spec:
  provider: istio
  targetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: {{ template "fullname" . }}
  progressDeadlineSeconds: {{ .Values.canary.progressDeadlineSeconds }}
  {{- if .Values.hpa.enabled }}
  autoscalerRef:
    apiVersion: autoscaling/v2beta1
    kind: HorizontalPodAutoscaler
    name: {{ template "fullname" . }}
  {{- end }}
  service:
    port: {{ .Values.service.externalPort }}
    targetPort: {{ .Values.service.internalPort }}
    gateways:
    - {{ template "fullname" . }}
    hosts:
    - {{ .Values.canary.host }}
  analysis:
    interval: {{ .Values.canary.canaryAnalysis.interval }}
    threshold: {{ .Values.canary.canaryAnalysis.threshold }}
    maxWeight: {{ .Values.canary.canaryAnalysis.maxWeight }}
    stepWeight: {{ .Values.canary.canaryAnalysis.stepWeight }}
    metrics:
    - name: request-success-rate
      threshold: {{ .Values.canary.canaryAnalysis.metrics.requestSuccessRate.threshold }}
      interval: {{ .Values.canary.canaryAnalysis.metrics.requestSuccessRate.interval }}
    - name: latency
      templateRef:
        name: latency
      thresholdRange:
        max: {{ .Values.canary.canaryAnalysis.metrics.requestDuration.threshold }}
      interval: {{ .Values.canary.canaryAnalysis.metrics.requestDuration.interval }}

---

apiVersion: flagger.app/v1beta1
kind: MetricTemplate
metadata:
  name: latency
spec:
  provider:
    type: prometheus
    address: http://prometheus.istio-system:9090
  query: |
    histogram_quantile(
        0.99,
        sum(
            rate(
                istio_request_duration_milliseconds_bucket{
                    reporter="destination",
                    destination_workload_namespace="{{ "{{" }} namespace {{ "}}" }}",
                    destination_workload=~"{{ "{{" }} target {{ "}}" }}"
                }[{{ "{{" }} interval {{ "}}" }}]
            )
        ) by (le)
    )

---

apiVersion: networking.istio.io/v1alpha3
kind: Gateway
metadata:
  name: {{ template "fullname" . }}
spec:
  selector:
    istio: ingressgateway
  servers:
  - port:
      number: {{ .Values.service.externalPort }}
      name: http
      protocol: HTTP
    hosts:
    - {{ .Values.canary.host }}
{{- end }}