KEDA does not scale to zero

[rafaelarcanjo]

Hi, I would like some help, KEDA is not scaling to zero. Where can I go wrong? Thanks.

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: hpa-apache
spec:
  selector:
    matchLabels:
      run: hpa-apache
      #  replicas: 0
  template:
    metadata:
      labels:
        run: hpa-apache
    spec:
      containers:
      - name: hpa-apache
        image: k8s.gcr.io/hpa-example
        ports:
        - containerPort: 80
        resources:
          limits:
            cpu: 500m
          requests:
            cpu: 200m
---
apiVersion: v1
kind: Service
metadata:
  name: hpa-apache
  labels:
    run: hpa-apache
spec:
  ports:
  - port: 80
  selector:
    run: hpa-apache
---
apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: hpa-apache
  namespace: default
spec:
  minReplicaCount: 0
  maxReplicaCount: 2
  cooldownPeriod: 5
  pollingInterval: 5

  scaleTargetRef:
    name: hpa-apache
  triggers:
  - type: cpu
    metadata:
      type: "Utilization"
      value: "10"

[tomkerkhove]

Scale to 0 is not supported for CPU as you can see in the docs:

https://keda.sh/docs/2.4/scalers/cpu/

[rafaelarcanjo]

Thanks for replying, I changed the metrics for Prometheus, now it scales to 0. But now replicas don't go out to 0, could you help me again?

apiVersion: keda.k8s.io/v1alpha1
kind: ScaledObject
metadata:
  name: prometheus-scaledobject
  namespace: default
  labels:
    deploymentName: go-prom-app
spec:
  scaleTargetRef:
    deploymentName: go-prom-app
  pollingInterval: 15
  cooldownPeriod:  30
  minReplicaCount: 0
  maxReplicaCount: 10
  triggers:
  - type: prometheus
    metadata:
      serverAddress: http://prometheus-service.default.svc.cluster.local:9090
      metricName: access_frequency
      threshold: '3'
      query: sum(rate(http_requests[2m]))

[tomkerkhove]

I think everything looks good so it must be related to your Promtheus data then, I presume?

[rafaelarcanjo]

I believe it's normal

Thanks.