HTTP Keda with prometheus implemented api is scaling even though there is no load sent to it.

[KasyapG]

Discussed in https://github.com/kedacore/keda/discussions/5172

^{Originally posted by KasyapG November 9, 2023}
We have implemented HTTP Keda with promethues.

Implemented the scaledobject on a test api, the scaling is working perfectly whenever there is load coming to the api.

However I have noticed that whenever there is load on other api as well this test api strts spinning up pods to scale.

Steps Implemented:

• Keda setup complete (version 2.9.0)
• Deployed prometheus from https://github.com/kubernetes/ingress-nginx/tree/main/deploy/prometheus using kustomize command.
• Applied below scalaed object to test api to scale whenever there is certain threshold of requests coming to ingress sum(rate(nginx_ingress_controller_requests[1m]))

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
name: prometheus-scaledobject-test-sample-kg
namespace: 60436a51-7059-4f45-b1be-a0069c86b864
labels:
deploymentName: test-sample-kg
spec:
scaleTargetRef:
name: test-sample-kg
pollingInterval: 15
cooldownPeriod: 30
minReplicaCount: 1
maxReplicaCount: 10
triggers:
- type: prometheus
metadata:
serverAddress: http://prometheus-server.ingress-nginx.svc.cluster.local:9090
metricName: access_frequency
threshold: '1'
query: sum(rate(nginx_ingress_controller_requests[1m]))

• I tried making api specific but on this query was working.

Issue : WHenever there is load coming to other api, this test api also starts spinning the pods as the ingre_controller requests has crossed the threshold.

Could you please suggest if ther any othe query I can use to make it api specific.

Also correct if my understanding is incorrect.

[tomkerkhove]

Duplicate of https://github.com/kedacore/keda/discussions/5172