Keda Metrics Server prometheus metrics port doesn't work

[northys]

After the upgrade to keda version which introduced third pod (there used to be only 2 pods IIRC) we started having issues with scrapping metrics from keda metrics server although we have enabled it using following config.

prometheus:
  metricServer:
    enabled: true
    serviceMonitor:
      enabled: true

Expected Behavior

Connection to metrics server service at port 8080 (or specified) returns metrics at path /metrics.

Actual Behavior

Connection to metrics-server:8080 results in connection refused.

Steps to Reproduce the Problem

1. deploy keda with provided config
2. HTTP GET for metrics server service at port 8080 results in following error in prometheus Get "http://192.168.73.158:8080/metrics": dial tcp 192.168.73.158:8080: connect: connection refused
3. webhooks and operator monitoring endpoint works just fine, only metrics is broken

Specifications

• KEDA Version: 2.11.0
• Platform & Version:
• Kubernetes Version: EKS 1.27
• Scaler(s): -

[trampfox]

The issue you are describing sounds similar to the one we encountered after upgrading to the version 2.11.1 of the chart.

We were able to resolve the issue by upgrading to version 2.11.2: https://github.com/kedacore/keda/releases/tag/v2.11.2

[northys]

thank you!