kube-state-metrics
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kubernetes
What is the correct readiness probe port?
Hi,
In https://github.com/kubernetes/kube-state-metrics/pull/858 @MIBc added readinessProbe on port 8080 within the example deployment manifest.
This was later changed in https://github.com/kubernetes/kube-state-metrics/pull/908 by @brancz to port 8081.
Within the official helm chart the port is still configured as 8080: https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-state-metrics/templates/deployment.yaml#L113-L118
Which port is the correct one for readiness probe and why?
Ideally, there should be a dedicated endpoint for the the readiness probe built into KSM. Since that's not there, I don't know if there is a right or wrong endpoint to use as a probe. It is up to you to decide when the pods are considered ready to serve traffic.
Thanks @fpetkovski.
In the end, everything is up for me to decide :) However, I believe there should be an official recommendation, and currently it isn't consistent between the deployment manifest and the helm chart.
I agree, we should at least document the options somewhere to avoid confusion.
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