update prometheus charts from prometheus-operator to kube-prometheus-stack

Question

Recently prometheus-operator chart is deprecated and the chart has been renamed kube-prometheus-stack to more clearly reflect that it installs the kube-prometheus project stack, within which Prometheus Operator is only one component.

I checked both old and new chart and also I read all related documentation, but I couldn't find changes in the files(especially in values.yaml), could someone explain me to migrate from prometheus-operator to kube-prometheus-stack what I should do exactly?

Answer 1

March 18, 2021.

I migrated from prometheus-operator to kube-prometheus-stack and faced some difficulties.

Below is a list of errors which I encountered and the steps I took to work-around this.

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Error 1: unknown field "metricRelabelings".

Solution: Comment out all appearances.

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Error 2: unknown field "relabelings".

Solution: Comment out all appearances.

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Error 3: unknown field "selector" in com.coreos.monitoring.v1.Alertmanager.spec.storage.volumeClaimTemplate.

Solution: Comment out all this specific field under the volumeClaimTemplate.

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Error 4: unknown field "shards" in com.coreos.monitoring.v1.Prometheus.spec.

Solution: Comment out the specific location, or follow suggestions from here.

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Error 5: prometheus-kube-stack unknown fields probenamespaceselector and probeSelector.

Solution: As mentioned in here, Delete all CRDs:

kubectl delete crd prometheuses.monitoring.coreos.com
kubectl delete crd prometheusrules.monitoring.coreos.com
kubectl delete crd servicemonitors.monitoring.coreos.com
kubectl delete crd podmonitors.monitoring.coreos.com
kubectl delete crd alertmanagers.monitoring.coreos.com
kubectl delete crd thanosrulers.monitoring.coreos.com

And ran helm install again.

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Link to the chart issues page in Github.