[kube-prometheus-stack] How to change Prometheus default port (9090)

[nessrinehaf]

Hello,

I've been trying to change my port to 9091 since 9090 is used but i get container with 2 ports:

what i did:
add to values:
containers:
- name: prometheus
ports:
- name: http-web
containerPort: 9091
protocol: TCP

or update the helm chart: --set prometheus.service.port=9091
--set prometheus.prometheusSpec.containers[0].name=prometheus
--set prometheus.prometheusSpec.containers[0].ports[0].containerPort=9091
--set prometheus.prometheusSpec.containers[0].ports[0].name=http-web
--set prometheus.prometheusSpec.containers[0].ports[0].protocol=TCP

Still same. Can you please give me a tip to change it?

[zeritti]

I doubt changing the port is currently possible and I am sure Prometheus operator sets and expects exactly that number. Other than that, a strategic merge patch, supported by the operator, follows the field's patch strategy:

With a strategic merge patch, a list is either replaced or merged depending on its patch strategy. The patch strategy is specified by the value of the patchStrategy key in a field tag in the Kubernetes source code.

ContainerPort has the patch strategy merge on patch merge key containerPort. This is why you see another element in the list.