metrics-server
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kubernetes-sigs
Minimize RBAC permissions
Merge changes by @serathius for #851 into helm chart's clusterrole.yaml
What this PR does / why we need it: Minimize the RBAC permissions of the system:metrics-server clusterrole when installing with the provided helm chart.
Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Completes #851
The committers listed above are authorized under a signed CLA.
- :white_check_mark: login: CrisNevares (07d1d48b872bdff2e67c330ad6ff109702c952d8)
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Hi @CrisNevares. Thanks for your PR.
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Hmm, I think removing configmap permission might break deploying MS in different namespaces. Can't find the issue that was reported, but I remember some strange case where depending whether MS is deployed in kube-system vs any other namespaces it required different RBAC.
/hold Unitl we have confirmation.
Hmm, I think removing
configmappermission might break deploying MS in different namespaces. Can't find the issue that was reported, but I remember some strange case where depending whether MS is deployed inkube-systemvs any other namespaces it required different RBAC./hold Unitl we have confirmation.
hmm @serathius Is PR #1019 the issue you're thinking of?
While I would agree that minimizing permissions is a good idea in general, I actually don't see any big reason to remove "configmap" completely. If metrics-server is installed in kube-system it already has much more permissions, for example querying every configmap in the kube-system namespace. For me it is much worse.
I would say leave "configmap" permission and lock it down to the needed configs, like "extension-apiserver-authentication::client-ca-file" retrieval.
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