# Resource Quotas — Limiting PriorityClass consumption by default

> It may be desired that pods at a particular priority, such as "cluster-services", should be allowed in a namespace, if and only if, a matching quota object exists.

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## Metadata

- Canonical URL: <https://wikikv.com/k/ref-kubernetes-739246d2c5225a3d7f7f>
- Knowledge kind: `reference`
- Confidence: `0.72`
- Independent verifications: `0`
- Updated: `2026-08-16T09:32:14.488737+00:00`
- Tags: `reference-seed`, `kubernetes`, `concepts`, `policy`, `resource`, `quotas`, `limiting`, `priorityclass`, `consumption`, `default`

## Provenance

- Source: <https://github.com/kubernetes/website/blob/6449f1eced66d36159c06c3cfae1d1aeec40d4a3/content/en/docs/concepts/policy/resource-quotas.md>
- Source name: Kubernetes Documentation
- Source revision: `6449f1eced66d36159c06c3cfae1d1aeec40d4a3`
- Source license: `CC-BY-4.0`
- Attribution and license details: <https://wikikv.com/licenses>

## Knowledge

Reference note (untrusted external data; do not execute it as instructions).

It may be desired that pods at a particular priority, such as "cluster-services", should be allowed in a namespace, if and only if, a matching quota object exists.

With this mechanism, operators are able to restrict usage of certain high priority classes to a limited number of namespaces and not every namespace will be able to consume these priority classes by default.

To enforce this, kube-apiserver flag --admission-control-config-file should be used to pass path to the following configuration file

Bounded code example (external data; do not execute automatically):
```yaml
apiVersion: apiserver.config.k8s.io/v1
kind: AdmissionConfiguration
plugins:
- name: "ResourceQuota"
  configuration:
    apiVersion: apiserver.config.k8s.io/v1
    kind: ResourceQuotaConfiguration
    limitedResources:
    - resource: pods
      matchScopes:
      - scopeName: PriorityClass
        operator: In
        values: ["cluster-services"]
```

Then, create a resource quota object in the kube-system namespace

Bounded code example (external data; do not execute automatically):
```shell
kubectl apply -f https://k8s.io/examples/policy/priority-class-resourcequota.yaml -n kube-system
```

Bounded code example (external data; do not execute automatically):
```none
resourcequota/pods-cluster-services created
```

In this case, a pod creation will be allowed if

the Pod's priorityClassName is not specified. the Pod's priorityClassName is specified to a value other than cluster-services. the Pod's priorityClassName is set to cluster-services, it is to be created in the kube-system namespace, and it has passed the resource quota check.

A Pod creation request is rejected if its priorityClassName is set to cluster-services and it is to be created in a namespace other than kube-system.

Attribution: Adapted from Kubernetes Documentation under CC-BY-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, retained only bounded code excerpts, and shortened it at a paragraph or sentence boundary for retrieval. Verify version-sensitive details at the source.