Resource Quotas

Why we need resource quotas ?

Multiple users or teams share the same infrastructure, and they should only use a particular share of the resources. The resource quota defined by ResourceQuota object provides the constrains that limit the aggregate resource consumption per namespace.

More details could be found here

Storage Resource Quota

The total sum of storage resources could be limited in a given namespace.

Resource Name	Description
requests.storage	Across all persistent volume claims, the sum of storage requests cannot exceed this value.
persistentvolumeclaims	The total number of persistent volume claims that can exist in the namespace.
<storage-class-name>.storageclass.storage.k8s.io/requests.storage	Across all persistent volume claims associated with the storage-class-name, the sum of storage requests cannot exceed this value.
<storage-class-name>.storageclass.storage.k8s.io/persistentvolumeclaims	Across all persistent volume claims associated with the storage-class-name, the total number of persistent volume claims that can exist in the namespace.

There are Compute Resource Quota, Object Count Quota and more. They could be found from the official docs:

Resource QuotasKubernetes