Core Resources

This guide describes the core resource types in IronCore and how to use them to manage and limit resource usage.

ResourceQuota

A ResourceQuota in IronCore provides a mechanism to manage and limit the usage of resources across multiple requesting entities. This allows protecting the system from usage spikes and services can be kept responsive. With the help of ResourceQuota, you can set a hard limit with a list of resources and a ScopeSelector for a Namespace, restricting the amount of resources a user can create.

TIP

ResourceQuota is a namespaced resource, and it can only limit resource count/accumulated resource usage within a defined namespace.

Example ResourceQuota Resource

An example of how to define a ResourceQuota in IronCore:

apiVersion: core.ironcore.dev/v1alpha1
kind: ResourceQuota
metadata:
  name: resource-quota-sample
spec:
  hard: # Hard is the mapping of strictly enforced resource limits.
    requests.cpu: "10"
    requests.memory: 100Gi
    requests.storage: 10Ti

Key Fields:

• hard (ResourceList): Is a ResourceList of the strictly enforced number of resources. ResourceList is a list of ResourceName alongside their resource quantity.
• scopeSelector (ResourceScopeSelector): scopeSelector selects the resources that are subject to this quota.

TIP

By using scopeSelectors, only certain resources like CPU and memory may be tracked.