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Kubernetes ResourceQuota and LimitRange

ResourceQuota and LimitRange are mechanisms used to manage and constrain compute resources within a Kubernetes cluster, often applied at the Namespace level to ensure fair distribution and stability^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md].

Namespace Context

Kubernetes supports multiple virtual clusters (Namespaces) backed by the same physical cluster^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md]. Namespaces are ideal for scenarios involving multiple teams or projects, allowing for resource isolation where necessary^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md]. A key characteristic of Namespaces is that deleting one also deletes all resources contained within it^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md].

Resource Allocation Concepts

Within these isolated environments, the following policies can be applied to control usage:

  • ResourceQuota: Used to assign strict quotas or limits on system resources (such as CPU and memory) for a specific Namespace^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md].
  • LimitRange: Used to define default resource requests and limits for pods or containers, ensuring consistent consumption behaviors^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md].

Together, these tools allow administrators to prevent any single namespace or workload from consuming excessive cluster resources, protecting the overall system health^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md].

Sources

^[400-devops-06-kubernetes-k8s-ithelp-day22-readme.md]