Kubernetes LimitRange

Definition:

Constraints on resource limits and requests:

• The administrator creates a LimitRange in a Kubernetes Namespace
• if objects (such as pod or PersistentVolumeClaims) do not set resource req, the default LimitRange is applied
• LimitRange tracks usage to ensure that objects donot exceed resource miimum, maximum and ratio
• if creating an object that is outside of limitrange, api server will return 403

LimitRange and admission checks for Pods

---

API

• apiVersion: v1
• kind: LimitRange
• metadata
• spec: LimitRangeSpec

LimitRangeSpec

• limits:
  • type:
  • default: map[string]Quantity
  • defaultRequest
  • max
  • maxLimitRequestRatio
  • min

LimitRangeList

• apiVersion: v1
• kind: LimitRangeList
• metadata
• items: []LimitRangeSpec