Can LimitRange set default values?

Yes, LimitRange can set default values for resource requests and limits in Kubernetes. When a LimitRange is defined in a namespace, it can specify default values for CPU and memory resources. If a pod is created without explicitly defining resource requests or limits, Kubernetes will automatically apply these default values from the LimitRange.

Here’s an example of how to define a LimitRange with default values:

apiVersion: v1
kind: LimitRange
metadata:
  name: example-limit-range
  namespace: example-namespace
spec:
  limits:
  - default:
      cpu: "500m"
      memory: "256Mi"
    defaultRequest:
      cpu: "250m"
      memory: "128Mi"
    type: Container

In this example:

• The default field specifies the default limits for CPU and memory.
• The defaultRequest field specifies the default requests for CPU and memory.

When a pod is created in the example-namespace without resource specifications, it will automatically receive the defined default values for CPU and memory.