Configuring and Implementing Kubernetes Admission Controllers

• Use a text editor to modify the kube-apiserver.yaml and ensure that the LimitRanger admission controller is enabled.
• Validate that the kube-apiserver pod redeploys successfully by issuing a simple kubectl command (the pod can take several seconds to redeploy).

• Create a manifest file called mem-limit.yaml with the following specifications:

  Note: performing a copy paste directly from the objective will result in additional spaces being added. To remove additional spaces, either copy to a text editor on your computer before copying to the file on the host or manually remove the spaces once you have copied the file.

apiVersion: v1
kind: LimitRange
metadata:
  name: mem-limit-range
  namespace: dev
spec:
  limits:
  - default:
      memory: 512Mi
    defaultRequest:
      memory: 256Mi
    type: Container

• Use the kubectl command to deploy the manifest file.

• View the contents of the nginx-pod.yaml file in the /home/cloud_user directory (take note of any memory requests or limits, if they appear):
  • Use the kubectl command to deploy the manifest.
  • Use the kubectl command to print information about the pod in YAML format (pay attention to the memory request and limit).
• View the contents of the test-pod.yaml file in the /home/cloud_user directory (take note of any memory requests or limits, if they appear):
  • Use the kubectl command to deploy the manifest.
  • Use the kubectl command to print information about the pod in YAML format (pay attention to the memory request and limit).