Table of Contents

1. Challenge

   Enable and Disable Admission Controllers

   • Use a text editor to modify the kube-apiserver.yaml file.
     • Enable the ResourceQuota admission controller.
     • Disable the MutatingAdmissionWebhook admission controller.
   • Validate that the kube-apiserver pod redeploys successfully by issuing a simple kubectl command (the pod can take several seconds to redeploy).
2. Challenge

   Create and Edit Admission Controller Resources

   • Use the kubectl command to edit the LimitRange object in the dev namespace.
     • Update the default CPU limit to be 500m and the memory limit to be 512Mi.
     • Update the default CPU request to be 250m and the memory request to be 128Mi.
   • Create and deploy a ResourceQuota object to the test namespace using the following steps:

     • Create a manifest file called test-quota.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: ResourceQuota
   metadata:
     name: test-quota
     namespace: test
   spec:
     hard:
       requests.memory: 128Mi
       requests.cpu: 250m
       limits.memory: 512Mi
       limits.cpu: "1"
   

   • Use kubectl to deploy the manifest file.
3. Challenge

   Deploy Pods to the Cluster

   • 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 requests and limits for memory and CPU).
   • Edit the nginx-pod.yaml file and change the namespace to test and attempt to deploy the pod (take note of any output you receive).
   • Edit the nginx-pod.yaml file and redeploy it to the test namespace.
     • Under the containers section, add a section for resources.
     • Under resources, add a section for limits and set memory to 256Mi and cpu to 500m.
     • Under resources, add a section for requests and set memory to 64Mi and cpu to 125m.
     • Use the kubectl command to deploy the nginx-pod.yaml (take note of any output).
     • Use the kubectl command to print information about the pod in YAML format (view the requests and limits).