03-Practice-Test-Manual-Scheduling.md

Practice Test - Manual Scheduling

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Solutions to Practice Test - Manual Scheduling

1. A pod definition file nginx.yaml is given. Create a pod using the file.

   kubectl create -f nginx.yaml
   

2. What is the status of the created POD?

   kubectl get pods
   

   Examine the STATUS column

3. Why is the POD in a pending state?
   Inspect the environment for various kubernetes control plane components.

   kubectl get pods --namespace kube-system
   

   There is a key pod missing here!

4. Manually schedule the pod on node01.

   We will have to delete and recereate the pod, as the only property that may be edited on a running container is image

   vi nginx.yaml
   

   Make the following edit

   ---
   apiVersion: v1
   kind: Pod
   metadata:
     name: nginx
   spec:
     nodeName: node01    # add this line
     containers:
     -  image: nginx
        name: nginx

   kubectl delete -f nginx.yaml
   kubectl create -f nginx.yaml
   

5. Now schedule the same pod on the controlplane node.

   Repeat the steps as per the previous question. Edit nodeName to be controlplane