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
         OR
   kubectl replace -f nginx.yaml --force (one single cmd will delete and create)
   

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

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