1

How many labels on node node01?

kubectl describe node node01

2

What is the value set to the label key beta.kubernetes.io/arch on node01?

kubectl describe node node01 | grep beta.kubernetes.io/arch

3

Apply a label color=blue to node node01.

kubectl label node node01 color=blue

node/node01 labeled

4

Create a new deployment named blue with the nginx image and 3 replicas.

kubectl create deployment blue --image=nginx --replicas=3

deployment.apps/blue created

5

Which nodes can the pods for the blue deployment be placed on?

Make sure to check taints on both nodes!

kubectl describe node node01 | grep Taints
kubectl describe node controlplane | grep Taints

6

Set Node Affinity to the deployment to place the pods on node01 only.

kubectl edit deployment blue

# then, edit yaml file. if you command ':wq', eployment.apps/blue edited.
apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: blue
  name: blue
  namespace: default
spec:
  template:
    metadata:
      creationTimestamp: null
      labels:
        app: blue
    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: color
                operator: In
                values:
                - blue
      containers:
      - image: nginx
        imagePullPolicy: Always
        name: nginx
        resources: {}
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30

7

which nodes are the pods placed on?

node01

8

Create a new deployment named red with the nginx image and 2 replicas, and ensure it gets placed on the controlplane node only.

Use the label key - node-role.kubernetes.io/control-plane - which is already set on the controlplane node.