How to add SSH public key to EKS Worker Node after cluster is created

eks_node_add_public_key.yaml

# This DaemonSet basically adds your id_rsa.pub to the authorized_keys on the EKS Worker Node EC2.
# Just save this as a yaml file, replace your public key below and run
#     $ kubectl apply -f eks_node_add_public_key.yaml
# Check all the pods are running and as soon as they are running, you can remove the set:
#     $ kubectl delete -f eks_node_add_public_key.yaml
#
apiVersion: apps/v1
kind: DaemonSet
metadata:
  labels:
    k8s-app: ec2-public-key
  name: ec2-public-key
  namespace: default
spec:
  selector:
    matchLabels:
      k8s-app: ec2-public-key
  template:
    metadata:
      labels:
        k8s-app: ec2-public-key
    spec:
      containers:
      - image: amazonlinux
        imagePullPolicy: Always
        name: ec2pubkey
        command: ["/bin/bash"]
        args: ["-c","echo 'ssh-rsa <YOUR_ID_RSA_PUB_KEY> [email protected]' >> /etc/ec2home/.ssh/authorized_keys && chown -R 1000:1000 /etc/ec2home/.ssh && chmod 600  /etc/ec2home/.ssh/authorized_keys && sleep 5000"]
        securityContext:
          allowPrivilegeEscalation: true
        volumeMounts:
        - mountPath: /etc/ec2home
          name: ec2home    
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
      volumes:
      - name: ec2home
        hostPath:
          path: /home/ec2-user
          type: Directory  
      dnsPolicy: ClusterFirst
      restartPolicy: Always
      schedulerName: default-scheduler
      terminationGracePeriodSeconds: 30