Let’s cleanup this tutorial

kubectl delete deployments --all
kubectl delete service  nginx

Edit aws-node configmap and comment AWS_VPC_K8S_CNI_CUSTOM_NETWORK_CFG and its value

kubectl edit daemonset -n kube-system aws-node
      - env:
        #  value: "true"
        - name: AWS_VPC_K8S_CNI_LOGLEVEL
          value: DEBUG
        - name: MY_NODE_NAME

Delete custom resource objects from ENIConfig CRD. Replace yaml filenames based on your region and AZs.

cd $HOME/environment
kubectl delete -f eniconfig

rm -rf pod-netconfig.template eniconfig

Terminate EC2 instances so that fresh instances are launched with default CNI configuration

Use caution before you run the next command because it terminates all worker nodes including running pods in your workshop

INSTANCE_IDS=(`aws ec2 describe-instances --query 'Reservations[*].Instances[*].InstanceId' --filters "Name=tag-key,Values=eks:cluster-name" "Name=tag-value,Values=eksworkshop*" --output text` )
for i in "${INSTANCE_IDS[@]}"
	echo "Terminating EC2 instance $i ..."
	aws ec2 terminate-instances --instance-ids $i

Wait for instance termination. Delete secondary CIDR from your VPC

VPC_ID=$(aws ec2 describe-vpcs --filters Name=tag:Name,Values=eksctl-eksworkshop* | jq -r '.Vpcs[].VpcId')
ASSOCIATION_ID=$(aws ec2 describe-vpcs --vpc-id $VPC_ID | jq -r '.Vpcs[].CidrBlockAssociationSet[] | select(.CidrBlock == "") | .AssociationId')
aws ec2 delete-subnet --subnet-id $CGNAT_SNET1
aws ec2 delete-subnet --subnet-id $CGNAT_SNET2
aws ec2 delete-subnet --subnet-id $CGNAT_SNET3
aws ec2 disassociate-vpc-cidr-block --association-id $ASSOCIATION_ID