helm repo add eks <https://aws.github.io/eks-charts>
helm repo update eks
helm install aws-load-balancer-controller eks/aws-load-balancer-controller \\
  -n kube-system \\
  --set clusterName=gwangju-eks-cluster \\
  --set serviceAccount.create=false \\
  --set serviceAccount.name=aws-load-balancer-controller

#!/bin/bash
public_a=$(aws ec2 describe-subnets --filters "Name=tag:Name,Values=gwangju-public-a" --query "Subnets[].SubnetId[]" --output text)
public_b=$(aws ec2 describe-subnets --filters "Name=tag:Name,Values=gwangju-public-b" --query "Subnets[].SubnetId[]" --output text)
private_a=$(aws ec2 describe-subnets --filters "Name=tag:Name,Values=gwangju-private-a" --query "Subnets[].SubnetId[]" --output text)
private_b=$(aws ec2 describe-subnets --filters "Name=tag:Name,Values=gwangju-private-b" --query "Subnets[].SubnetId[]" --output text)

public_subnet_name=("$public_a" "$public_b")
private_subnet_name=("$private_a" "$private_b")

for name in "${public_subnet_name[@]}"
do
    aws ec2 create-tags --resources $name --tags Key=kubernetes.io/role/elb,Value=1
done

for name in "${private_subnet_name[@]}"
do
    aws ec2 create-tags --resources $name --tags Key=kubernetes.io/role/internal-elb,Value=1
done