UserData:
        Fn::Base64:
          !Sub |
            #!/bin/bash
            hostnamectl --static set-hostname eksctl-host

            # Install tools
            yum -y install git tree tmux jq lynx htop

            # Install aws cli v2
            curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
            unzip awscliv2.zip
            sudo ./aws/install
            export PATH=/usr/local/bin:$PATH
            source ~/.bash_profile
            complete -C '/usr/local/bin/aws_completer' aws

            # Install eksctl
            curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
            mv /tmp/eksctl /usr/local/bin

            # Install kubectl v1.21.2
            curl -LO https://dl.k8s.io/release/v1.21.2/bin/linux/amd64/kubectl
            install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl

            # Install postgresql11
            amazon-linux-extras install -y postgresql11

            # Install the full Amazon Corretto 11
            yum install java-11-amazon-corretto -y

            # Install Docker
            amazon-linux-extras install docker -y
            systemctl start docker && systemctl enable docker

            # Install nodejs
            yum install -y gcc-c++ make
            curl -sL https://rpm.nodesource.com/setup_14.x | sudo -E bash -
            yum install -y nodejs

            # Source bash-completion for kubectl
            source <(kubectl completion bash)
            echo 'source <(kubectl completion bash)' >>~/.bashrc 
            echo 'alias k=kubectl' >> ~/.bashrc
            echo 'complete -F __start_kubectl k' >>~/.bashrc

            # Install kubens kubectx
            git clone https://github.com/ahmetb/kubectx /opt/kubectx
            ln -s /opt/kubectx/kubens /usr/local/bin/kubens
            ln -s /opt/kubectx/kubectx /usr/local/bin/kubectx

            # Config convenience
            echo 'alias vi=vim' >> /etc/profile
            echo "sudo su -" >> /home/ec2-user/.bashrc

            # Change localtime
            sed -i "s/UTC/Asia\/Seoul/g" /etc/sysconfig/clock
            ln -sf /usr/share/zoneinfo/Asia/Seoul /etc/localtime