# 수업 준비

1. 해당 [문서](https://docs.aws.amazon.com/cloud9/latest/user-guide/create-environment-main.html)를 참고해서 Cloud9 환경 생성 - 
   1. 플랫폼: **Amazon Linux 2023**
   2. 인스턴스 타입: **m5.large**
2. Cloud9 인스턴스로 접속한 다음 Terraform이 설치되어 있는지 확인

   ```
   terraform --version
   ```
3. Terraform이 설치되어 있지 않을 경우 아래의 명령어를 실행해서 Terraform 설치

   ```
   {
       sudo yum install -y yum-utils
       sudo yum-config-manager --add-repo https://rpm.releases.hashicorp.com/AmazonLinux/hashicorp.repo
       sudo yum -y install terraform
   }
   ```
4. Terraform 설치 확인 

   ```
   terraform --version
   ```
5. Cloud9에 설정된 AWS 임시 자격증명 비활성화

   ```
   {
       export TOKEN=$(curl -sX PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600")
       export INSTANCE_ID=$(curl -sH "X-aws-ec2-metadata-token: $TOKEN" "http://169.254.169.254/latest/meta-data/instance-id")
       export CLOUD9_ENVIRONMENT_ID=$(aws ec2 describe-tags \
       --filters "Name=resource-id,Values=$INSTANCE_ID" \
       --query "Tags[?Key=='aws:cloud9:environment'].Value" \
       --output text)
       aws cloud9 update-environment --environment-id $CLOUD9_ENVIRONMENT_ID --managed-credentials-action DISABLE
   }
   ```
6. AWS API를 호출하는 AWS 자격증명 확인

   ```
   aws sts get-caller-identity
   ```
7. Default VPC가 없을 경우에는 실습이 동작하지 않으니 VPC 콘솔에서 Default VPC를 생성


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