> For the complete documentation index, see [llms.txt](https://psedu.gitbook.io/cloudia/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://psedu.gitbook.io/cloudia/task-3-subnet.md).

# Task 3 Subnet 생성

Info

\-       Terraform VPC Subnet Example

\-       VPC CIDR 은 10.0.0.0/16

\-       Subnet CIDR 은 10.X.0.0/24

\-       Subnet 은 본인이 선택한 Region의 Availability Zone 수만큼 생성 (ex. us-east-1 -> 4 Availability Zones -> 4 Subnets)

\-       각 Availability Zone 별로 Public Subnet, Private Subnet 페어로 한개씩 존재하도록 생성

1\)    Subnet 실습을 진행하기 위해서 02-subnet 폴더로 경로 이동

\-       <mark style="color:blue;">cd ../02-subnet/</mark>

<figure><img src="/files/nOezd24z52l1xEp7VTzL" alt=""><figcaption></figcaption></figure>

2\)    업로드 된 폴더 02-subnet 하위 파일인subnet.tfvars 파일 실행

## &#x20;

3\)    subnet.tfvars 파일 확인 실행 환경에 맞게 변경

변수 설정

\- # subnet.tfvars 파일\
\
prefix              =       "user<mark style="background-color:red;">\*\*</mark>"\
region              =       "ap-northeast-2"\
vpc\_cidr            =       "10.<mark style="background-color:red;">\*\*</mark>.0.0/16"\
\
public\_subnets      =       \[\
&#x20;   {cidr = "10.<mark style="background-color:red;">\*\*</mark>.1.0/24", availability\_zone = "ap-northeast-2a"},\
&#x20;   {cidr = "10.<mark style="background-color:red;">\*\*</mark>.3.0/24", availability\_zone = "ap-northeast-2c"},\
&#x20;   ]\
\
private\_subnets = \[\
&#x20;   {cidr = "10.<mark style="background-color:red;">\*\*</mark>.11.0/24", availability\_zone = "ap-northeast-2a"},\
&#x20;   {cidr = "10.<mark style="background-color:red;">\*\*</mark>.13.0/24", availability\_zone = "ap-northeast-2c"},\
]\ <br>

\- Prefix는 알맞게 변경

\- Region 은 본인이 사용할 region 코드로 변경

\- Subnet의 Availability Zone 값은 Region에 맞게 변경

&#x20;

4\)    Init 명령으로 Terraform 수행을 위한 provider plugin 초기화 및 다운로드 수행

\- <mark style="color:blue;">terraform init</mark>

&#x20;

5\)    Plan 명령으로 Terraform 수행 전 실행 시뮬레이션 확인

\- <mark style="color:blue;">terraform plan --var-file=subnet.tfvars</mark>

&#x20;

6\)    Apply 명령으로 Terraform을 통한 Resource 생성 수행

\- <mark style="color:blue;">terraform apply --var-file=subnet.tfvars</mark>

&#x20;

7\)    선택한 Region에 VPC 및 Subnet 생성 내용 확인

&#x20;

8\)    Resource 삭제

\-       destroy

\-       Destroy 명령으로 생성된 VPC 삭제 수행

\-       <mark style="color:blue;">terraform destroy --var-file=subnet.tfvars</mark>

9\) 폴더 삭제

\-       Cloud9 왼쪽 메뉴에 02-subnet 폴더 우 클릭 후 Delete


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