AWS CloudFormation | Former2 で既存リソースを CloudFormation テンプレート化しよう

$ git clone https://github.com/iann0036/former2.git
Cloning into 'former2'...
remote: Enumerating objects: 12277, done.
remote: Counting objects: 100% (1688/1688), done.
remote: Compressing objects: 100% (450/450), done.
remote: Total 12277 (delta 1297), reused 1443 (delta 1231), pack-reused 10589
Receiving objects: 100% (12277/12277), 64.55 MiB | 4.94 MiB/s, done.
Resolving deltas: 100% (5798/5798), done.

$ cd former2
$ vi docker-compose.yml

version: '3'
  2 services:
  3   former2:
  4     image: nginx:stable-alpine
  5     ports:
  6       - "127.0.0.1:8080:80"
  7     volumes:
  8     - .:/usr/share/nginx/html
  9

$ docker-compose up -d
Creating network "former2_default" with the default driver
Pulling former2 (nginx:stable-alpine)...
stable-alpine: Pulling from library/nginx
9b18e9b68314: Pull complete
e78d13e7546a: Pull complete
404fe4e73af4: Pull complete
341b0b8c46a1: Pull complete
d642a3b33566: Pull complete
e80328dec171: Pull complete
Digest: sha256:d24e098389beed466ea300d5473cdda939bf6e91a93873d0fd1dd18e138c2f13
Status: Downloaded newer image for nginx:stable-alpine
Creating former2_former2_1 ... done

[cloudshell-user@ip-10-0-95-51 ~]$ aws sts assume-role --role-arn arn:aws:iam::【アカウントID】:role/【作成したロール名】 --role-session-name "【お好きなセッション名】"
{
    "Credentials": {
        "AccessKeyId": "xxxxxxxxxxxxxxxxxxxxx",
        "SecretAccessKey": "xxxxxxxxxxxxxxxxxxxxx",
        "SessionToken": "xxxxxxxxxxxxxxxxxxxxx",
        "Expiration": "yyyy-MM-ddThh:mm:ss+00:00"
    },
    "AssumedRoleUser": {
        "AssumedRoleId": "xxxxxxxxxxxxxxxxxxxxx:SessionForFormer2",
        "Arn": "arn:aws:sts::【アカウントID】:assumed-role/【作成したロール名】/【お好きなセッション名】"
    }
}

AWSTemplateFormatVersion: "2010-09-09"
Metadata:
    Generator: "former2"
Description: ""
Resources:
    EC2VPC:
        Type: "AWS::EC2::VPC"
        Properties:
            CidrBlock: "10.0.0.0/16"
            EnableDnsSupport: true
            EnableDnsHostnames: true
            InstanceTenancy: "default"
            Tags: 
              - 
                Key: "Name"
                Value: "vpc_cloud_link"

    EC2Subnet:
        Type: "AWS::EC2::Subnet"
        Properties:
            AvailabilityZone: !Sub "${AWS::Region}a"
            CidrBlock: "10.0.0.0/24"
            VpcId: !Ref EC2VPC
            MapPublicIpOnLaunch: false
            Tags: 
              - 
                Key: "Name"
                Value: "subnet_cloud_link"

    EC2RouteTable:
        Type: "AWS::EC2::RouteTable"
        Properties:
            VpcId: !Ref EC2VPC
            Tags: 
              - 
                Key: "Name"
                Value: "cloud_link_rtb"

    EC2SubnetRouteTableAssociation:
        Type: "AWS::EC2::SubnetRouteTableAssociation"
        Properties:
            RouteTableId: !Ref EC2RouteTable
            SubnetId: !Ref EC2Subnet

$ rain deploy former2_vpc.yml
CloudFormation will make the following changes:
Stack former2-vpc:
  + AWS::EC2::RouteTable EC2RouteTable
  + AWS::EC2::SubnetRouteTableAssociation EC2SubnetRouteTableAssociation
  + AWS::EC2::Subnet EC2Subnet
  + AWS::EC2::VPC EC2VPC
Do you wish to continue? (Y/n)
Deploying template 'former2_vpc.yml' as stack 'former2-vpc' in ap-northeast-1.
Stack former2-vpc: CREATE_COMPLETE
Successfully deployed former2-vpc