root-stack.yaml

AWSTemplateFormatVersion: "2010-09-09"
Description: Root stack
Resources:
  sshKeyPair:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/key-pair/main.yaml
  devVpc:
    Type: AWS::CloudFormation::Stack
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/vpc/vpc.yaml
  internetGateway:
    Type: AWS::CloudFormation::Stack
    DependsOn:
      - devVpc
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/vpc/internet-gateway.yaml
      Parameters:
        vpcId:
          Fn::GetAtt:
            - devVpc
            - Outputs.vpcId
  routeTable:
    Type: AWS::CloudFormation::Stack
    DependsOn:
      - devVpc
      - internetGateway
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/vpc/route-table.yaml
      Parameters:
        vpcId:
          Fn::GetAtt:
            - devVpc
            - Outputs.vpcId
        internetGatewayId:
          Fn::GetAtt:
            - internetGateway
            - Outputs.internetGatewayId
  devPublicSubnet:
    Type: AWS::CloudFormation::Stack
    DependsOn:
      - devVpc
      - routeTable
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/vpc/subnet.yaml
      Parameters:
        vpcId:
          Fn::GetAtt:
            - devVpc
            - Outputs.vpcId
        publicSubnetRouteTableId:
          Fn::GetAtt:
            - routeTable
            - Outputs.publicSubnetRouteTableId
        ipv6CidrBlock:
          Fn::GetAtt:
            - devVpc
            - Outputs.ipv6CidrBlock
  ec2SecurityGroup:
    Type: AWS::CloudFormation::Stack
    DependsOn:
      - devVpc
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/security-group/main.yaml
      Parameters:
        vpcId:
          Fn::GetAtt:
            - devVpc
            - Outputs.vpcId
  ec2Instance:
    Type: AWS::CloudFormation::Stack
    DependsOn:
      - sshKeyPair
      - devVpc
      - internetGateway
      - routeTable
      - devPublicSubnet
      - ec2SecurityGroup
    Properties:
      TemplateURL: https://bucket-cf-template.s3.ap-southeast-1.amazonaws.com/ec2/main.yaml
      Parameters:
        securityGroupId:
          Fn::GetAtt:
            - ec2SecurityGroup
            - Outputs.securityGroupId
        publicSubnetId:
          Fn::GetAtt:
            - devPublicSubnet
            - Outputs.publicSubnetId