AWS CloudFormation

2019-06-26 in blog on blockchain

1. AWS CloudFormation

AWS CloudFormation

Creating an Amazon Virtual Private Cloud (VPC) with AWS CloudFormation

• An Amazon VPC
• An Internet Gateway
• Two Subnets
• Two Route Tables

Amazon VPC

AWSTemplateFormatVersion: 2010-09-09
Description: Deploy a VPC

Resources:
  VPC:
    Type: AWS::EC2::VPC
    Properties:
      CidrBlock: 10.0.0.0/16
      EnableDnsHostnames: true
      Tags:
      - Key: Name
        Value: Lab VPC

Internet Gateway

  InternetGateway:
    Type: AWS::EC2::InternetGateway
    Properties:
      Tags:
      - Key: Name
        Value: Lab Internet Gateway

Attach Gateway to VPC

  AttachGateway:
    Type: AWS::EC2::VPCGatewayAttachment
    Properties:
      VpcId: !Ref VPC
      InternetGatewayId: !Ref InternetGateway

Build Subnet

  PublicSubnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      CidrBlock: 10.0.0.0/24
      AvailabilityZone: !Select
        - '0'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: Public Subnet 1

  PrivateSubnet1:
    Type: AWS::EC2::Subnet
    Properties:
      VpcId: !Ref VPC
      CidrBlock: 10.0.1.0/24
      AvailabilityZone: !Select
        - '0'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: Private Subnet 1

!Select, !GetAZs means
Retrieving a list of Availability Zones with the region and is referencing the first element from the list.
In this manner, the list of Availability Zones at runtime rather than having the Availability Zones hard-coded in the template.

Build RouteTable

  PublicRouteTable:
    Type: AWS::EC2::RouteTable
    Properties:
      VpcId: !Ref VPC
      Tags:
        - Key: Name
          Value: Public Route Table

  PublicRoute:
    Type: AWS::EC2::Route
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref InternetGateway

  PublicSubnetRouteTableAssociation1:
    Type: AWS::EC2::SubnetRouteTableAssociation
    Properties:
      SubnetId: !Ref PublicSubnet1
      RouteTableId: !Ref PublicRouteTable

Outputs

Outputs:
  VPC:
    Description: VPC
    Value: !Ref VPC

  AZ1:
    Description: Availability Zone 1
    Value: !GetAtt
      - PublicSubnet1
      - AvailabilityZone