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AWS CloudFormation template to create public/private subnets in a VPC with a NAT Gateway.
# This creates a VPC with two public subnets and two private subnets in two Availability Zones,
# together with a NAT Gateway and associated routing. Change the Availability Zone locations as needed.
# Important: this configures various AWS services and there are costs associated with these services after the Free Tier usage.
# Please see the AWS Pricing pages for details. You are responsible for any AWS costs incurred.
# No warranty is implied in this example.
# Usage from command line:
# aws cloudformation --region <<YOUR-REGION>> create-stack --stack-name vpc- --template-body file://vpc-setup.yaml
Resources:
## VPC
PubPrivateVPC:
Type: AWS::EC2::VPC
Properties:
CidrBlock: 10.0.0.0/16
## SUBNETS
PublicSubnet1:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref PubPrivateVPC
AvailabilityZone: us-east-2a
CidrBlock: 10.0.1.0/24
MapPublicIpOnLaunch: true
PublicSubnet2:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref PubPrivateVPC
AvailabilityZone: us-east-2b
CidrBlock: 10.0.2.0/24
MapPublicIpOnLaunch: true
PrivateSubnet1:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref PubPrivateVPC
AvailabilityZone: us-east-2a
CidrBlock: 10.0.3.0/24
MapPublicIpOnLaunch: false
PrivateSubnet2:
Type: AWS::EC2::Subnet
Properties:
VpcId: !Ref PubPrivateVPC
AvailabilityZone: us-east-2b
CidrBlock: 10.0.4.0/24
MapPublicIpOnLaunch: false
## INTERNET GATEWAY
InternetGateway:
Type: AWS::EC2::InternetGateway
GatewayToInternet:
Type: AWS::EC2::VPCGatewayAttachment
Properties:
VpcId: !Ref PubPrivateVPC
InternetGatewayId: !Ref InternetGateway
## PUBLIC ROUTING
PublicRouteTable:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref PubPrivateVPC
PublicRoute:
Type: AWS::EC2::Route
DependsOn: GatewayToInternet
Properties:
RouteTableId: !Ref PublicRouteTable
DestinationCidrBlock: 0.0.0.0/0
GatewayId: !Ref InternetGateway
PublicSubnet1RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
SubnetId: !Ref PublicSubnet1
RouteTableId: !Ref PublicRouteTable
PublicSubnet2RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
SubnetId: !Ref PublicSubnet2
RouteTableId: !Ref PublicRouteTable
## NAT GATEWAY
NatGateway:
Type: AWS::EC2::NatGateway
DependsOn: NatPublicIP
Properties:
SubnetId: !Ref PublicSubnet1
AllocationId: !GetAtt NatPublicIP.AllocationId
## ELASTIC IP
NatPublicIP:
Type: AWS::EC2::EIP
DependsOn: PubPrivateVPC
Properties:
Domain: vpc
## PRIVATE ROUTING
PrivateRouteTable:
Type: AWS::EC2::RouteTable
Properties:
VpcId: !Ref PubPrivateVPC
PrivateRoute:
Type: AWS::EC2::Route
Properties:
NatGatewayId: !Ref NatGateway
RouteTableId: !Ref PrivateRouteTable
DestinationCidrBlock: 0.0.0.0/0
PrivateSubnet1RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
SubnetId: !Ref PrivateSubnet1
RouteTableId: !Ref PrivateRouteTable
PrivateSubnet2RouteTableAssociation:
Type: AWS::EC2::SubnetRouteTableAssociation
Properties:
SubnetId: !Ref PrivateSubnet2
RouteTableId: !Ref PrivateRouteTable
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