This is an AWS CloudFormation template to create a VPC environment with public and private subnets. The subnets will be located at two different availability zones:
- Availability Zone 1
- Public Subnet 1
- Private Subnet 1
- Availability Zone 2
- Public Subnet 2
- Private Subnet 2
This template also create an NAT instance inside public subnet 1.
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{ | |
"AWSTemplateFormatVersion": "2010-09-09", | |
"Description": "A VPC environment in two availability zones with an NAT instance.", | |
"Parameters": { | |
"envPrefix": { | |
"Description": "Environment name prefix.", | |
"Type": "String", | |
"Default": "Test" | |
}, | |
"vpcCidr": { | |
"Description": "VPC CIDR block.", | |
"Type": "String", | |
"Default": "10.4.0.0/16", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x." | |
}, | |
"publicSubnet1Cidr": { | |
"Description": "Public subnet 1 CIDR block.", | |
"Type": "String", | |
"Default": "10.4.0.0/24", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x and subnet of VPC." | |
}, | |
"privateSubnet1Cidr": { | |
"Description": "Private subnet 1 CIDR block.", | |
"Type": "String", | |
"Default": "10.4.1.0/24", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x and subnet of VPC." | |
}, | |
"publicSubnet2Cidr": { | |
"Description": "Public subnet 2 CIDR block.", | |
"Type": "String", | |
"Default": "10.4.10.0/24", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x and subnet of VPC." | |
}, | |
"privateSubnet2Cidr": { | |
"Description": "Private subnet 2 CIDR block.", | |
"Type": "String", | |
"Default": "10.4.11.0/24", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "Must be a valid IP CIDR range of the form x.x.x.x/x and subnet of VPC." | |
}, | |
"subnet1AZ": { | |
"Description": "Subnet 1 availability zone.", | |
"Type": "AWS::EC2::AvailabilityZone::Name" | |
}, | |
"subnet2AZ": { | |
"Description": "Subnet 2 availability zone.", | |
"Type": "AWS::EC2::AvailabilityZone::Name" | |
}, | |
"natInstanceType": { | |
"Description": "Amazon EC2 instance type for the NAT instance. This instance will be put on public subnet 1.", | |
"Type": "String", | |
"Default": "t2.small", | |
"AllowedValues": [ | |
"t2.micro", "t2.small", "t2.medium", "t2.large", | |
"m3.medium", "m3.large", "m3.xlarge", "m3.2xlarge", | |
"m4.large", "m4.xlarge", "m4.2xlarge", "m4.4xlarge", "m4.10xlarge" | |
] | |
}, | |
"natSshAccessCidr": { | |
"Description": "IP CIDR from where you could SSH into NAT instance", | |
"Type": "String", | |
"MinLength": "9", | |
"MaxLength": "18", | |
"Default": "0.0.0.0/0", | |
"AllowedPattern": "(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})/(\\d{1,2})", | |
"ConstraintDescription": "must be a valid CIDR range of the form x.x.x.x/x." | |
}, | |
"natKeyName": { | |
"Description" : "Name of an existing EC2 KeyPair to enable SSH access to NAT instances.", | |
"Type": "AWS::EC2::KeyPair::KeyName", | |
"ConstraintDescription" : "Must be the name of an existing EC2 KeyPair." | |
} | |
}, | |
"Mappings": { | |
"AWSNATAMI": { | |
"eu-central-1" : {"AMI": "ami-46073a5b"}, | |
"sa-east-1" : {"AMI": "ami-fbfa41e6"}, | |
"ap-northeast-1" : {"AMI": "ami-03cf3903"}, | |
"eu-west-1" : {"AMI": "ami-6975eb1e"}, | |
"us-east-1" : {"AMI": "ami-303b1458"}, | |
"us-west-1" : {"AMI": "ami-7da94839"}, | |
"us-west-2" : {"AMI": "ami-69ae8259"}, | |
"ap-southeast-2" : {"AMI": "ami-e7ee9edd"}, | |
"ap-southeast-1" : {"AMI": "ami-b49dace6"} | |
} | |
}, | |
"Resources": { | |
"vpc": { | |
"Type": "AWS::EC2::VPC", | |
"Properties": { | |
"CidrBlock": {"Ref": "vpcCidr"}, | |
"InstanceTenancy": "default", | |
"EnableDnsSupport": "true", | |
"EnableDnsHostnames": "true", | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "VPC"]]} | |
} | |
] | |
} | |
}, | |
"publicSubnet1": { | |
"Type": "AWS::EC2::Subnet", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"CidrBlock": {"Ref": "publicSubnet1Cidr"}, | |
"AvailabilityZone": {"Ref" : "subnet1AZ"}, | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "Subnet-Public-1"]]} | |
} | |
] | |
} | |
}, | |
"privateSubnet1": { | |
"Type": "AWS::EC2::Subnet", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"CidrBlock": {"Ref": "privateSubnet1Cidr"}, | |
"AvailabilityZone": {"Ref" : "subnet1AZ"}, | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "Subnet-Private-1"]]} | |
} | |
] | |
} | |
}, | |
"publicSubnet2": { | |
"Type": "AWS::EC2::Subnet", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"CidrBlock": {"Ref": "publicSubnet2Cidr"}, | |
"AvailabilityZone": {"Ref" : "subnet2AZ"}, | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "Subnet-Public-2"]]} | |
} | |
] | |
} | |
}, | |
"privateSubnet2": { | |
"Type": "AWS::EC2::Subnet", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"CidrBlock": {"Ref": "privateSubnet2Cidr"}, | |
"AvailabilityZone": {"Ref" : "subnet2AZ"}, | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "Subnet-Private-2"]]} | |
} | |
] | |
} | |
}, | |
"inetGateway": { | |
"Type": "AWS::EC2::InternetGateway", | |
"DependsOn": ["vpc"], | |
"Properties": { | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "InternetGateway"]]} | |
} | |
] | |
} | |
}, | |
"attachGateway": { | |
"Type": "AWS::EC2::VPCGatewayAttachment", | |
"DependsOn": ["vpc", "inetGateway"], | |
"Properties": { | |
"VpcId": {"Ref": "vpc"}, | |
"InternetGatewayId": {"Ref": "inetGateway"} | |
} | |
}, | |
"rtbPublic": { | |
"Type": "AWS::EC2::RouteTable", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "RTB-Public"]]} | |
} | |
] | |
} | |
}, | |
"routePublic": { | |
"Type": "AWS::EC2::Route", | |
"DependsOn": ["rtbPublic"], | |
"Properties": { | |
"DestinationCidrBlock": "0.0.0.0/0", | |
"RouteTableId": {"Ref": "rtbPublic"}, | |
"GatewayId": {"Ref": "inetGateway"} | |
}, | |
"DependsOn": "attachGateway" | |
}, | |
"subnetRouteTableAssociationPublic1": { | |
"Type": "AWS::EC2::SubnetRouteTableAssociation", | |
"DependsOn": ["rtbPublic", "publicSubnet1"], | |
"Properties": { | |
"RouteTableId": {"Ref": "rtbPublic"}, | |
"SubnetId": {"Ref": "publicSubnet1"} | |
} | |
}, | |
"subnetRouteTableAssociationPublic2": { | |
"Type": "AWS::EC2::SubnetRouteTableAssociation", | |
"DependsOn": ["rtbPublic", "publicSubnet2"], | |
"Properties": { | |
"RouteTableId": {"Ref": "rtbPublic"}, | |
"SubnetId": {"Ref": "publicSubnet2"} | |
} | |
}, | |
"rtbPrivate": { | |
"Type": "AWS::EC2::RouteTable", | |
"DependsOn": ["vpc"], | |
"Properties": { | |
"VpcId": {"Ref": "vpc"}, | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "RTB-Private"]]} | |
} | |
] | |
} | |
}, | |
"subnetRouteTableAssociationPrivate1": { | |
"Type": "AWS::EC2::SubnetRouteTableAssociation", | |
"DependsOn": ["rtbPublic", "privateSubnet1"], | |
"Properties": { | |
"RouteTableId": {"Ref": "rtbPrivate"}, | |
"SubnetId": {"Ref": "privateSubnet1"} | |
} | |
}, | |
"subnetRouteTableAssociationPrivate2": { | |
"Type": "AWS::EC2::SubnetRouteTableAssociation", | |
"DependsOn": ["rtbPublic", "privateSubnet2"], | |
"Properties": { | |
"RouteTableId": {"Ref": "rtbPrivate"}, | |
"SubnetId": {"Ref": "privateSubnet2"} | |
} | |
}, | |
"natEc2Instance": { | |
"Type": "AWS::EC2::Instance", | |
"DependsOn": ["vpc", "attachGateway", "publicSubnet1", "sgNAT"], | |
"Properties": { | |
"DisableApiTermination": "false", | |
"InstanceInitiatedShutdownBehavior": "stop", | |
"InstanceType": {"Ref": "natInstanceType"}, | |
"ImageId": {"Fn::FindInMap": ["AWSNATAMI", {"Ref": "AWS::Region"}, "AMI"]}, | |
"KeyName": {"Ref": "natKeyName"}, | |
"Monitoring": "false", | |
"SourceDestCheck": "false", | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "NAT"]]} | |
} | |
], | |
"NetworkInterfaces": [ | |
{ | |
"DeleteOnTermination": "true", | |
"Description": "Primary network interface", | |
"DeviceIndex": 0, | |
"SubnetId": {"Ref": "publicSubnet1"}, | |
"GroupSet": [ | |
{"Ref": "sgNAT"} | |
], | |
"AssociatePublicIpAddress": "true" | |
} | |
] | |
} | |
}, | |
"sgNAT": { | |
"Type": "AWS::EC2::SecurityGroup", | |
"DependsOn": ["vpc", "attachGateway"], | |
"Properties": { | |
"GroupDescription": "Security group for NAT instances", | |
"VpcId": {"Ref": "vpc"}, | |
"SecurityGroupIngress": [ | |
{ | |
"IpProtocol": "tcp", | |
"FromPort": "0", | |
"ToPort": "1024", | |
"CidrIp": {"Ref": "privateSubnet1Cidr"} | |
}, | |
{ | |
"IpProtocol": "udp", | |
"FromPort": "0", | |
"ToPort": "1024", | |
"CidrIp": {"Ref": "privateSubnet1Cidr"} | |
}, | |
{ | |
"IpProtocol": "tcp", | |
"FromPort": "0", | |
"ToPort": "1024", | |
"CidrIp": {"Ref": "privateSubnet2Cidr"} | |
}, | |
{ | |
"IpProtocol": "udp", | |
"FromPort": "0", | |
"ToPort": "1024", | |
"CidrIp": {"Ref": "privateSubnet2Cidr"} | |
}, | |
{ | |
"IpProtocol": "tcp", | |
"FromPort": "22", | |
"ToPort": "22", | |
"CidrIp": {"Ref": "natSshAccessCidr"} | |
} | |
], | |
"SecurityGroupEgress": [ | |
{ | |
"IpProtocol": "-1", | |
"CidrIp": "0.0.0.0/0" | |
} | |
], | |
"Tags": [ | |
{ | |
"Key": "Name", | |
"Value": {"Fn::Join" : ["-", [{"Ref" : "envPrefix"}, "SG-NAT"]]} | |
} | |
] | |
} | |
}, | |
"routePrivate": { | |
"Type": "AWS::EC2::Route", | |
"Properties": { | |
"DestinationCidrBlock": "0.0.0.0/0", | |
"RouteTableId": {"Ref": "rtbPrivate"}, | |
"InstanceId": {"Ref": "natEc2Instance"} | |
} | |
} | |
} | |
} |