AWS EKS VPC Template

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AWSTemplateFormatVersion: '2010-09-09' Description: 'Amazon EKS Sample VPC'

Parameters:

VpcBlock: Type: String Default: 192.168.0.0/16 Description: The CIDR range for the VPC. This should be a valid private (RFC 1918) CIDR range.

Subnet01Block: Type: String Default: 192.168.64.0/18 Description: CidrBlock for subnet 01 within the VPC

Subnet02Block: Type: String Default: 192.168.128.0/18 Description: CidrBlock for subnet 02 within the VPC

Subnet03Block: Type: String Default: 192.168.192.0/18 Description: CidrBlock for subnet 03 within the VPC

Metadata: AWS::CloudFormation::Interface: ParameterGroups: - Label: default: "Worker Network Configuration" Parameters: - VpcBlock - Subnet01Block - Subnet02Block - Subnet03Block

Resources: VPC: Type: AWS::EC2::VPC Properties: CidrBlock: !Ref VpcBlock EnableDnsSupport: true EnableDnsHostnames: true Tags: - Key: Name Value: !Sub '${AWS::StackName}-VPC'

InternetGateway: Type: "AWS::EC2::InternetGateway"

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

RouteTable: Type: AWS::EC2::RouteTable Properties: VpcId: !Ref VPC Tags: - Key: Name Value: Public Subnets - Key: Network Value: Public

Route: DependsOn: VPCGatewayAttachment Type: AWS::EC2::Route Properties: RouteTableId: !Ref RouteTable DestinationCidrBlock: 0.0.0.0/0 GatewayId: !Ref InternetGateway

Subnet01: Type: AWS::EC2::Subnet Metadata: Comment: Subnet 01 Properties: AvailabilityZone: Fn::Select: - '0' - Fn::GetAZs: Ref: AWS::Region CidrBlock: Ref: Subnet01Block VpcId: Ref: VPC Tags: - Key: Name Value: !Sub "${AWS::StackName}-Subnet01"

Subnet02: Type: AWS::EC2::Subnet Metadata: Comment: Subnet 02 Properties: AvailabilityZone: Fn::Select: - '1' - Fn::GetAZs: Ref: AWS::Region CidrBlock: Ref: Subnet02Block VpcId: Ref: VPC Tags: - Key: Name Value: !Sub "${AWS::StackName}-Subnet02"

Subnet03: Type: AWS::EC2::Subnet Metadata: Comment: Subnet 03 Properties: AvailabilityZone: Fn::Select: - '2' - Fn::GetAZs: Ref: AWS::Region CidrBlock: Ref: Subnet03Block VpcId: Ref: VPC Tags: - Key: Name Value: !Sub "${AWS::StackName}-Subnet03"

Subnet01RouteTableAssociation: Type: AWS::EC2::SubnetRouteTableAssociation Properties: SubnetId: !Ref Subnet01 RouteTableId: !Ref RouteTable

Subnet02RouteTableAssociation: Type: AWS::EC2::SubnetRouteTableAssociation Properties: SubnetId: !Ref Subnet02 RouteTableId: !Ref RouteTable

Subnet03RouteTableAssociation: Type: AWS::EC2::SubnetRouteTableAssociation Properties: SubnetId: !Ref Subnet03 RouteTableId: !Ref RouteTable

ControlPlaneSecurityGroup: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Cluster communication with worker nodes VpcId: !Ref VPC

Outputs:

SubnetIds: Description: All subnets in the VPC Value: !Join [ ",", [ !Ref Subnet01, !Ref Subnet02, !Ref Subnet03 ] ]

SecurityGroups: Description: Security group for the cluster control plane communication with worker nodes Value: !Join [ ",", [ !Ref ControlPlaneSecurityGroup ] ]

VpcId: Description: The VPC Id Value: !Ref VPC