How to Create a VPC Using Cloudformation

Below Are the Points which we will following in sequence.

1. Create VPC
2. Create Public Subnets
3. Create Internet Gateway
4. Attach the Internet Gateway to the VPC
5. Create Public Route Table
6. Create Public Route and add to the Public Route Table
7. Associate the Public Subnets with the Public Route Table
8. Create EC2 Instance
9. Create SSH Key Pair
10. Create ElasitcIP
11. Create Security Group

 

Initially we will create new file name as main.yaml and will add below format, which is described in one by one steps.

Create New File: main.yaml

Let's add Cloud formation Template Format Version and Description.

AWSTemplateFormatVersion: '2010-09-09' Description: Template to Create an VPC, Subnet, Route, EIP and associate with instance

Step 1) Create VPC

Resources: MYVPC: Type: AWS::EC2::VPC Properties: CidrBlock: 10.0.0.0/16 EnableDnsSupport: 'true' EnableDnsHostnames: 'true' InstanceTenancy: default Tags: - Key: Name Value: My Demo VPC

Step 2) Create Public Subnets

MYSUBNET: Type: AWS::EC2::Subnet Properties: VpcId: !Ref MYVPC CidrBlock: 10.0.0.0/24 AvailabilityZone: "us-east-1a" Tags: - Key: Name Value: My Demo Public Subnet

Step 3) Create Internet Gateway

MYIGW: Type: AWS::EC2::InternetGateway Properties: Tags: - Key: Name Value: My Demo IGW

Step 4) Attach the Internet Gateway to the VPC

IGWATTACHTOVPC: Type: AWS::EC2::VPCGatewayAttachment Properties: InternetGatewayId: !Ref MYIGW VpcId: !Ref MYVPC

Step 5) Create Public Route Table

MYROUTETABLE: Type: AWS::EC2::RouteTable Properties: VpcId: !Ref MYVPC Tags: - Key: Name Value: My Demo Route Table

Step 6) Create Public Route and add to the Public Route Table

PUBLICROUTE: Type: AWS::EC2::Route Properties: DestinationCidrBlock: 0.0.0.0/0 GatewayId: !Ref MYIGW RouteTableId: !Ref MYROUTETABLE

Step 7) Associate the Public Subnets with the Public Route Table

SUBNETROUTETABLEASSOCIATION: Type: AWS::EC2::SubnetRouteTableAssociation Properties: RouteTableId: !Ref MYROUTETABLE SubnetId: !Ref MYSUBNET

Step 8) Create EC2 Instance

MYEC2INSTANCE: Type: AWS::EC2::Instance Properties: ImageId: ami-0574da719dca65348 InstanceType: "t2.micro" SubnetId: !Ref MYSUBNET KeyName: !Ref MYEC2KEYPAIR SecurityGroupIds: - !Ref MYSG Tags: - Key: Name Value: My Demo EC2 Instance

Step 9) Create SSH Key Pair

MYEC2KEYPAIR: Type: AWS::EC2::KeyPair Properties: KeyName: my demo pem file PublicKeyMaterial: ssh-rsa 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 administrator@administrator Tags: - Key: Name Value: My Demo EC2 Keypair

Step 10) Create ElasitcIP 

MYEIP: Type: AWS::EC2::EIP Properties: InstanceId: !Ref MYEC2INSTANCE Tags: - Key: Name Value: My Demo EIP For EC2

Step 11) Create Security Group

MYSG: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Allow http to client host VpcId: !Ref MYVPC SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 CidrIp: 0.0.0.0/0 - IpProtocol: tcp FromPort: 22 ToPort: 22 CidrIp: 0.0.0.0/0 SecurityGroupEgress: - IpProtocol: -1 CidrIp: 0.0.0.0/0 Tags: - Key: Name Value: My Demo SG For EC2

 

" If You are Still Struggling to align all the Resources into single template, 

So don't worry I am sharing complete template below."

 

AWSTemplateFormatVersion: '2010-09-09' Description: Template to Create an EC2 instance, EIP and associate with instance Resources: MYVPC: Type: AWS::EC2::VPC Properties: CidrBlock: 10.0.0.0/16 EnableDnsSupport: 'true' EnableDnsHostnames: 'true' InstanceTenancy: default Tags: - Key: Name Value: My Demo VPC MYSUBNET: Type: AWS::EC2::Subnet Properties: VpcId: !Ref MYVPC CidrBlock: 10.0.0.0/24 AvailabilityZone: "us-east-1a" Tags: - Key: Name Value: My Demo Public Subnet MYIGW: Type: AWS::EC2::InternetGateway Properties: Tags: - Key: Name Value: My Demo IGW IGWATTACHTOVPC: Type: AWS::EC2::VPCGatewayAttachment Properties: InternetGatewayId: !Ref MYIGW VpcId: !Ref MYVPC MYROUTETABLE: Type: AWS::EC2::RouteTable Properties: VpcId: !Ref MYVPC Tags: - Key: Name Value: My Demo Route Table PUBLICROUTE: Type: AWS::EC2::Route Properties: DestinationCidrBlock: 0.0.0.0/0 GatewayId: !Ref MYIGW RouteTableId: !Ref MYROUTETABLE SUBNETROUTETABLEASSOCIATION: Type: AWS::EC2::SubnetRouteTableAssociation Properties: RouteTableId: !Ref MYROUTETABLE SubnetId: !Ref MYSUBNET MYEC2INSTANCE: Type: AWS::EC2::Instance Properties: ImageId: ami-0574da719dca65348 InstanceType: "t2.micro" SubnetId: !Ref MYSUBNET KeyName: !Ref MYEC2KEYPAIR SecurityGroupIds: - !Ref MYSG Tags: - Key: Name Value: My Demo EC2 Instance MYEC2KEYPAIR: Type: AWS::EC2::KeyPair Properties: KeyName: my demo pem file PublicKeyMaterial: ssh-rsa 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 administrator@administrator Tags: - Key: Name Value: My Demo EC2 Keypair MYEIP: Type: AWS::EC2::EIP Properties: InstanceId: !Ref MYEC2INSTANCE Tags: - Key: Name Value: My Demo EIP For EC2 MYSG: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Allow http to client host VpcId: !Ref MYVPC SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 CidrIp: 0.0.0.0/0 - IpProtocol: tcp FromPort: 22 ToPort: 22 CidrIp: 0.0.0.0/0 SecurityGroupEgress: - IpProtocol: -1 CidrIp: 0.0.0.0/0 Tags: - Key: Name Value: My Demo SG For EC2