AWS CloudFormation EC2

cloudformation-ec2.yml

Resources:
  MyEC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      AvailabilityZone: us-east-1a
      ImageId: ami-068663a3c619dd892 # Ubuntu Server 20.04 LTS
      InstanceType: t2.micro
      KeyName: my-test-key # Existing key pair
      SecurityGroups:
        - !Ref MyEC2SecurityGroup
      Tags:
        -
          Key: Name
          Value: My EC2 Instance
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          apt-get update
          apt-get -y install nginx
          service nginx start
  MyEIP:
    Type: AWS::EC2::EIP
    Properties:
      InstanceId: !Ref MyEC2Instance
  MyEC2SecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: My EC2 Security group
      SecurityGroupIngress:
      - CidrIp: 0.0.0.0/0
        FromPort: 80
        IpProtocol: tcp
        ToPort: 80
      - CidrIp: 0.0.0.0/0
        FromPort: 443
        IpProtocol: tcp
        ToPort: 443

Usage

aws ec2 create-key-pair --key-name my-test-key
aws cloudformation create-stack --stack-name my-test-stack --template-body file://cloudformation-ec2.yml