template.yml

# Exercise - Rollback
AWSTemplateFormatVersion: 2010-09-09
Description: ND9991 C3 L4 
Resources:
  EC2Instance:
    Type: 'AWS::EC2::Instance'
    Properties:
      SecurityGroups:
        - !Ref InstanceSecurityGroup
      KeyName: AWS_Keypair_ND9991
      ImageId: 'ami-09e67e426f25ce0d7' # you may need to find out what instance types are available in your region - use https://cloud-images.ubuntu.com/locator/ec2/
      InstanceType: t3.micro
  InstanceSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: Enable SSH access via port 22
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: '22'
          ToPort: '22'
          CidrIp: 0.0.0.0/0