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---
Resources:
  MyInstance:
    Type: AWS::EC2::Instance
    Properties:
      AvailabilityZone: us-east-1a
      ImageId: ami-0a3c3a20c09d6f377
      InstanceType: t2.micro
      SecurityGroups:
        - !Ref SSHSecurityGroup
      # we install our web server with user data
      UserData: 
        Fn::Base64: |
          #!/bin/bash -xe
          dnf update -y
          dnf install -y httpd
          systemctl start httpd
          systemctl enable httpd
          echo "<h1>Hello World from user data</h1>" > /var/www/html/index.html          

  # our EC2 security group
  SSHSecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: SSH and HTTP
      SecurityGroupIngress:
      - CidrIp: 0.0.0.0/0
        FromPort: 22
        IpProtocol: tcp
        ToPort: 22
      - CidrIp: 0.0.0.0/0
        FromPort: 80
        IpProtocol: tcp
        ToPort: 80