CloudFormation template for single EC2 web server

cloudformation-single-web-server.yml

AWSTemplateFormatVersion: 2010-09-09
Metadata:
  MyMeta:
    apple: red
    bannna: yellow
Parameters:
  owner:
    Description: This stack owner's name
    Type: String
    Default: 'Shawn'
Resources:
  MyEC2SecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupName: MyWebSecurity
      GroupDescription: 'This is my web server security group'
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 22
          CidrIp: 0.0.0.0/0
          ToPort: 22
      Tags:
        - Key: Name
          Value: MySG
        - Key: CreatedBy
          Value: CloudFormation
  WebServerIngress:
    Type: 'AWS::EC2::SecurityGroupIngress'
    Properties:
      CidrIp: 0.0.0.0/0
      Description: WebServerIngress By CloudFormation
      FromPort: 80
      GroupName: !Ref MyEC2SecurityGroup
      IpProtocol: tcp
      ToPort: 80
  MyWebServer:
    Type: 'AWS::EC2::Instance'
    Properties:
      ImageId: ami-02b3330196502d247
      InstanceType: t2.micro
      SecurityGroups:
        - !Ref MyEC2SecurityGroup
      Tags:
        - Key: Name
          Value: !Sub
            - 'WebServerBy ${param}'
            - { param: !Ref owner }
      UserData:
        Fn::Base64:
          !Sub |
            #!/bin/bash
            yum update -y 
            yum install -y httpd.x86_64 
            systemctl start httpd.service
            systemctl enable httpd.service
            echo "Hello Cloud Formation from $(hostname -f)... at $(date)" > /var/www/html/index.html
Outputs:
  MyStackRegion:
    Description: This is the output description.
    Value: !Ref 'AWS::Region'
  StackOwner:
    Description: This stack creator
    Value: !Ref owner