CloudFormation

Parameters: KeyName: Description: Name of an existing EC2 KeyPair to enable SSH access to the instances. Linked to AWS Parameter Type: AWS::EC2::KeyPair::KeyName ConstraintDescription: must be the name of an existing EC2 KeyPair. LatestAmiId: Description: (DO NOT CHANGE) Type: 'AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>' Default: '/aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2' AllowedValues: - /aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2 Resources: MyInstance: Type: AWS::EC2::Instance Properties: ImageId: !Ref LatestAmiId InstanceType: t2.micro KeyName: !Ref KeyName Tags: - Key: Name Value: WebServer SecurityGroups: - !Ref MySG UserData: Fn::Base64: !Sub | #!/bin/bash yum install httpd -y systemctl start httpd && systemctl enable httpd echo "<h1>Test Web Server</h1>" > /var/www/html/index.html MySG: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Enable HTTP access via port 80 and SSH access via port 22 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