EC2_Instance_Creation.yml

AWSTemplateFormatVersion: 2010-09-09
Description: >-
  AWS CloudFormation Sample Template EC2 Instance
Parameters:
  KeyName:
    Description: Name of an existing EC2 KeyPair to enable SSH access to the instances
    Type: 'AWS::EC2::KeyPair::KeyName'
    ConstraintDescription: must be the name of an existing EC2 KeyPair.
  InstanceType:
    Description: WebServer EC2 instance type
    Type: String
    Default: t2.small
    AllowedValues:
      - t1.micro
      - t2.nano
      - t2.micro
      - t2.small
    ConstraintDescription: must be a valid EC2 instance type.
  SSHLocation:
    Description: The IP address range that can be used to SSH to the EC2 instances
    Type: String
    MinLength: '9'
    MaxLength: '18'
    Default: 0.0.0.0/0
    AllowedPattern: '(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/(\d{1,2})'
    ConstraintDescription: must be a valid IP CIDR range of the form x.x.x.x/x.

Resources:
  WebServerSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: >-
        Enable HTTP access via port 80 locked down to the load balancer + SSH
        access
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: '22'
          ToPort: '22'
          CidrIp: !Ref SSHLocation
  WebServer:
    Type: 'AWS::EC2::Instance'
    Properties:
      ImageId: ami-97785bed 
      InstanceType: !Ref InstanceType
      SecurityGroups:
        - !Ref WebServerSecurityGroup
      KeyName: !Ref KeyName
Outputs:
  WebsiteURL:
    Value: !Join 
      - ''
      - - !GetAtt 
          - WebServer
          - PublicDnsName
    Description: EC2 Instance