CFASGonly

AWSTemplateFormatVersion: 2010-09-09
Description: Create an autoscaling group using t2.micro EC2 instances across 2 public AZs in the default vpc. All EC2 instances should have Apache installed with the ability to check any EC2 created by the autoscaling groups Public IP address and be able to produce a test page. 

Resources:
  
  #Creating launch template that will install Apache upon any EC2 Instance startup
  MyLaunchTemplate:
    Type: AWS::EC2::LaunchTemplate
    Properties:
      LaunchTemplateName: Wk7LaunchTemplate
      LaunchTemplateData:
        ImageId: ami-0022f774911c1d690
        InstanceType: t2.micro
        KeyName: MyKeyPair
        SecurityGroups: 
        - !Ref MySecurityGroup
        UserData: 
          Fn::Base64: !Sub |
            #!/bin/bash
            yum update -y 
            yum install -y httpd 
            systemctl start httpd 
            systemctl enable httpd

  #This will create a security group and allow us to receive web traffic and ssh into the instances
  MySecurityGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Allow inbound traffic from HTTP and SSH
      SecurityGroupIngress:
        - CidrIp: 0.0.0.0/0
          FromPort: 80
          IpProtocol: tcp
          ToPort: 80
        - CidrIp: 0.0.0.0/0
          FromPort: 22
          IpProtocol: tcp
          ToPort: 22
  
  #Creating autoscaling group with desired minimum and maximum size
  MyASG:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      LaunchTemplate:
        LaunchTemplateId: !Ref MyLaunchTemplate
        Version: !GetAtt MyLaunchTemplate.LatestVersionNumber
      MinSize: 2
      MaxSize: 5
      DesiredCapacity: 2
      AvailabilityZones: 
      - us-east-1a
      - us-east-1b
      MetricsCollection:
      - Granularity: 1Minute