MyServer.yml

Description: Udacity Project

Parameters:
  EnvironmentName:
    Description: An environment name that will be prefixed to resource names
    Type: String

Resources:
  LBSecGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Allows HTTP to our load balancer
      VpcId:
        Fn::ImportValue: !Sub "${EnvironmentName}-VPCID"
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0
      SecurityGroupEgress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0
  WebServerSecGroup:
    Type: AWS::EC2::SecurityGroup
    Properties:
      GroupDescription: Allows HTTP to our hosts and SSH from local only
      VpcId:
        Fn::ImportValue: !Sub "${EnvironmentName}-VPCID"
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0

      SecurityGroupEgress:
        - IpProtocol: tcp
          FromPort: 0
          ToPort: 65535
          CidrIp: 0.0.0.0/0
 
  WebAppLaunchConfig:
    Type: AWS::AutoScaling::LaunchConfiguration
    Properties:
      UserData:
        Fn::Base64: !Sub |
          #!/bin/bash
          apt-get update -y
          apt-get install unzip awscli -y
          apt-get install apache2 -y
          systemctl start apache2.service
          cd /var/www/html
          aws s3 cp s3://udacity-demo-1/udacity.zip .
          unzip -o udacity.zip
      ImageId: ami-003634241a8fcdec0
      IamInstanceProfile:
        Fn::ImportValue: !Sub "${EnvironmentName}-IAM-NAME" 
      SecurityGroups:
        - Ref: WebServerSecGroup
      InstanceType: t3.small
      BlockDeviceMappings:
        - DeviceName: "/dev/sdk"
          Ebs:
            VolumeSize: 10
  WebAppGroup:
    Type: AWS::AutoScaling::AutoScalingGroup
    Properties:
      VPCZoneIdentifier:
        - Fn::ImportValue: !Sub "${EnvironmentName}-PRIV-NETS"
      LaunchConfigurationName:
        Ref: WebAppLaunchConfig
      MinSize: "4"
      MaxSize: "5"
      TargetGroupARNs:
        - Ref: WebAppTargetGroup    
  WebAppLB:
    Type: AWS::ElasticLoadBalancingV2::LoadBalancer
    Properties:
      Subnets:
        - Fn::ImportValue: !Sub "${EnvironmentName}-PUB1-SN"
        - Fn::ImportValue: !Sub "${EnvironmentName}-PUB2-SN"
      SecurityGroups:
        - Ref: LBSecGroup
  
  Listener:
    Type: AWS::ElasticLoadBalancingV2::Listener
    Properties:
      DefaultActions:
        - Type: forward
          TargetGroupArn:
            Ref: WebAppTargetGroup
      LoadBalancerArn:
        Ref: WebAppLB
      Port: 80
      Protocol: HTTP
  ALBListenerRule:
    Type: AWS::ElasticLoadBalancingV2::ListenerRule
    Properties:
      Actions:
        - Type: forward
          TargetGroupArn: !Ref "WebAppTargetGroup"
      Conditions:
        - Field: path-pattern
          Values: [/]
      ListenerArn: !Ref "Listener"
      Priority: 1
  WebAppTargetGroup:
    Type: AWS::ElasticLoadBalancingV2::TargetGroup
    Properties:
      HealthCheckIntervalSeconds: 60
      HealthCheckPath: /
      HealthCheckProtocol: HTTP
      HealthCheckTimeoutSeconds: 30
      HealthyThresholdCount: 2
      Port: 80
      Protocol: HTTP
      UnhealthyThresholdCount: 10
      VpcId:
        Fn::ImportValue:
          Fn::Sub: "${EnvironmentName}-VPCID"
Outputs:
  Website:
    Description: The Public DNS of the load Balancer
    Value: !Join ["", ["http://", !GetAtt [WebAppLB, DNSName]]]