AWSTemplateFormatVersion: 2010-09-09

Description: Lab7 Task 1 template which builds VPC, supporting resources, a basic networking structure, and some Security groups for use in later tasks.

Parameters:
  VPCCIDR:
    Description: CIDR Block for VPC
    Type: String
    Default: 10.0.0.0/16
    AllowedValues:
      - 10.0.0.0/16

  PublicSubnet1Param:
    Description: Public Subnet 1
    Type: String
    Default: 10.0.0.0/24
    AllowedValues:
      - 10.0.0.0/24

  PublicSubnet2Param:
    Description: Public Subnet 2
    Type: String
    Default: 10.0.1.0/24
    AllowedValues:
      - 10.0.1.0/24

  AppSubnet1Param:
    Description: App Subnet 1
    Type: String
    Default: 10.0.2.0/24
    AllowedValues:
      - 10.0.2.0/24

  AppSubnet2Param:
    Description: App Subnet 2
    Type: String
    Default: 10.0.3.0/24
    AllowedValues:
      - 10.0.3.0/24

  DatabaseSubnet1Param:
    Description: Private Subnet 1
    Type: String
    Default: 10.0.4.0/24
    AllowedValues:
      - 10.0.4.0/24

  DatabaseSubnet2Param:
    Description: Private Subnet 2
    Type: String
    Default: 10.0.5.0/24
    AllowedValues:
      - 10.0.5.0/24

Resources:
###########
# VPC and Network Structure
###########
  LabVPC:
    Type: 'AWS::EC2::VPC'
    Properties:
      CidrBlock: !Ref VPCCIDR
      EnableDnsSupport: True
      EnableDnsHostnames: True
      InstanceTenancy: 'default'
      Tags:
        - Key: Name
          Value: LabVPC

  LabInternetGateway:
    Type: 'AWS::EC2::InternetGateway'

  AttachGateway:
    Type: 'AWS::EC2::VPCGatewayAttachment'
    Properties:
      VpcId: !Ref LabVPC
      InternetGatewayId: !Ref LabInternetGateway

#NATs
  NATGateway1:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt ElasticIPAddress1.AllocationId
      SubnetId: !Ref PublicSubnet1
      Tags:
        - Key: Name
          Value: NATGateway1

  ElasticIPAddress1:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

  NATGateway2:
    Type: AWS::EC2::NatGateway
    Properties:
      AllocationId: !GetAtt ElasticIPAddress2.AllocationId
      SubnetId: !Ref PublicSubnet2
      Tags:
        - Key: Name
          Value: NATGateway2

  ElasticIPAddress2:
    Type: AWS::EC2::EIP
    Properties:
      Domain: vpc

#Subnets
  PublicSubnet1:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref PublicSubnet1Param
      MapPublicIpOnLaunch: True
      AvailabilityZone: !Select
        - '0'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: PublicSubnet1

  PublicSubnet2:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref PublicSubnet2Param
      MapPublicIpOnLaunch: True
      AvailabilityZone: !Select
        - '1'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: PublicSubnet2

  AppSubnet1:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref AppSubnet1Param
      MapPublicIpOnLaunch: False
      AvailabilityZone: !Select
        - '0'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: AppSubnet1

  AppSubnet2:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref AppSubnet2Param
      MapPublicIpOnLaunch: False
      AvailabilityZone: !Select
        - '1'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: AppSubnet2

  DatabaseSubnet1:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref DatabaseSubnet1Param
      MapPublicIpOnLaunch: False
      AvailabilityZone: !Select
        - '0'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: DatabaseSubnet1

  DatabaseSubnet2:
    Type: 'AWS::EC2::Subnet'
    Properties:
      VpcId: !Ref LabVPC
      CidrBlock: !Ref DatabaseSubnet2Param
      MapPublicIpOnLaunch: False
      AvailabilityZone: !Select
        - '1'
        - !GetAZs ''
      Tags:
        - Key: Name
          Value: DatabaseSubnet2

#Routing
#Route Tables
  PublicRouteTable:
    Type: 'AWS::EC2::RouteTable'
    Properties:
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: PublicRouteTable

  PrivateRouteTableAZ1:
    Type: 'AWS::EC2::RouteTable'
    Properties:
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: PrivateRouteTableAZ1

  PrivateRouteTableAZ2:
    Type: 'AWS::EC2::RouteTable'
    Properties:
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: PrivateRouteTableAZ2
#Routes
  PublicRoute:
    Type: 'AWS::EC2::Route'
    Properties:
      RouteTableId: !Ref PublicRouteTable
      DestinationCidrBlock: 0.0.0.0/0
      GatewayId: !Ref LabInternetGateway

  PrivateRouteAZ1:
    Type: 'AWS::EC2::Route'
    Properties:
      RouteTableId: !Ref PrivateRouteTableAZ1
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NATGateway1

  PrivateRouteAZ2:
    Type: 'AWS::EC2::Route'
    Properties:
      RouteTableId: !Ref PrivateRouteTableAZ2
      DestinationCidrBlock: 0.0.0.0/0
      NatGatewayId: !Ref NATGateway2
#Subnet Associations
  PublicSubnet1RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref PublicSubnet1
      RouteTableId: !Ref PublicRouteTable

  PublicSubnet2RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref PublicSubnet2
      RouteTableId: !Ref PublicRouteTable

  AppSubnet1RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref AppSubnet1
      RouteTableId: !Ref PrivateRouteTableAZ1

  AppSubnet2RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref AppSubnet2
      RouteTableId: !Ref PrivateRouteTableAZ2

  DatabaseSubnet1RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref DatabaseSubnet1
      RouteTableId: !Ref PrivateRouteTableAZ1

  DatabaseSubnet2RouteTableAssociation:
    Type: 'AWS::EC2::SubnetRouteTableAssociation'
    Properties:
      SubnetId: !Ref DatabaseSubnet2
      RouteTableId: !Ref PrivateRouteTableAZ2

###########
# Security Groups
###########
  AppInstanceSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: Security Group allowing HTTP traffic for lab instances
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: AppInstanceSecurityGroup
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 80
          ToPort: 80
          CidrIp: 0.0.0.0/0

  RDSSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: Security Group allowing RDS instances to have internet traffic
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: RDSSecurityGroup
      SecurityGroupIngress:
        - IpProtocol: tcp
          FromPort: 3306
          ToPort: 3306
          CidrIp: 0.0.0.0/0

  EFSMountTargetSecurityGroup:
    Type: 'AWS::EC2::SecurityGroup'
    Properties:
      GroupDescription: Security Group allowing traffic between EFS Mount Targets and Amazon EC2 instances
      VpcId: !Ref LabVPC
      Tags:
        - Key: Name
          Value: EFSMountTargetSecurityGroup
      SecurityGroupIngress:
        - IpProtocol: tcp
          SourceSecurityGroupId: !Ref AppInstanceSecurityGroup
          FromPort: 80
          ToPort: 80
        - IpProtocol: TCP
          FromPort: 2049
          ToPort: 2049
          CidrIp: 0.0.0.0/0

Outputs:

  Region:
    Description: "Lab Region"
    Value: !Ref AWS::Region
    
  DatabaseSubnet1CIDR:
    Description: "CIDR block for the DB Subnet in AZ a"
    Value: !Ref DatabaseSubnet1Param

  DatabaseSubnet2CIDR:
    Description: "CIDR block for the DB Subnet in AZ b"
    Value: !Ref DatabaseSubnet2Param

  DatabaseSubnet1ID:
    Description: "The Subnet ID for the DB Subnet in AZ a"
    Value: !Ref DatabaseSubnet1
    Export:
      Name: "DatabaseSubnet1ID"

  DatabaseSubnet2ID:
    Description: "The Subnet ID for the DB Subnet in AZ b"
    Value: !Ref DatabaseSubnet2
    Export:
      Name: "DatabaseSubnet2ID"

  AppInstanceSecurityGroupID:
    Description: "The Security Group ID for the Lab Instance Security Group"
    Value: !Ref AppInstanceSecurityGroup
    Export:
      Name: "AppInstanceSecurityGroupID"

  EFSMountTargetSecurityGroupID:
    Description: "The Security Group ID for the Lab EFS Mount Target"
    Value: !Ref EFSMountTargetSecurityGroup
    Export:
      Name: "EFSMountTargetSecurityGroupID"

  RDSSecurityGroupID:
    Description: "The Security Group ID for the Lab RDS cluster"
    Value: !Ref RDSSecurityGroup
    Export:
      Name: "RDSSecurityGroupID"

  VPCID:
    Description: "The VPC ID for the lab"
    Value: !Ref LabVPC
    Export:
      Name: "VPCID"