instances.yaml

Description: >
    This template deploys high available ec2 instances to the provided VPC and subnets

Parameters:

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

    InstanceType:
        Description: Which instance type should we use to build the EC2 cluster?
        Type: String
        Default: m5.large

    InstanceImage:
        Description: Which Image type should use to build launch configs
        Type: AWS::EC2::Image::Id

    KeyPair:
        Description: An Amazon EC2 key pair name
        Type: AWS::EC2::KeyPair::KeyName
        

    IamInstanceProfile:
        Description: Instance Profile Name need to attach with ec2 instance
        Type: String
        Default: ""

    VPC:
        Description: Choose which VPC this EC2 cluster should be deployed to
        Type: AWS::EC2::VPC::Id
        
    Subnets:
        Description: Choose which subnets this EC2 cluster should be deployed to
        Type: List<AWS::EC2::Subnet::Id>

    SecurityGroup:
        Description: Select the Security Group to use for the EC2 cluster hosts
        Type: List<AWS::EC2::SecurityGroup::Id>

    FriendlyAppName:
        Description: Give us a friendly name for each instance to indentyfy from each
        Type: String

    IsEIP:
        Description : select true/false to assign an elstic ip
        Default: false
        Type: String
        AllowedValues:
            - true
            - false

Conditions:
   IamInstanceProfile: !Not [!Equals [!Ref IamInstanceProfile,""]]
   IsEIP:  !Equals [!Ref IsEIP,"true"]

Resources:

    EC2Instance:
        Type: AWS::EC2::Instance
        Properties:
            SubnetId: !Select [0,!Ref Subnets]
            InstanceType: !Ref InstanceType
            KeyName: !Ref KeyPair
            ImageId: !Ref InstanceImage
            SecurityGroupIds: !Ref SecurityGroup
            # BlockDeviceMappings:
            #     - DeviceName: /dev/sda1
            #       Ebs:
            #           VolumeSize: 8
            Tags:
                - Key: Name
                  Value: !Sub ${FriendlyAppName}

    EIP:
        Type: AWS::EC2::EIP
        DependsOn: EC2Instance
        Condition: IsEIP
        Properties:
            InstanceId: !Ref EC2Instance
            Domain: !Ref VPC