Resources:
  MyInstance:
    Type: 'AWS::EC2::Instance'
    Properties:
      AvailabilityZone: eu-west-1a
      ImageId:
        Ref: ImageId
      KeyName: !Ref KeyName
      InstanceType:
        Ref: InstanceType
      SubnetId: !Ref SubnetId
      SecurityGroupIds: !Ref SecurityGroupIds
      Tags:
        - Key: Name
          Value:
            Ref: InstanceName
        - Key: Environment
          Value:
            Ref: Environment
      BlockDeviceMappings:
      - DeviceName: /dev/sda1
        Ebs:
          VolumeType:
            Ref: VolumeType
          VolumeSize:
            Ref: VolumeSize
Parameters:
  InstanceType:
    Type: String
    Default: t2.micro
    AllowedValues:
      - t2.micro
      - t2.small
      - t2.medium
    Description: Enter t2.micro, t2.small, or t2.medium. Default is t2.micro.
  Environment:
    Type: String
    Default: dev
    AllowedValues:
      - dev
      - test
      - prod
    Description: Tags
  InstanceName:
    Type: String
  ImageId:
    Type: String
    AllowedValues:
      - ami-00035f41c82244dab
      - centos-7.6-plain-x86_64-181207_14-disk001-6f5e98a1-bc66-4b6a-a37d-efb4b2472f8a-ami-0372f888c4e669f49.4
  SecurityGroupIds:
    Type: List<AWS::EC2::SecurityGroup::Id>
  KeyName:
    Type: AWS::EC2::KeyPair::KeyName
  SubnetId:
    Type: AWS::EC2::Subnet::Id
  VolumeSize:
    Type: Number
    MinValue: 8
    MaxValue: 100
  VolumeType:
    Type: String
    Default: gp2
    AllowedValues:
      - gp2
      - st1
      - io1
      - sc1
    Description: gp2 = SSD, st1 = HDD, io1 = IOPS SSD, sc1 = Cold HDD