cf-template.yaml

AWSTemplateFormatVersion: 2010-09-09

Parameters:
  SelectStage:
    Type: String
    AllowedValues:
      - dev
      - stage
      - prod
    ConstraintDescription: must specify prod, dev, or stage.

  S3BucketName:
    Type: String
    AllowedPattern: '(?!(^xn--|.+-s3alias$))^[a-z0-9][a-z0-9-]{1,61}[a-z0-9]$'
    ConstraintDescription: ' Incorrect bucket naming convention'

Mappings: 
  EnvMap: 
    dev: 
      InstanceType : "t2.micro"
      name: 'dev setup'
    stage: 
      InstanceType : "t2.small"
      name: 'stage setup'
    prod: 
      InstanceType : "t2.large"
      name: 'prod setup'

Conditions:
  CreateProdResources: !Equals [!Ref SelectStage, prod]

Resources:
  EC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      InstanceType: !FindInMap [EnvMap, !Ref "SelectStage", InstanceType]
      ImageId: ami-09d3b3274b6c5d4aa
      Tags: 
      - Key: 'name'
        Value: !FindInMap [EnvMap, !Ref "SelectStage", name]

  MountPoint:
    Type: "AWS::EC2::VolumeAttachment"
    Condition: CreateProdResources
    Properties:
      InstanceId: !Ref EC2Instance
      VolumeId: !Ref NewVolume
      Device: /dev/sdh

  NewVolume:
    Type: "AWS::EC2::Volume"
    Condition: CreateProdResources
    Properties:
      Size: 100
      AvailabilityZone: !GetAtt EC2Instance.AvailabilityZone

  CreateS3Bucket:
    Type: AWS::S3::Bucket
    Properties:
        BucketName: !Ref S3BucketName


Outputs:
  EC2Instance:
    Value: !Ref 'EC2Instance'
    Description: 'EC2 instance create'

  BucketName:
    Value: !Ref 'CreateS3Bucket' 
    Description: Name of the Amazon S3 bucket