10-Mapping.yaml

# will be using mapping to map the parameters with our resources.

Parameters:
  EnvironmentName:
    Description: Environment Name
    Type: String
    AllowedValues: [development, production]
    ConstraintDescription: must be development or production

Resources:
  EC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      InstanceType:
        !FindInMap [
          EnvironmentToInstanceType,
          !Ref "EnvironmentName",
          instanceType,
        ]
      # Note we use the pseudo parameter AWS::Region
      ImageId: !FindInMap [AWSRegionArch2AMI, !Ref "AWS::Region", HVM64]

Mappings:
  AWSRegionArch2AMI:
    af-south-1:
      HVM64: ami-06db08e8636583118
    ap-east-1:
      HVM64: ami-0921e2da2f22f9617
    ap-northeast-1:
      HVM64: ami-06098fd00463352b6
    ap-northeast-2:
      HVM64: ami-07464b2b9929898f8
    ap-northeast-3:
      HVM64: ami-0b96303a469fa0678
    ap-south-1:
      HVM64: ami-0bcf5425cdc1d8a85
    ap-southeast-1:
      HVM64: ami-03ca998611da0fe12
    ap-southeast-2:
      HVM64: ami-06202e06492f46177
    ca-central-1:
      HVM64: ami-09934b230a2c41883
    eu-central-1:
      HVM64: ami-0db9040eb3ab74509
    eu-north-1:
      HVM64: ami-02baf2b4223a343e8
    eu-south-1:
      HVM64: ami-081e7f992eee19465
    eu-west-1:
      HVM64: ami-0ffea00000f287d30
    eu-west-2:
      HVM64: ami-0fbec3e0504ee1970
    eu-west-3:
      HVM64: ami-00dd995cb6f0a5219
    me-south-1:
      HVM64: ami-0502022ce8bfa56a9
    sa-east-1:
      HVM64: ami-0c27c96aaa148ba6d
    us-east-1:
      HVM64: ami-0742b4e673072066f
    us-east-2:
      HVM64: ami-05d72852800cbf29e
    us-west-1:
      HVM64: ami-0577b787189839998
    us-west-2:
      HVM64: ami-0518bb0e75d3619ca
  EnvironmentToInstanceType:
    development:
      instanceType: t2.micro
    # we want a bigger instance type in production
    production:
      instanceType: t2.small