Fix: GH-5 Hardcoded instance types

Author: gregn

LINUX/AS2-Automation-Linux-CloudFormation.yaml

@@ -23,6 +23,10 @@ Parameters:
     Type: String
     Description: Default Linux image to use when creating the AppStream 2.0 image builder instance. Input the name of your customized image with the embedded SSH key here. See blog documentation for instructions on creating this.
     Default: Linux_Automation_Base
+  AS2DefaultInstanceType:
+    Type: String
+    Description: The AppStream Instance type to use for the ImageBuilder
+    Default: 'stream.standard.medium'
   AS2DefaultSSHKeyARN:
     Type: String
     Description: ARN of the AWS Systems Manager parameter containing the SSH key embedded in your customized Linux image. See blog documentation for instructions on creating this. (arn:aws:ssm:us-east-2:123456789012:parameter/as2_automation/rsakey)  
@@ -434,9 +438,9 @@ Resources:
             Ref: ImageBuilderSecurityGroup           
           Default_Subnet : 
             Ref: AS2VPCSubnet1
-          Default_Type : stream.standard.medium
           Default_ImageBuilderSSHKeyARN :
             Ref: AS2DefaultSSHKeyARN
+          Default_Type : !Ref AS2DefaultInstanceType
       Runtime: python3.9
       Role: !GetAtt 'LambdaFunctionIAMRole.Arn'
       Timeout: 30

WINDOWS/AS2-Automation-Windows-CloudFormation.yaml

@@ -23,6 +23,10 @@ Parameters:
     Type: String
     Description: Default Windows image to use when creating the AppStream 2.0 image builder instance. For non-domain joined image builders, input your customized base image with the embedded startup script here. See blog documentation for instructions on creating this.
     Default: AppStream-WinServer2019-03-03-2022
+  AS2DefaultInstanceType:
+    Type: String
+    Description: The AppStream Instance type to use for the ImageBuilder
+    Default: 'stream.standard.medium'
   DefaultDomain:
     Type: String
     Description: Default Active Directory FQDN to join image builder instances to. This should already be setup within the AppStream 2.0 console. Leave blank or enter 'none' to not join a domain. (onprem.corp.int)
@@ -524,8 +528,8 @@ Resources:
             Ref: ImageBuilderSecurityGroup           
           Default_Subnet : 
             Ref: AS2VPCSubnet1
-          Default_Type : stream.standard.medium
           Default_S3_Bucket: !Ref WorkShopS3Bucket
+          Default_Type : !Ref AS2DefaultInstanceType
       Runtime: python3.9
       Role: !GetAtt 'LambdaFunctionIAMRole.Arn'
       Timeout: 30