BlockDeviceMappingProperty Under Condition_If

[davidurias]

When using If to deploy or not Secondary EBS Devices, those secondary devices in the AWS CFN Template are created with the first letter as lowercase and must be Uppercase as required by CFN,

Python.
Create an ec2.CfnInstance resource.

Set conditionals under the block_device_mapping as follow:

block_device_mappings=[
                ec2.CfnInstance.BlockDeviceMappingProperty(
                    device_name="/dev/sda1",
                    ebs=ec2.CfnInstance.EbsProperty(
                        volume_type="gp3",
                        volume_size=Param_Ebs_Root.value_as_number,
                        delete_on_termination=True,
                        encrypted=True
                    )
                ),
                Fn.condition_if(If_2nd_ebs.logical_id,
                                value_if_true=ec2.CfnInstance.BlockDeviceMappingProperty(
                                                device_name="xvdf",
                                                ebs=ec2.CfnInstance.EbsProperty(
                                                    volume_type="gp3",
                                                    volume_size=Param_Ebs_Root.value_as_number,
                                                    delete_on_termination=True,
                                                    encrypted=True
                                                )
                                            ),
                                value_if_false=Aws.NO_VALUE
                                )
                ,
                Fn.condition_if(If_3rd_ebs.logical_id,
                                value_if_true=ec2.CfnInstance.BlockDeviceMappingProperty(
                                    device_name="xvdg",
                                    ebs=ec2.CfnInstance.EbsProperty(
                                        volume_type="gp3",
                                        volume_size=Param_Ebs_3rd.value_as_number,
                                        delete_on_termination=True,
                                        encrypted=True
                                    )
                                ),
                                value_if_false=Aws.NO_VALUE
                                )
                ,
            ],

Do a syntethsize and you will get the following result:

"BlockDeviceMappings": [
          {
            "DeviceName": "/dev/sda1",
            "Ebs": {
              "DeleteOnTermination": true,
              "Encrypted": true,
              "VolumeSize": {
                "Ref": "ParamEbsRoot"
              },
              "VolumeType": "gp3"
            }
          },
          {
            "Fn::If": [
              "If2ndEbs",
              {
                "deviceName": "xvdf",
                "ebs": {
                  "deleteOnTermination": true,
                  "encrypted": true,
                  "volumeSize": {
                    "Ref": "ParamEbsRoot"
                  },
                  "volumeType": "gp3"
                }
              },
              {
                "Ref": "AWS::NoValue"
              }
            ]
          },
          {
            "Fn::If": [
              "If3rdEbs",
              {
                "deviceName": "xvdg",
                "ebs": {
                  "deleteOnTermination": true,
                  "encrypted": true,
                  "volumeSize": {
                    "Ref": "ParamEbs3rd"
                  },
                  "volumeType": "gp3"
                }
              },
              {
                "Ref": "AWS::NoValue"
              }
            ]
          }
        ]

Which is not correct,

Regards,

Environment

• **CDK CLI Version : 1.118.0
• **Node.js Version: 7.19.1
• **OS : Mac Os 11.4
• **Language (Version): Python 3.9

[peterwoodworth]

Sorry for the long response time here, and thank you for reporting this issue

This issue is documented, so I'm going to close this in favor of #8396. Please see that thread for more information and some workarounds.

[peterwoodworth]

Sorry for the long response time here, and thank you for reporting this issue

This issue is documented, so I'm going to close this in favor of #8396. Please see that thread for more information and some workarounds.

[github-actions]

⚠️COMMENT VISIBILITY WARNING⚠️

Comments on closed issues are hard for our team to see.
If you need more assistance, please either tag a team member or open a new issue that references this one.
If you wish to keep having a conversation with other community members under this issue feel free to do so.