CFT Template error: unresolved condition dependency UseDBSnapshot in Fn::If

Question

正在尝试为 RDS 创建一个可以处理这两种情况的 CFT 创建一个新的 RDS Aurora MySQL 集群和使用现有数据库集群快照创建 RDS 集群

这是我试过的，

我已经提供了模板的以下条件部分

"UseDbSnapshot" : {
              "Fn::Not" : [
                  {
                      "Fn::Equals":[
                            {"Ref": "DBSnapshotName"},
                            ""
                        ]
                    }
                ]
            }

并在资源部分引用如下

"RDSCluster1": {
        "Type": "AWS::RDS::DBCluster",
        "Condition": "isResourceCreate",
        "Properties": {
            "Engine": "aurora",
            "DBSubnetGroupName": {
                "Ref": "DBSubnetGroup"
            },
            "DBClusterParameterGroupName": {
                "Ref": "RDSDBClusterParameterGroup"
            },
            "DBSnapshotIdentifier" : {
                "Fn::If" : [
                  "UseDBSnapshot",
                  {"Ref" : "DBSnapshotName"},
                  {"Ref" : "AWS::NoValue"}
                ]
              },
            "MasterUsername": {
                "Ref": "DbUser"
            },
            "MasterUserPassword": {
                "Ref": "MasterUserPassword"
            },
            "StorageEncrypted" : true,
            "KmsKeyId" : {
                "Ref": "KmsKeyId"
            },
            "VpcSecurityGroupIds": [
                {
                    "Fn::GetAtt": [
                        "DBAccessSecurityGroup",
                        "GroupId"
                    ]
                }
            ],
            "Port": "3306",
            "BackupRetentionPeriod": "1"
        },
        "DeletionPolicy": "Snapshot"
    }

满足“isResourceCreate”条件，但出现以下错误

模板错误：未解决的条件依赖 UseDBSnapshot in Fn::If

你能帮我一下吗？

网上查过linkhttps://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/conditions-sample-templates.html 并创建了这个 CFT。

如果您需要更多详细信息，请告诉我。

Answer 1

如果您从快照恢复数据库，您不能提供MasterUsername和MasterUserPassword。这些值将来自快照 inherited，因此您必须将它们设为可选。

If you specify the SourceDBInstanceIdentifier or DBSnapshotIdentifier property, don't specify this property. The value is inherited from the source DB instance or snapshot.

CFT Template error: unresolved condition dependency UseDBSnapshot in Fn::If

CFT Template error: unresolved condition dependency UseDBSnapshot in Fn::If

json

amazon-web-services

amazon-rds

amazon-cloudformation