mongodb-atlas-deployment.json

{
    "typeName": "MongoDB::Atlas::Deployment",
    "description": "An example resource schema demonstrating some basic constructs and validation rules.",
    "sourceUrl": "https://github.com/aws-cloudformation/aws-cloudformation-rpdk.git",
    "definitions": {
        "ApiKey": {
            "type": "object",
            "$comment": "A valid MongoDB Cloud API Key",
            "properties": {
                "PublicKey": {
                    "type": "string"
                },
                "PrivateKey": {
                    "type": "string"
                }
            },
            "required": [
                "PublicKey",
                "PrivateKey"
            ],
            "additionalProperties": false
        },
        "Project": {
            "type": "object",
            "$comment": "A MongoDB Atlas Project",
            "properties": {
                "Name": { "type" : "string" },
                "Id": { "type" : "string" },
                "OrgId": { "type" : "string" }
            },
            "required": [
                "Name"
            ],
            "additionalProperties": false
        },
        "Cluster": {
            "type": "object",
            "$comment": "A MongoDB Atlas Cluster",
            "properties": {
                "MongoDBMajorVersion": { 
                    "type" : "string",
                    "enum" : ["4.4", "4.2"]
                },  
                "InstanceSize": {
                    "type": "string",
                    "enum" : ["M10", "M20", "M30" ]
                },
                "RegionName": {
                    "type": "string"
                }
            },
            "required": [
            ],
            "additionalProperties": false
        },
        "AccessListEntry": {
            "type": "object",
            "$comment": "A MongoDB Atlas Project",
            "properties": {
                "Comment": { "type" : "string" },
                "IPAddress": { "type" : "string" },
                "CIDRBlock": { "type" : "string" },
                "AWSSecurityGroup": { "type" : "string" }
            },
            "required": [
            ],
            "additionalProperties": false
        },
        "DatabaseRole": {
            "type": "object",
            "$comment": "A MongoDB Atlas Database Role",
            "properties": {
                "RoleName": { "type" : "string" },
                "DatabaseName": { "type" : "string" }
            },
            "required": [
            ],
            "additionalProperties": false
        },
        "DatabaseUser": {
            "type": "object",
            "$comment": "A MongoDB Atlas Project",
            "properties": {
                "Username": { "type" : "string" },
                "Password": { "type" : "string" },
                "DatabaseName": { "type" : "string" },
                "AWSIAMType": { "type" : "string" },
                "Roles": { "type" : "array", "items" : { "$ref" : "#/definitions/DatabaseRole" } }
            },
            "required": [
            ],
            "additionalProperties": false
        },
        "InterfaceEndpoint": {
            "type": "object",
            "$comment": "A MongoDB Atlas Private Endpoint Interface Endpoint",
            "properties": {
                "EndpointServiceName": { "type": "string" },
                "DeleteRequested": { "type": "boolean" },
                "ConnectionStatus": { "type": "string" },
                "ErrorMessage": { "type": "string" },
                "InterfaceEndpointId":{ "type": "string" }
 
            },
            "required": [
            ],
            "additionalProperties": false
        },
        "PrivateEndpoint": {
            "type": "object",
            "$comment": "A MongoDB Atlas Private Endpoint",
            "properties": {
                "EndpointServiceName": { "type": "string" },
                "Id": { "type": "string" },
                "Status": { "type": "string" },
                "ErrorMessage": { "type": "string" },
                "InterfaceEndpoints": { "type": "array", "items" : { "$ref" : "#/definitions/InterfaceEndpoint" } }
            },
            "required": [
            ],
            "additionalProperties": false
        }
    },
    "properties": {
        "Name": {
            "description": "The name for the MongoDB Atlas Deployment (Project, Cluster, +).",
            "type": "string",
            "minLength": 5,
            "maxLength": 30
        },
        "ApiKey": {
            "$ref": "#/definitions/ApiKey"
        },
        "Project": {
            "$ref": "#/definitions/Project"
        },
        "Cluster": {
            "$ref": "#/definitions/Cluster"
        },
        "DatabaseUsers": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/DatabaseUser"
            }
        },
        "AccessList": {
            "type": "array",
            "items": {
                "$ref": "#/definitions/AccessListEntry"
            }
        },
        "PrivateEndpoint": {
            "$ref": "#/definitions/PrivateEndpoint"
        }
    },
    "additionalProperties": false,
    "required": [
        "Name",
        "ApiKey",
        "Project",
        "Cluster"
    ],
    "readOnlyProperties": [
        "/properties/Project.Id",
        "/properties/PrivateEndpoint"
    ],
    "primaryIdentifier": [
        "/properties/Project.Id"
    ],
    "handlers": {
        "create": {
            "permissions": [
                "mongodb-atlas:CreateAtlasDeployment"
            ]
        },
        "read": {
            "permissions": [
                "mongodb-atlas:DescribeAtlasDeployment"
            ]
        },
        "update": {
            "permissions": [
                "mongodb-atlas:UpdateAtlasDeployment"
            ]
        },
        "delete": {
            "permissions": [
                "mongodb-atlas:DeleteAtlasDeployment"
            ]
        },
        "list": {
            "permissions": [
                "mongodb-atlas:ListAtlasDeployments"
            ]
        }
    }
}

This is the idea for a single custom resource called an "Atlas Deployment" which basically has more loosely but yet well-defined types. Pushing the details of each Atlas resource into the subtypes for this one custom resource. Then we just have 1 lambda handler to take care of everything.
But I cannot get this schema file or not even cfn init cfn test to work out of box for the go plugin, can you try to?