如何将 AssetCode 添加到 CfnFunction class

Question

我希望能够创建一个 CfnFunction，但能够为 code 参数传入一个 AssetCode class。通常，使用 aws_cdk.aws_lambda 提供的更高级别 Function 构造，这就足够了：

class MyFunction(Stack):
    def __init__(self, scope, id, **kwargs):
        super().__init__(scope, id, **kwargs)

        self._python_function = Function(
            self,
            id="PythonFunction",
            runtime=Runtime.PYTHON_3_9,
            handler="app.main.lambda_handler",
            timeout=Duration.minutes(3),
            code=Code.from_asset(
                path="/path/to/my/function",
                bundling=BundlingOptions(
                    image=Runtime.PYTHON_3_9.bundling_image,
                    command=[
                        "bash",
                        "-c",
                        "pip install -r requirements.txt -t /asset-output && cp -au . /asset-output",
                    ],
                ),
            ),
            memory_size=128,
            log_retention=RetentionDays.TWO_WEEKS,
        )

但是，当尝试使用较低级别的 CfnFunction 构造执行此操作时，文档未提供有关如何传入 AssetCode 类型的明确示例：

class MyFunctionWrapper(Stack):

    def __init__(
            self,
            scope,
            id,
            **kwargs,

    ):
        super().__init__(scope, id, **kwargs)

        code_asset: AssetCode = Code.from_asset(
            path="path/to/my/code",
            bundling=BundlingOptions(
                image=Runtime.PYTHON_3_9.bundling_image,
                command=[
                    "bash",
                    "-c",
                    "pip install -r requirements.txt -t /asset-output && cp -au . /asset-output",
                ],
            ),
        )

        self._role = Role(
            self,
            id=f"{id}FunctionRole",
            managed_policies=[
                ManagedPolicy.from_managed_policy_arn(
                    self,
                    id="PolicyArn",
                    managed_policy_arn="arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole",
                )
            ],
            assumed_by=ServicePrincipal("lambda.amazonaws.com"),
        )

        self._function = CfnFunction(
            self,
            id="Function",
            runtime="PYTHON_3_9",
            handler="app.handler",
            timeout=60,
            memory_size=128,
            role=self._role.role_name,
            code=code_asset,  # <- This is incorrect type for CfnFunction
        )

        self._log_group = LogGroup(
            self,
            id=f"{id}LogGroup",
            log_group_name=f"/aws/lambda/{self._function.function_name}",
            retention=RetentionDays.FIVE_DAYS,
        )

Answer 1

我不确定您为什么会选择使用 CfnFunction 而不是 Function，但是您可以查看 source code 并了解它的作用。它在绑定后通过 code 传递桶和密钥。翻译成 Python 它应该看起来像：

bound_code = code_asset.bind(self)

self._function = CfnFunction(
    self,
    id="Function",
    runtime="PYTHON_3_9",
    handler="app.handler",
    timeout=60,
    memory_size=128,
    role=self._role.role_name,
    code=CfnFunction.CodeProperty(
        s3_bucket=bound_code.s3_location.bucket_name,
        s3_key=bound_code.s3_location.object_key,
        s3_object_version=bound_code.s3_location.object_version,
    ),
)

如何将 AssetCode 添加到 CfnFunction class

How to add AssetCode to to a CfnFunction class

python

aws-lambda

aws-cdk