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如何将AssetCode添加到CfFunction类

aws-cdk aws-lambda python

Jasonca1 · 技术社区 · 3 年前

我希望能够创建一个CfFunction,但能够为 code 参数通常,使用更高级别 Function 构造由提供 aws_cdk.aws_lambda ,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,
        )

然而,当试图使用较低级别的CfFunction构造来实现这一点时,文档没有提供关于如何传入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,
        )

0 回复 | 直到 3 年前

kichik 3 年前

我不知道你为什么会选择使用 CfnFunction 结束 Function ,但您可以查看 source code 看看它有什么作用。它通过水桶和钥匙 code 绑定后。翻译成Python应该是这样的:

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,
    ),
)