自定义资源的Lambda函数问题:没有名为cfnresponse的模块

时间:2018-02-14 21:25:42

标签: amazon-web-services lambda aws-lambda amazon-cloudformation

我正在尝试使用Lambda函数创建CloudFormation自定义资源。这是我的功能:

    "SubnetToVpcFunction": {
        "Type": "AWS::Lambda::Function",
        "Properties": {
            "Code": {
                "ZipFile" : { "Fn::Join" : ["\n", [
                    "import cfnresponse",
                    "import json, boto3 ",
                    "def handler(event, context): ",
                    "   ec2 = boto3.resource('ec2') ",
                    "   subnet = ec2.Subnet(event['ResourceProperties']['Subnet']) ",
                    "   vpc_id = subnet.vpc_id ",
                    "   responsedata = { 'VPCID' : vpc_id } ",
                    "   cfnresponse.send(event, context, cfnresponse.SUCCESS, responseData, \"CustomResourcePhysicalID\") "
                ] ] }
            },
            "Handler": "index.handler",
            "Runtime": "python2.7",
            "Timeout": "30",
            "Role": { "Fn::Join" : [ "", [ "arn:aws:iam::", { "Ref" : "AWS::AccountId" }, ":role/", { "Fn::FindInMap" : [ "AccountMapping", { "Ref" : "AWS::AccountId" }, "Role" ] } ] ] },
        }
    }

当我尝试将此函数用于另一个模板中的自定义资源时,自定义资源无法稳定,我在该功能的CloudWatch日志中看到此错误:

Unable to import module 'index': No module named cfnresponse

根据AWS文档here,当使用cfnresponse属性内联指定功能代码时,ZipFile python包可用于导入Lambda函数。那么为什么不能加载包呢?

1 个答案:

答案 0 :(得分:1)

我确实使用terraform来部署lambda函数,并且必须自己嵌入模块。要么使用pip和virtualenv从https://pypi.python.org/pypi/cfn-response获取它,要么使用附加到您提到的AWS文档的文件。

文档建议,如果你使用cloudformation 内联代码(如ZipFile),但我没有测试它。