CloudFormation-Lambda代码中的访问参数 [英] CloudFormation - Access Parameter from Lambda Code

问题描述

我有一个 CloudFormation 模板，看起来像这样：

I have a CloudFormation template that looks like this:

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "This template will deploy stuff",
    "Parameters":{
    "myParamToLambdaFunction" : {
        "Description" : "Please enter the the value",
        "Type" : "String",
        "ConstraintDescription" : "must have some value."
    }
},
"Resources": {
    "SecGrpValidatorFromCFTemplate": {
        "Type": "AWS::Lambda::Function",
        "Properties": {
            "FunctionName": "mylambdafunctionname",
            "Handler": "myfile.lambda_handler",
            "Role": {
                "Fn::GetAtt": ["somerole", "Arn"]
            },
            "Timeout": "30",
            "Runtime": "python2.7",
            "Code": {
                "S3Bucket":"mybucket",
                "S3Key":"mylambdafunction.zip"
            }
        }
    }
}

我需要将 myParamToLambdaFunction 的值传递给Lambda

I need to pass the value of myParamToLambdaFunction to the Lambda function.

有没有办法？

推荐答案

从> 18开始2016年11月，AWS Lambda现在支持环境变量，CloudFormation通过< a href = http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-lambda-function.html#cfn-lambda-function-environment rel = nofollow noreferrer> <$ c Environment 属性 rel = nofollow noreferrer> AWS :: Lambda :: Function 资源。

As of 18 Nov 2016, AWS Lambda now supports environment variables, which CloudFormation supports through the Environment property on the AWS::Lambda::Function resource.

添加资源中的环境属性，如下所示：

Add an Environment property to your resource like this:

{
    "AWSTemplateFormatVersion": "2010-09-09",
    "Description": "This template will deploy stuff",
    "Parameters":{
    "myParamToLambdaFunction" : {
        "Description" : "Please enter the the value",
        "Type" : "String",
        "ConstraintDescription" : "must have some value."
    }
},
"Resources": {
    "SecGrpValidatorFromCFTemplate": {
        "Type": "AWS::Lambda::Function",
        "Properties": {
            "FunctionName": "mylambdafunctionname",
            "Handler": "myfile.lambda_handler",
            "Role": {
                "Fn::GetAtt": ["somerole", "Arn"]
            },
            "Timeout": "30",
            "Runtime": "python2.7",
            "Code": {
                "S3Bucket":"mybucket",
                "S3Key":"mylambdafunction.zip"
            },
            "Environment": {
                "Variables": {
                    "myParam": {
                        "Ref": "myParamToLambdaFunction"
                    }
                }
            }
        }
    }
}

然后根据运行时平台从已部署的Lambda函数中引用环境变量orm（例如，Python中的 os.environ ['myParam'] ）。

Then reference the environment variable from your deployed Lambda function according to your runtime platform (e.g., os.environ['myParam'] in Python).

这篇关于CloudFormation-Lambda代码中的访问参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！