如何访问Lambda环境变量？

Question

运行.net核心2.1 AWS Lambda函数时,使用以下命令从c#中的AWS Lambda控制台获取环境变量很简单:

var envVariable = Environment.GetEnvironmentVariable("myVariableName");

但是,在AWS Lambda上运行ASP.NET核心2.1作为无服务器应用程序时,这不起作用(上面返回null).

我可以在launchSettings.json文件中设置本地 env变量,但我想使用AWS Lambda控制台中的Env变量.

如何在ASP.NET Core 2.1中访问AWS Lambda Env变量？

Answer 1

如何在ASP.NET Core 2.1中访问AWS Lambda Env变量

您可以像以前一样访问它.

var envVariable = Environment.GetEnvironmentVariable("myVariableName");

确保为相应资源设置环境变量,以便在调用时可用.

每个资源在serverless.template文件中都有一个条目,该文件是用于部署函数的AWS CloudFormation模板.

环境变量条目Resources:{ResourceName}:Properties:Environment:Variables位于文件中的JSON路径下.

示例声明

{
  "AWSTemplateFormatVersion" : "2010-09-09",
  "Transform" : "AWS::Serverless-2016-10-31",
  "Description" : "An AWS Serverless Application that uses the ASP.NET Core framework running in Amazon Lambda.",
  "Parameters" : {
  },
  "Conditions" : {
  },
  "Resources" : {
    "Get" : {
      "Type" : "AWS::Serverless::Function",
      "Properties": {
        "Handler": "TimeZoneService::TimeZoneService.LambdaEntryPoint::FunctionHandlerAsync",
        "Runtime": "dotnetcore1.0",
        "CodeUri": "",
        "MemorySize": 256,
        "Timeout": 60,
        "Role": null,
        "Policies": [ "AWSLambdaFullAccess" ],
        "Environment" : {
          "Variables" : {
            "myVariableName" : "my environment variable value"
          }
        },
        "Events": {
          "PutResource": {
            "Type": "Api",
            "Properties": {
              "Path": "/{proxy+}",
              "Method": "ANY"
            }
          }
        }
      }
    }
  },
  "Outputs" : {
  }
}

参考使用AWS Lambda构建和测试无服务器应用程序

参考使用ASP.NET Core,AWS Lambda和AWS API Gateway创建无服务器应用程序