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• Ever wonder on which platform Amazon AWS Lambda in C# is running?

  Tuesday, February 14, 2017

  c# AWS .net core

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  In last December, AWS announced C# support for AWS Lambda using .NET Core 1.0 runtime. Ever wonder on which platform is it running? I am curious too and I did not see it in any official documentation. So I decided to write a small AWS Lambda function to detect the platform:

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Threading.Tasks;
  using System.Runtime.InteropServices;
  using Amazon.Lambda.Core;
  using Amazon.Lambda.Serialization;
   
  // Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class.
  [assembly: LambdaSerializerAttribute(typeof(Amazon.Lambda.Serialization.Json.JsonSerializer))]
   
  namespace SysInfoLambda
  {
      public class Function
      {
   
          /// <summary>
          /// A simple function that takes a string and does a ToUpper
          /// </summary>
          /// <param name="input"></param>
          /// <param name="context"></param>
          /// <returns></returns>
          public RuntimeInfo FunctionHandler(ILambdaContext context)
          {
              return new RuntimeInfo()
              {
                  FrameworkDescription = RuntimeInformation.FrameworkDescription,
                  OSArchitecture = RuntimeInformation.OSArchitecture,
                  ProcessArchitecture = RuntimeInformation.ProcessArchitecture,
                  OSDescription = RuntimeInformation.OSDescription,
                  OSPlatform = RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? OS.Linux :
                      RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? OS.OSX : OS.Windows
              };
          }
   
      }
   
      public class RuntimeInfo
      {
          public string FrameworkDescription { get; set; }
          public Architecture OSArchitecture { get; set; }
          public string OSDescription { get; set; }
          public Architecture ProcessArchitecture { get; set; }
          public OS OSPlatform { get; set; }
      }
   
      public enum OS
      {
          Linux,
          OSX,
          Windows
      }
   
  }
  

  The result? The AWS C# Lambda runs in 64 bit Linux. The extract OS description is: Linux 4.4.35-33.55.amzn1.x86_64 #1 SMP Tue Dec 6 20:30:04 UTC 2016.