如何在 localstack 上运行 AWS Lambda dotnet

编程问答 2022-05-22

问题描述

DotNet3.1 AWS Lambda

我使用 Amazon 模板使用 C# DotNet3.1 创建了一个 AWS Lambda 解决方案

dotnet new serverless.AspNetCoreWebAPI -n MyDotNet.Lambda.Service

这将创建一个 lambda 函数，其处理程序为 MyDotNet.Lambda.Service::MyDotNet.Lambda.Service.LambdaEntryPoint::FunctionHandlerAsync 加上一些 serverless.template 文件和 aws-lambda-tools-defaults.json

部署 DotNet3.1 AWS Lambda 的标准方法

部署它的标准方法是安装 Amazon.Lambda.Tools

dotnet tool update -g Amazon.Lambda.Tools

然后运行

dotnet lambda deploy-serverless --profile myawsprofile

请注意，配置文件是可选的，但我已经在该配置文件下配置了 AWS。 这将提示输入 CloudFormation 堆栈名称（例如：foo）和一个 S3 存储桶（例如：my-bucket） 并将其部署到自定义配置文件下配置的“真实”AWS myawsprofile

LocalStack 作为 docker 容器运行

到目前为止一切都很好。现在我刚刚发现 https://github.com/localstack/localstack 这是在本地运行 AWS 平台的好方法，所以我使用 docker-compose 文件 localstack-compose.yml 来启动容器

version: '3.8'

services:
  localstack:
    container_name: "${LOCALSTACK_DOCKER_NAME-localstack_main}"
    image: localstack/localstack-full
    network_mode: bridge
    ports:
      - "4566:4566"
      - "4571:4571"
      - "${PORT_WEB_UI-8080}:${PORT_WEB_UI-8080}"
    environment:
      - SERVICES=${SERVICES- }
      - DEBUG=${DEBUG- }
      - data_dir=${data_dir- }
      - PORT_WEB_UI=${PORT_WEB_UI- }
      - LAMBDA_EXECUTOR=${LAMBDA_EXECUTOR- }
      - KInesIS_ERROR_PROBABILITY=${KInesIS_ERROR_PROBABILITY- }
      - DOCKER_HOST=unix:///var/run/docker.sock
      - HOST_TMP_FOLDER=${TMPDIR}
    volumes:
      - "${TMPDIR:-/tmp/localstack}:/tmp/localstack"
      - "/var/run/docker.sock:/var/run/docker.sock"

像这样：

docker-compose -f localstack-compose.yml up

它运行在4566端口

AWS 本地

为了使用 LocalStack 运行 AWS CLI，我安装了包装器 https://github.com/localstack/awscli-local 以便我可以执行诸如

awslocal s3 ls

如何在本地部署 AWS Lambda？

我太新，无法理解我遵循的大部分教程。其中一些是指无服务器框架，但我只是使用 localstack 作为 docker 容器。我还安装了 SAM CLI，以备不时之需（虽然我还不明白是为了什么）

我尝试将其部署到本地堆栈

dotnet lambda deploy-serverless --profile default

这将是等效的，我想，但我明白

Error uploading to MyDotNet.Lambda.Service/AspNetCoreFunction-CodeUri-Or-ImageUri-637509113851513062-637509113886357582.zip in bucket foo: The bucket you are attempting to access must be addressed using the specified endpoint. Please send all future requests to this endpoint

虽然我有一个桶 s3://foo in localstack

要找到一个我可以用我的 AWS 基本知识水平来遵循的示例真的很复杂。 是否有我遗漏的任何说明，或者有关如何逐步实现我想要的内容的不错链接/教程？谢谢

更新 1 (11/3/2021) 我已经使用亚马逊模板 https://gitlab.com/sunnyatticsoftware/sandbox/localstack-sandbox/-/tree/master/02-lambda-dotnet-webapi

创建的 web api 项目逐步尝试

但我发现问题。

步骤： 首先我为 lambda 执行创建角色

awslocal iam create-role --role-name lambda-dotnet-webapi-ex --assume-role-policy-document file://trust-policy.json

将策略附加到角色以授予执行权限

awslocal iam attach-role-policy --role-name lambda-dotnet-webapi-ex --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

创建 Lambda 函数

awslocal lambda create-function --function-name lambda-dotnet-webapi-function --zip-file fileb://function.zip --handler Sample.Lambda.DotNet.WebApi::Sample.Lambda.DotNet.WebApi.LambdaEntryPoint::FunctionHandlerAsync --runtime dotnetcore3.1 --role arn:aws:iam::000000000000:role/lambda-dotnet-webapi-ex

使用 base64 实用程序调用 AWS Lambda 来解码日志

awslocal lambda invoke --function-name lambda-dotnet-webapi-function out --log-type Tail --query 'LogResult' --output text | base64 -d

它返回：

iptables v1.4.21: can't initialize iptables table `nat': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
[information] Microsoft.Hosting.Lifetime: Application started. Press Ctrl+C to shut down.
[information] Microsoft.Hosting.Lifetime: Hosting environment: Production
[information] Microsoft.Hosting.Lifetime: Content root path: /var/task
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Production
info: Microsoft.Hosting.Lifetime[0]
      Content root path: /var/task
START RequestId: a5eb1d2d-d908-15f6-ace3-d4d0e01a0066 Version: $LATEST
Could not load file or assembly 'system.io.pipelines,Version=4.0.2.1,Culture=neutral,PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.
: FileNotFoundException
   at Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction`2.FunctionHandlerAsync(TREQUEST request,ILambdaContext lambdaContext)
   at System.Runtime.CompilerServices.AsyncmethodBuilderCore.Start[TStateMachine](TStateMachine& stateMachine)
   at Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction`2.FunctionHandlerAsync(TREQUEST request,ILambdaContext lambdaContext)
   at lambda_method(Closure,Stream,LambdaContextInternal )


END RequestId: a5eb1d2d-d908-15f6-ace3-d4d0e01a0066
REPORT RequestId: a5eb1d2d-d908-15f6-ace3-d4d0e01a0066  Init Duration: 2305.87 ms       Duration: 33.29 ms      Billed Duration: 100 ms      Memory Size: 1536 MB    Max Memory Used: 0 MB
Starting daemons...
ImportError: No module named site

有人有一个可行的例子吗？

更新 2 有趣的是，我已经尝试过针对真正的 AWS（AWS 凭证中的不同配置文件），但我也遇到了错误，但情况有所不同。

创建角色

aws iam create-role --role-name lambda-dotnet-webapi-ex --assume-role-policy-document file://trust-policy.json --profile diegosasw

列出角色

aws iam list-roles --profile diegosasw

附加政策

aws iam attach-role-policy --role-name lambda-dotnet-webapi-ex
 --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole --profile diegosasw

创建 lambda

aws lambda create-function --function-name lambda-dotnet-webap
i-function --zip-file fileb://function.zip --handler Sample.Lambda.DotNet.WebApi::Sample.Lambda.DotNet.WebApi.LambdaEntryPoint::FunctionHa
ndlerAsync --runtime dotnetcore3.1 --role arn:aws:iam::308309238958:role/lambda-dotnet-webapi-ex --profile diegosasw

调用

aws lambda invoke --function-name lambda-dotnet-webapi-function --profile diegosasw out --log-type Tail --query 'LogResult' --output text | base64 -d

它回来了

START RequestId: 7d77489f-869b-4e4d-87a0-ac800d71eb2d Version: $LATEST
warn: Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction[0]
      Request does not contain domain name information but is derived from APIGatewayProxyFunction.
[Warning] Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction: Request does not contain domain name information but is derived from APIGatewayProxyFunction.
Object reference not set to an instance of an object.: NullReferenceException
   at Amazon.Lambda.AspNetCoreServer.APIGatewayProxyFunction.MarshallRequest(InvokeFeatures features,APIGatewayProxyRequest apiGatewayRequest,ILambdaContext lambdaContext)
   at Amazon.Lambda.AspNetCoreServer.AbstractAspNetCoreFunction`2.FunctionHandlerAsync(TREQUEST request,LambdaContextInternal )


END RequestId: 7d77489f-869b-4e4d-87a0-ac800d71eb2d
REPORT RequestId: 7d77489f-869b-4e4d-87a0-ac800d71eb2d  Duration: 755.06 ms     Billed Duration: 756 ms Memory Size: 128 MB     Max Memory Used: 87 MB    Init Duration: 462.09 ms

解决方法

我让它同时适用于 AWS 和 LocalStack（即：awslocal）。以下是仅使用 AWS CLI 的步骤。这是回购示例 https://gitlab.com/sunnyatticsoftware/sandbox/localstack-sandbox/-/tree/master/03-lambda-dotnet-empty

使用 AWS CLI 在本地堆栈中创建 AWS lambda

AWS

从 Amazon 模板创建空示例 C# lambda 函数

dotnet new lambda.EmptyFunction -n Sample.Lambda.DotNet

编译发布

dotnet build
dotnet publish -c Release -o publish

压缩 lambda 文件

cd publish
zip -r ../function.zip *

创建角色

aws --profile diegosasw iam create-role --role-name lambda-dotnet-ex --assume-role-policy-document '{"Version": "2012-10-17","Statement": [{ "Effect": "Allow","Principal": {"Service": "lambda.amazonaws.com"},"Action": "sts:AssumeRole"}]}'

将 AWSLambdaBasicExecutionRole 策略附加到角色

aws --profile diegosasw iam attach-role-policy --role-name lambda-dotnet-ex --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

创建 lambda

aws --profile diegosasw lambda create-function --function-name lambda-dotnet-function --zip-file fileb://function.zip --handler Sample.Lambda.DotNet::Sample.Lambda.DotNet.Function::FunctionHandler --runtime dotnetcore3.1 --role arn:aws:iam::308309238958:role/lambda-dotnet-ex

调用 lambda

aws --profile diegosasw lambda invoke --function-name lambda-dotnet-function --payload "\"Just Checking If Everything is OK\"" response.json --log-type Tail

本地堆栈

对于 localStack 是类似的，但是将 aws 替换为 awslocal，当然，我没有指定任何配置文件，但您可以使用 --profile default 或任何您拥有的 {{1} }} 在

创建角色

.aws/credentials

将 AWSLambdaBasicExecutionRole 策略附加到角色

awslocal iam create-role --role-name lambda-dotnet-ex --assume-role-policy-document '{"Version": "2012-10-17","Action": "sts:AssumeRole"}]}'

创建 lambda

awslocal iam attach-role-policy --role-name lambda-dotnet-ex --policy-arn arn:aws:iam::aws:policy/service-role/AWSLambdaBasicExecutionRole

在 localstack 中调用 lambda 并传递一个 json 负载（字符串是有效的 JSON）

awslocal lambda create-function --function-name lambda-dotnet-function --zip-file fileb://function.zip --handler Sample.Lambda.DotNet::Sample.Lambda.DotNet.Function::FunctionHandler --runtime dotnetcore3.1 --role arn:aws:iam::000000000000:role/lambda-dotnet-ex

查看功能

awslocal lambda invoke --function-name lambda-dotnet-function --payload "\"Just Checking If Everything is OK again\"" response.json --log-type Tail

删除函数

awslocal lambda list-functions

Dotnet 工具

使用 dotnet 工具，相当于

awslocal lambda delete-function --function-name lambda-dotnet-function
.net-core-3.1aws-cliaws-lambdadotnet-toollocalstack