"Method overloads are not supported. There are multiple methods with the name." 当 运行 Azure Functions 在 Docker 时

Question

我用这个 Dockerfile

对 Docker 执行了一个非常简单的函数应用程序

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;

namespace fapp1
{
    public static class HttpIngress
    {
        [FunctionName("Health")]
        public static IActionResult Health([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "health")] HttpRequest req) => new OkObjectResult("OK");

        [FunctionName("HttpIngress")]
        [return: ServiceBus("%queuename%", Connection = "servicebusconnection")]
        public static async Task<string> Run(
            [HttpTrigger(AuthorizationLevel.Anonymous, "post")] HttpRequest req)
            => await new StreamReader(req.Body).ReadToEndAsync();
    }
}

FROM mcr.microsoft.com/dotnet/sdk:6.0 AS installer-env

# Build requires 3.1 SDK
COPY --from=mcr.microsoft.com/dotnet/core/sdk:3.1 /usr/share/dotnet /usr/share/dotnet

COPY . /src/dotnet-function-app
RUN cd /src/dotnet-function-app && \
    mkdir -p /home/site/wwwroot && \
    dotnet publish *.csproj --output /home/site/wwwroot

# To enable ssh & remote debugging on app service change the base image to the one below
# FROM mcr.microsoft.com/azure-functions/dotnet:4-appservice
FROM mcr.microsoft.com/azure-functions/dotnet:4
ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true

COPY --from=installer-env ["/home/site/wwwroot", "/home/site/wwwroot"]

docker run -it --env-file docker.env test

对于 HttpIngress 中的两个函数，我收到此错误：

fail: Host.Startup[0]
      Error indexing method 'Health'
      Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexingException: Error indexing method 'Health'
       ---> System.InvalidOperationException: Method overloads are not supported. There are multiple methods with the name 'fapp1.HttpIngress.Health'.
         at Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndex.Add(IFunctionDefinition function, FunctionDescriptor descriptor, MethodInfo method) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndex.cs:line 30
         at Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsyncCore(MethodInfo method, IFunctionIndexCollector index, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs:line 349
         at Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsync(MethodInfo method, IFunctionIndexCollector index, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs:line 149
         --- End of inner exception stack trace ---
         at Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexMethodAsync(MethodInfo method, IFunctionIndexCollector index, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs:line 157
         at Microsoft.Azure.WebJobs.Host.Indexers.FunctionIndexer.IndexTypeAsync(Type type, IFunctionIndexCollector index, CancellationToken cancellationToken) in C:\projects\azure-webjobs-sdk-rqm4t\src\Microsoft.Azure.WebJobs.Host\Indexers\FunctionIndexer.cs:line 85
fail: Function.Health[0]
      Microsoft.Azure.WebJobs.Host: Error indexing method 'Health'. Microsoft.Azure.WebJobs.Host: Method overloads are not supported. There are multiple methods with the name 'fapp1.HttpIngress.Health'.
warn: Host.Startup[0]
      Function 'Health' failed indexing and will be disabled.

我试过了

• 从 static class 和方法更改为实例：无效
• 将每个 Function/method 放入单独的 classes 中：这行得通，但这可能只是一个 解决方法
• 在 4.0.1（默认设置为 func init --worker-runtime dotnet --docker --language c#）和当前 4.1.0 之间切换 Microsoft.NET.Sdk.Functions：无效

我现在 运行 在容器中运行多年，但现在无法弄清楚我错过了什么。

Answer 1

我发现了你的问题，因为我遇到了同样的问题。可能与此有关：

https://github.com/Azure/azure-functions-host/issues/8244

根据 link 中的信息，我更改了 dockerfile 以将此图像用于 azure 函数：

FROM mcr.microsoft.com/azure-functions/dotnet:4.1.3-slim 

这对我有用