docker - 加载 native 库时出错“/app/runtimes/linux/native/libgrpc_csharp_ext.x64.so - Grpc Core on Docker 容器

Question

我正在为 Csharp 使用 .NET 核心和 gRPC 构建一个 Web API 应用程序。
在本地，它工作得很好，但是当我构建容器并在 Docker 桌面上运行它时，当我调用方法时收到错误:

System.IO.IOException: Error loading native library "/app/runtimes/linux/native/libgrpc_csharp_ext.x64.so". Error loading shared library ld-linux-x86-64.so.2: No such file or directory (needed by /app/runtimes/linux/native/libgrpc_csharp_ext.x64.so)
   at Grpc.Core.Internal.UnmanagedLibrary..ctor(String[] libraryPathAlternatives)
   at Grpc.Core.Internal.NativeExtension.LoadUnmanagedLibrary()
   at Grpc.Core.Internal.NativeExtension.LoadNativeMethods()
   at Grpc.Core.Internal.NativeExtension..ctor()
   at Grpc.Core.Internal.NativeExtension.Get()
   at Grpc.Core.Internal.NativeMethods.Get()
   at Grpc.Core.GrpcEnvironment.GrpcNativeInit()
   at Grpc.Core.GrpcEnvironment..ctor()
   at Grpc.Core.GrpcEnvironment.AddRef()
   at Grpc.Core.Channel..ctor(String target, ChannelCredentials credentials, IEnumerable`1 options)
   at Net.Core.Grpc.IPEndpointStrategy.SetCallInvokers(String serviceName, Boolean filterBlack)
   at Net.Core.Grpc.IPEndpointStrategy.Get(String serviceName)
   at Net.Core.Grpc.ClientCallInvoker.Call[TResponse](Func`2 call, Int32 retryLeft)
   at Net.Core.Grpc.ClientCallInvoker.AsyncUnaryCall[TRequest,TResponse](Method`2 method, String host, CallOptions options, TRequest request)
   at Grpc.Core.Interceptors.InterceptingCallInvoker.<AsyncUnaryCall>b__4_0[TRequest,TResponse](TRequest req, ClientInterceptorContext`2 ctx)
   at Grpc.Core.ClientBase.ClientBaseConfiguration.ClientBaseConfigurationInterceptor.AsyncUnaryCall[TRequest,TResponse](TRequest request, ClientInterceptorContext`2 context, AsyncUnaryCallContinuation`2 continuation)
   at Grpc.Core.Interceptors.InterceptingCallInvoker.AsyncUnaryCall[TRequest,TResponse](Method`2 method, String host, CallOptions options, TRequest request)
   at INRES.Service.Category.GetAllDvhcService.GetAllDvhcServiceClient.GetAllDvhcAsync(GetAllDvhcRequest request, CallOptions options)
   at INRES.Service.Category.GetAllDvhcService.GetAllDvhcServiceClient.GetAllDvhcAsync(GetAllDvhcRequest request, Metadata headers, Nullable`1 deadline, CancellationToken cancellationToken)
   at iNRES.Service.Meteorology.Domain.QueryHandlers.TramkttvQueryHandler.Handle(GetTramkttvQuery request, CancellationToken cancellationToken) in /app/src/iNRES.Service.Meteorology/Domain/QueryHandlers/TramkttvQueryHandler.cs:line 66
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestExceptionActionProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPostProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at MediatR.Pipeline.RequestPreProcessorBehavior`2.Handle(TRequest request, CancellationToken cancellationToken, RequestHandlerDelegate`1 next)
   at iNRES.Service.Meteorology.Controllers.BaseController.QueryAsync[TResult](IRequest`1 query) in /app/src/iNRES.Service.Meteorology/Controllers/BaseController.cs:line 45
   at iNRES.Service.Meteorology.Controllers.MtTramkttvController.GetById(Int32 id) in /app/src/iNRES.Service.Meteorology/Controllers/MtTramkttvController.cs:line 39
   at 

这是我的 Docker 文件:

FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine AS build
WORKDIR /app
ARG sln=myproject.sln
ARG service=src/myproject
ARG configuration=Release
COPY ${sln} ./
COPY ./${service} ./${service}/
COPY ./${tests} ./${tests}/
RUN apk update && apk add libc6-compat
RUN dotnet restore /property:Configuration=${configuration}
COPY . ./
RUN dotnet publish ${service} -c ${configuration} -o out
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-alpine as runtime
RUN echo 'http://dl-cdn.alpinelinux.org/alpine/v3.8/main' >> /etc/apk/repositories && apk update --no-cache && apk add --no-cache bash libc6-compat=1.1.19-r11
WORKDIR /app
COPY --from=build /app/${service}/${configuration}/out .
ENV ASPNETCORE_URLS http://*:5000
ENV ASPNETCORE_ENVIRONMENT docker
EXPOSE 5000
ENTRYPOINT dotnet myproject.dll

Answer 1

对于那些在 Raspberry Pi 上遇到此错误的人，问题是 libgrpc_csharp_ext native 库当前没有为 arm7 处理器编译和构建。我通过自己使用 this 为 arm7 编译 gRPC 使其工作。方法。现在一切都按预期工作。
您还可以在此处找到有关此问题的博客:
https://dev.to/erikest/grpc-on-dotnet-core-preview3-on-raspberrypi-3-4nf4