Docker 出现错误“无法计算缓存密钥：未找到” - 在 Visual Studio 中运行正常

我使用 Visual Studio 生成了一个 Dockerfile。它在 Visual Studio 中运行得很好，现在我正在尝试从 Windows 本身构建它（docker build .，并且我尝试了很多组合）。但我收到以下错误：

> [build 3/7] COPY [client/client.csproj, client/]:
------
failed to compute cache key: "/client/client.csproj" not found: not found

当我将副本更改为./client.csproj它确实继续，然后我得到：

 => ERROR [build 7/7] RUN dotnet build "client.csproj" -c Release -o /app/build                3.3s
------
> [build 7/7] RUN dotnet build "client.csproj" -c Release -o /app/build:
#15 0.652 Microsoft (R) Build Engine version 16.8.3+39993d9d for .NET
#15 0.652 Copyright (C) Microsoft Corporation. All rights reserved.
#15 0.652
#15 1.169   Determining projects to restore...
#15 1.483   All projects are up-to-date for restore.
#15 3.231 CSC : error CS5001: Program does not contain a static 'Main' method suitable for an entry point [/src/client/client.csproj]
#15 3.240
#15 3.240 Build FAILED.
#15 3.240
#15 3.240 CSC : error CS5001: Program does not contain a static 'Main' method suitable for an entry point [/src/client/client.csproj]
#15 3.240     0 Warning (5)
#15 3.240     1 Error (5)
#15 3.240
#15 3.240 Time Elapsed 00:00:02.51
-----
executor failed running [/bin/sh -c dotnet build "client.csproj" -c Release -o /app/build]: exit code: 1

我究竟做错了什么？我把 Docker Linux 改成了 Windows，改了WSL，并重新启动一切。

#See https://aka.ms/containerfastmode to understand how Visua...

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0-buster-slim AS build
WORKDIR /src
COPY ["client/client.csproj", "client/"]
RUN dotnet restore "client/client.csproj"
COPY . .
WORKDIR "/src/client"
RUN dotnet build "client.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "client.csproj" -c Release -o /app/publish

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet', "client.dll"]

检查你的.dockerignore文件。它可能会忽略复制命令所需的文件，并且您会出现无法计算缓存密钥错误。

.dockerignore为了性能和安全性，可以配置为最小化发送到 docker 的文件：

* 
!dist/

第一行*禁止所有文件。第二行!dist/允许dist folder

这可能会导致意外行为：

FROM nginx:latest

# Fails because of * in .dockerignore
# failed to compute cache key: "/nginx.conf.spa" not found: not found
# Fix by adding `!nginx.conf.spa`  to .dockerignore
COPY nginx.conf.spa /etc/nginx/nginx.conf

RUN mkdir /app

# Works because of !dist/ in .dockerignore
COPY dist/spa /app

腰带和吊带。