dockerfile 构建失败

Question

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1 AS base
WORKDIR /app
EXPOSE 8000
EXPOSE 80

FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS build
WORKDIR /src
COPY ["Crontab/Crontab.csproj", "Crontab/"]
COPY ["CrontabService/CrontabService.csproj", "CrontabService/"]
COPY ["Common/Common.csproj", "Common/"]
RUN dotnet restore "Crontab/Crontab.csproj"
COPY . .
WORKDIR "/src/Crontab"
RUN dotnet build "Crontab.csproj" -c Release -o /app/build

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

FROM base AS final
WORKDIR /app
COPY *.* ./
ENTRYPOINT ["dotnet", "Crontab.dll"]

以上是我的dockerfile文件
失败原因如下

Step 7/19 : COPY ["./Crontab/Crontab.csproj", "Crontab/"]
COPY failed: stat /var/lib/docker/tmp/docker-builder806754089/Crontab/Crontab.csproj: no such file or directory

如果放在和目录同级问题是

Step 7/19 : COPY ["Crontab/Crontab.csproj", "/src"]
COPY failed: Forbidden path outside the build context: Crontab/Crontab.csproj ()

此时我将dockerfile挪到上一个文件夹也是失败，

Answer 1

这种情况一般说来是因为大小写问题造成的，Windows 的文件和文件夹是大小写无关，而Linux不是。
Crontab/Crontab.csproj 看看是不是第一个字母小写了。

Answer 2

试试 COPY ["src/Crontab/Crontab.csproj", "Crontab/"]