Visual生成的Dockerfile奇怪路径

Question

我正在使用Jason的清洁建筑模板，我想知道为什么他的WebUI Dockerfile是由Visual生成的，如下所示。

它将WORKDIR设置为/src，然后从/src/ProjectDir/Project.csproj复制每个项目。在这种情况下，WORKDIR有什么意义？看看WORKDIR "/src/src/WebUI"。为什么是/src/src？只有一个src目录。

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FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS base
ENV ASPNETCORE_URLS=https://+:5001;http://+:5000
WORKDIR /app
EXPOSE 5000
EXPOSE 5001

FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
RUN curl -sL https://deb.nodesource.com/setup_12.x | bash -
RUN apt install -y nodejs
WORKDIR /src
COPY ["src/WebUI/WebUI.csproj", "src/WebUI/"]
COPY ["src/Application/Application.csproj", "src/Application/"]
COPY ["src/Domain/Domain.csproj", "src/Domain/"]
COPY ["src/Infrastructure/Infrastructure.csproj", "src/Infrastructure/"]
RUN dotnet restore "src/WebUI/WebUI.csproj"
COPY . .
WORKDIR "/src/src/WebUI"
RUN dotnet build "WebUI.csproj" -c Release -o /app/build

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

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

Answer 1

我怀疑这是因为WORKDIR /src将创建一个名为/src的目录，并将目录转换为它。在更改到它之后，它将从主机的相对src文件夹复制文件，并复制到另一个名为src的子目录中(在容器上)。因此，整个绝对路径变为/src/src。您可以通过在RUN pwd && ls之前和第一个COPY之后添加COPY来确认这一点。

FROM mcr.microsoft.com/dotnet/aspnet:5.0 AS base
ENV ASPNETCORE_URLS=https://+:5001;http://+:5000
WORKDIR /app
EXPOSE 5000
EXPOSE 5001

FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
RUN curl -sL https://deb.nodesource.com/setup_12.x | bash -
RUN apt install -y nodejs
RUN pwd && ls /
WORKDIR /src
COPY ["src/WebUI/WebUI.csproj", "src/WebUI/"]
RUN pwd && ls
COPY ["src/Application/Application.csproj", "src/Application/"]
COPY ["src/Domain/Domain.csproj", "src/Domain/"]
COPY ["src/Infrastructure/Infrastructure.csproj", "src/Infrastructure/"]
RUN dotnet restore "src/WebUI/WebUI.csproj"
COPY . .
WORKDIR "/src/src/WebUI"
RUN dotnet build "WebUI.csproj" -c Release -o /app/build

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

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