CODEWITHSUNDEEP
dockerfileclean-architectureasp.net-core-5.0
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Reputation: 6353

Dockerfile weird paths generated by Visual Studio

I'm using Jason Taylor's Clean Architecture template and I wonder why his WebUI Dockerfile is generated by Visual Studio just like below.

It sets WORKDIR to /src and then copies each project from /src/ProjectDir/Project.csproj. What's the point of WORKDIR in that case? Look at WORKDIR "/src/src/WebUI". Why /src/src? There is only one src directory.

enter image description here

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"]

Upvotes: 1

Views: 633

Answers (1)

Simon
Simon

Reputation: 915

I suspect this is because WORKDIR /src will create a directory called /src AND change directories into it. After changing into it, it will copy files from the host's relative src folder and into another subdirectory called src (on the container). So the full absolute path becomes /src/src. You can confirm this by adding RUN pwd && ls before the WORKDIR and after the first COPY.

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"]

Upvotes: 1

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