docker - Visual Studio 生成的 Dockerfile 不适用于手动 docker build

Question

我想对现有的 .NET core 5 应用进行 docker 化，并使用容器工具生成 Dockerfile。当我使用 Visual Studio 2022 进行调试时，它可以工作，但是当我使用命令 docker build -t some-name . 手动运行它时，它会生成以下错误:

Step 7/21 : COPY ["MechEng.MovableBridges.Api/MechEng.MovableBridges.Api.csproj", "MechEng.MovableBridges.Api/"]
COPY failed: file not found in build context or excluded by .dockerignore: stat MechEng.MovableBridges.Api/MechEng.MovableBridges.Api.csproj: file does not exist

为什么找不到文件？

这是我在 MechEng.MovableBridges.Api 文件夹中的 Dockerfile:

#See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.

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

FROM mcr.microsoft.com/dotnet/sdk:5.0 AS build
WORKDIR /src
COPY ["MechEng.MovableBridges.Api/MechEng.MovableBridges.Api.csproj", "MechEng.MovableBridges.Api/"]
COPY ["MechEng.MovableBridges.Infrastructure/MechEng.MovableBridges.Infrastructure.csproj", "MechEng.MovableBridges.Infrastructure/"]
COPY ["MechEng.MovableBridges.MathCad/MechEng.MovableBridges.Infrastructure.MathCad.csproj", "MechEng.MovableBridges.MathCad/"]
COPY ["MechEng.MovableBridges.Application/MechEng.MovableBridges.Application.csproj", "MechEng.MovableBridges.Application/"]
COPY ["MechEng.MovableBridges.Domain/MechEng.MovableBridges.Domain.csproj", "MechEng.MovableBridges.Domain/"]
RUN dotnet restore "MechEng.MovableBridges.Api/MechEng.MovableBridges.Api.csproj"
COPY . .
WORKDIR "/src/MechEng.MovableBridges.Api"
RUN dotnet build "MechEng.MovableBridges.Api.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "MechEng.MovableBridges.Api.csproj" -c Release -o /app/publish

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

Answer 1

您的命令失败，因为构建上下文错误。 Visual Studio 使用解决方案根文件夹作为构建上下文，您(可能)使用项目的 dockerfile 的位置。您可以阅读有关 docker build 命令 here 的更多信息。 .

您的命令应该类似于:

docker build -f "<path-to-your-dockerfile>" -t some-name "<!!!path-to-your-solution-folder!!!>"

您可以在输出窗口中看到由 Visual Studio 执行的确切命令，并从下拉框中选择“容器工具”。