如何為多個項目構建一個 docker 鏡像？

Question

在我的項目中，我使用 .net core 2.2 ，最近我在我的項目中使用了額外的類庫。 當我嘗試構建我的映像時，它找不到我的 dll。

我的 docker 文件如下所示：

FROM mcr.microsoft.com/dotnet/core/sdk:2.2 AS build-env
WORKDIR /app
# Copy csproj and restore as distinct layers
COPY *.csproj ./
RUN dotnet restore

COPY . ./
RUN dotnet publish -c Release -o out
# Build runtime image
FROM mcr.microsoft.com/dotnet/core/aspnet:2.2
WORKDIR /app
EXPOSE 80
COPY --from=build-env /app/out .
ENTRYPOINT ["dotnet", "LibvirtManagement.dll"]

我收到這樣的錯誤：

 The project file "/JenkinsService/JenkinsService.csproj" was not found. 
 [/app/LibvirtManagement.sln]
The command '/bin/sh -c dotnet publish -c Release -o out' returned a non-zero code: 1

Answer 1

錯誤消息非常簡單，您在構建它的JenkinsService.csproj容器中缺少該項目中的JenkinsService.csproj和其他文件。 您還需要復制這些文件。

如果您使用的是 Visual Studio，最簡單的方法是右鍵單擊可執行項目文件（在您的情況下為LibvirtManagement ），然后選擇Add -> Docker Support... 。 它將為您自動生成正確的Dockerfile

編輯：這是這個工具為我創建的：

#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/core/aspnet:2.2-stretch-slim AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/core/sdk:2.2-stretch AS build
WORKDIR /src
COPY ["LibvirtManagement/LibvirtManagement.csproj", "LibvirtManagement/"]
COPY ["JenkinsService/JenkinsService.csproj", "JenkinsService/"]
RUN dotnet restore "LibvirtManagement/LibvirtManagement.csproj"
COPY . .
WORKDIR "/src/LibvirtManagement"
RUN dotnet build "LibvirtManagement.csproj" -c Release -o /app/build

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

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