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docker - docker 文件 arg 变量未传递给 Linux 上的 asp.net 核心

问题描述

我有一个 Asp.Net core 3.1 应用程序，它像这样针对 linux 进行了 dockerized

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base 
ARG BUILD_CONFIGURATION=Release
ENV ASPNETCORE_ENVIRONMENT=Production
ENV DOTNET_USE_POLLING_FILE_WATCHER=true
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
WORKDIR /src
COPY . .
RUN dotnet restore "Api/Authentication/Authentication.csproj"
COPY . .
WORKDIR "/src/Api/Authentication"
RUN dotnet build "Authentication.csproj" -c $BUILD_CONFIGURATION -o /app/build
FROM build AS publish
RUN dotnet publish "Authentication.csproj" -c $BUILD_CONFIGURATION -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Authentication.dll"]

在 Azure Devops 管道中，构建模板如下所示。 在此处输入图像描述

但是构建失败并显示以下消息

##[错误]命令 '/bin/sh -c dotnet build "Authentication.csproj" -c $BUILD_CONFIGURATION -o /app/build' 返回非零代码：1

Arg BUILD_CONFIGURATION 似乎不接受来自 devops piplline 的值

标签： dockerasp.net-coreazure-devops

解决方案

ARG 指令在定义它的构建阶段结束时超出范围。要在多个阶段中使用 arg，每个阶段都必须包含 ARG 指令。更多信息，可以参考ARG 范围

因此，您需要在构建和发布阶段定义ARG BUILD_CONFIGURATION=Release 。

FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-buster-slim AS base 
ARG BUILD_CONFIGURATION=Release
ENV ASPNETCORE_ENVIRONMENT=Production
ENV DOTNET_USE_POLLING_FILE_WATCHER=true
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/core/sdk:3.1-buster AS build
ARG BUILD_CONFIGURATION=Release
WORKDIR /src
COPY . .
RUN dotnet restore "Api/Authentication/Authentication.csproj"
COPY . .
WORKDIR "/src/Api/Authentication"
RUN dotnet build "Authentication.csproj" -c $BUILD_CONFIGURATION -o /app/build
FROM build AS publish
ARG BUILD_CONFIGURATION=Release
RUN dotnet publish "Authentication.csproj" -c $BUILD_CONFIGURATION -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "Authentication.dll"]

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