.net core 无法作为独立应用程序运行。在码头工人上

Question

我有这个 .net core 的 Dockerfile

FROM mcr.microsoft.com/dotnet/core/aspnet:3.0-buster-slim AS base
WORKDIR /app
EXPOSE 8080

FROM mcr.microsoft.com/dotnet/core/sdk:3.0-buster AS build
WORKDIR /src
COPY ["./WebApplication1.csproj", "WebApplication1/"]
RUN dotnet restore "WebApplication1/WebApplication1.csproj"
COPY . .
WORKDIR "/src/WebApplication1"
RUN dotnet build "WebApplication1.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "WebApplication1.csproj" -c Release -o /app/publish --self-contained

FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "WebApplication1.dll"]

当我运行 docker 时，出现错误：

A fatal error was encountered. The library 'libhostpolicy.so' required to execute the application was not found in '/app/'.

我读过这篇文章，它与我的问题无关

Answer 1

--独立需要 -r (--runtime)

-r, --runtime 要发布的目标运行时。这在创建独立部署时使用。默认是发布依赖于框架的应用程序。

我首先将 Dockerfile 中的发布命令更改为：

RUN dotnet publish "WebApplication1.csproj" -c Release -o /app/publish --self-contained --runtime linux-64

新部分：

我运行以下命令

$ RUN dotnet publish "WebApplication1.csproj" -c Release -o /app/publish --self-contained

我收到以下错误：

/usr/local/share/dotnet/sdk/3.0.100/Sdks/Microsoft.NET.Sdk/targets/Microsoft.NET.RuntimeIdentifierInference.targets(127,5): error NETSDK1031: It is not supported to build or publish a self-contained application without specifying a RuntimeIdentifier.  Please either specify a RuntimeIdentifier or set SelfContained to false. [/Users/ziaullahkhan/Code/SelfContainedApp/SelfContainedApp.csproj]

我将命令更改为：

$ dotnet publish -c Release --self-contained --runtime linux-x64 -o out

它成功地发布了所有内容。

然后我构建了 docker 镜像。在容器上启动 shell

$ docker run -it khanziaullah/sca bash
root@eb5dc8083aa3:/app/out# ls -l libhostpolicy.so 
-rwxr--r-- 1 root root 327384 Sep 13 15:21 libhostpolicy.so
root@eb5dc8083aa3:/app/out# dotnet SelfContainedApp.dll
Hello World!

所以我看到了 libhostpolicy.so 文件。

尝试启动 shell 并查找所有依赖项的构建和复制位置。COPY 命令可能出错。