Question

我在我的Windows机器上安装了Docker。目前我的vsproject设置可以通过Visual Studio的“Run with Docker”按钮运行Web应用程序。

但是当我进入powershell并使用

构建我自己的图像时

docker build -t blog .

输出：

PS C:\Users\Acina\sites\Blog> docker build -t blog .
unable to prepare context: unable to evaluate symlinks in Dockerfile path: GetFileAttributesEx C:\Users\Acina\sites\Blog
\Dockerfile: The system cannot find the file specified.
PS C:\Users\Acina\sites\Blog> cd Blog
PS C:\Users\Acina\sites\Blog\Blog> docker build -t blog .
Sending build context to Docker daemon  3.584kB
Step 1/6 : FROM microsoft/aspnetcore:2.0
 ---> 452ca00e5495
Step 2/6 : ARG source
 ---> Using cache
 ---> 73e5e625c084
Step 3/6 : WORKDIR /app
 ---> Using cache
 ---> 9cb30c8476e4
Step 4/6 : EXPOSE 80
 ---> Using cache
 ---> 6d1a8f3cc094
Step 5/6 : COPY ${source:-obj/Docker/empty} .
 ---> Using cache
 ---> aedf4f7d5b5d
Step 6/6 : ENTRYPOINT dotnet Blog.dll
 ---> Using cache
 ---> d3d785062d3f
Successfully built d3d785062d3f
Successfully tagged blog:latest
SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and director
ies added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions f
or sensitive files and directories.
PS C:\Users\Acina\sites\Blog\Blog>

但是，当我尝试使用：docker run -p 5000:5000 blog

时

PS C:\Users\Acina\Documents\Visual Studio 2017\Projects\Blog\Blog> docker run -p 5000:5000 blog
[ERROR] docker : Did you mean to run dotnet SDK commands? Please install dotnet SDK from: 
[ERROR] At line:1 char:1
[ERROR] + docker run -p 5000:5000 blog
[ERROR] + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ERROR]     + CategoryInfo          : NotSpecified: (Did you mean to...tnet SDK from: :String) [], Remote 
[ERROR]    Exception
[ERROR]     + FullyQualifiedErrorId : NativeCommandError
[ERROR]  
[ERROR]   http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
[ERROR]

从目前为止我的研究看来，似乎docker无法找到我的.dll文件，该文件位于Projects \ Blog \ Blog \ bin \ Debug \ netcoreapp2.0 \ Blog.dll

下

这是我的Dockerfile

FROM microsoft/aspnetcore:2.0
ARG source
WORKDIR /app
EXPOSE 80
COPY ${source:-obj/Docker/empty} .
ENTRYPOINT ["dotnet", "Blog.dll"]

Answer 1

我遇到了同样的问题。看起来，dotnet core 2.0在运行dotnet restore之前就已经完成了。但这是个问题，因为你需要SDK（microsoft / dotnet：2.0-sdk）。因此，如果您想进行开发，只需使用sdk image替换runtime即可。但是，如果您想要生产版本，可以使用：

FROM microsoft/dotnet:2.0-sdk
WORKDIR /app

# If you need to restore, publish etc...
#COPY *.csproj ./
#RUN dotnet restore

# build runtime image
FROM microsoft/dotnet:2.0-runtime 
WORKDIR /app
COPY ${source:-obj/Docker/empty} .
ENTRYPOINT ["dotnet", "Blog.dll"]

以下是生产解决方案的原始示例：https://github.com/dotnet/dotnet-docker-samples/tree/master/dotnetapp-prod

希望有所帮助！

Answer 2

这是Visual Studio＆＃34; Docker＆＃34;模板工作 - 它假定构建的结果仅用于Visual Studio。

我建议您查看此guide in the Docker documentation。它展示了如何在容器中正确构建Docker。

Docker和NETCore 2.0无法运行docker image

2 个答案: