如何使用dockerfile将参数传递到.NET Core项目 [英] How to pass parameters to a .NET core project with dockerfile

问题描述

我有一个 .NET 核心项目(使用Visual Studio并通过

I've got a .NET Core project (using visual studio and adding the docker files via the Visual Studio Tools for Docker).

我的DockerFile看起来像这样:

FROM microsoft/dotnet:1.0.1-core
ARG source=.
WORKDIR /app
COPY $source .
ENTRYPOINT ["dotnet", "MyApp.dll"]
CMD ["arg1", "arg2"]

我的问题是，如何将参数传递到项目中?

My question is, how do I pass parameters into the project?

public static void Main(string[] args)
{
    // how does `args` get populated?
}

推荐答案

我也使用了可由 docker-compse.yml 设置的环境变量

I used environment variables which can be set by docker-compse.yml too

public static class EnvironmentHelper
{
    public const string EnvironmentArguments = "DOTNETCORE_ARGUMENTS";
    private static string[] _arguments;
    public static string[] Arguments
    {
        get
        {
            bool argumentsExist = _arguments != null && _arguments.Any();
            if (!argumentsExist)
            {
                IDictionary environmentVariables = Environment.GetEnvironmentVariables();
                if (!environmentVariables.Contains(EnvironmentArguments))
                {
                    throw new Exception("Environment Arguments do not exist");
                }
                var argumentsHolder = environmentVariables[EnvironmentArguments] as string;
                const char argumentSeparator = ' ';
                _arguments = argumentsHolder?.Split(argumentSeparator);
            }
            return _arguments;
        }
    }
}

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