docker - ASP.NET Core 2.0 在 Kubernetes 中启动 Kestrel 时出错

Question

创建了一个新的 ASP.NET Core 2.0 项目，它在本地运行良好。然后在本地的 Docker 容器中运行它后，它也可以正常工作。但是当我尝试在 Kubernetes pod 中使用 Docker 镜像时，它会运行几分钟，然后给我这个:

    Unhandled Exception: System.InvalidOperationException: A path base can 
    only be configured using IApplicationBuilder.UsePathBase().
    at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.
    <BindAddressAsync>d__7.MoveNext()

这是我的Program.cs:

public class Program
{
    public static void Main(string[] args)
    {
         BuildWebHost(args).Run();
    }

    public static IWebHost BuildWebHost(string[] args) =>
         WebHost.CreateDefaultBuilder(args)
             .UseStartup<Startup>()
             .Build();
}

Startup.cs:

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
            app.UseWebpackDevMiddleware(new WebpackDevMiddlewareOptions
            {
                HotModuleReplacement = true,
                ReactHotModuleReplacement = true
            });
        }
        else
        {
            app.UseExceptionHandler("/Home/Error");
        }

        app.UseStaticFiles();

        app.UseMvc(routes =>
        {
            routes.MapRoute(
                name: "default",
                template: "{controller=Home}/{action=Index}/{id?}");

            routes.MapSpaFallbackRoute(
                name: "spa-fallback",
                defaults: new { controller = "Home", action = "Index" });
        });
    }
}

Answer 1

发生此错误时，我们使用 FROM microsoft/aspnetcore-build:1.1 基础镜像作为构建和运行时。在我们遇到错误时，我们只是尝试升级到 FROM microsoft/aspnetcore-build:2.0。我不确定这张图片的具体问题是什么，但 Kubernetes 不喜欢它。

稍后，我们将 dockerfile 切换为多阶段；使用 FROM microsoft/aspnetcore-build:1.1 构建并使用 FROM microsoft/dotnet:1.1-runtime 运行，当我们将其升级到相应的 2.0 版本时，我们没有不会再遇到这个错误了。