ASP.NET Core MVC Health Check failing

Question

I try to run a ASP.NET Core MVC Web application on the Swisscom Appcloud. But when I start the Application I get following Error-Message in the Console:

2017-01-24 14:29:53 [CELL/0] ERR Timed out after 1m0s: health check never passed. 

Its looks like the Appcloud cannot check the Health of my Application. Do I need to install a Nuget-Package or something else to get this up and running?

Thanks for your effort

Answer 1

As gsmachado has already mentioned, you must listen to a specific port.

The .NET Core buildpack configures the app web server automatically so you don’t have to handle this yourself. But you have to prepare your app in a way that allows the buildpack to deliver this information via the command line to your app.

The buildpack will start your app with the following command:

$ dotnet run --server.urls http://0.0.0.0:${PORT}

Therefore you have to add the command line as a configuration provider and then add the UseConfiguration extension to pass the configuration to the WebHostBuilder

e.g.:

var config = new ConfigurationBuilder()
.AddCommandLine(args)
.Build();

var host = new WebHostBuilder()
    .UseKestrel()
    .UseConfiguration(config)
    .UseStartup<Startup>()
    .Build();