ASP.NET Core MVC Health Check failing - asp.net

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

By default, Cloud Foundry makes a health check by trying to connect to the port which the application is exposing.
If your application is not exposing ANY port (e.g., it's not a web service with APIs and so on), then you should add the health-check-type attribute to none, as described here.
If after that you still get errors, then I suggest you to find where your application is listening to a given port. In Cloud Foundry you must listen to $PORT, which is a environment variable. You can check an example of that here.

Answer 2

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();