崩溃后重新启动ASP.NET Core App

Question

I'm new to ASP.NET Core and learning. Just want to know if there is a way to restart my app after the App Crashes?

Or is this kind of scenario handled different?

Couldnt find any Documentation on this, can someone point me to the right direction?

Answer 1

If you host your ASP.NET Core application behind a full web server used as reverse proxy as IIS, it will get done automatically. IIS will receive a request and transmit it to your application, (re)launching it if necessary. You can check that great article: https://weblog.west-wind.com/posts/2016/Jun/06/Publishing-and-Running-ASPNET-Core-Applications-with-IIS

On the contrary, if you use simply Kestrel (but it's not suitable for production really), Kestrel will stop and that's it, your app is gone.

Answer 2

When hosting your ASP.NET Core app as a Windows Service you can configure it to automatically restart if the service process terminates.

In your code, just do Environment.Exit(1) to terminate the process and then let the hosting environment restart it.

How this is configured in other environments I don't know, but I guess most hosts should have this configurable in some way. IIS probably do this allready.

However, this is only applicable to exceptions that do not allready kill your process. Exceptions on a request thread don't usually crash your app but you may want to take it down and restart in anyway, perhaps if you have in-memory state that may end up in a undefined and possibly hazardous way after an exception.