Asp.net core based docker image failing

1

I have been running a docker based asp.net core app, initially when i set it up a month back it was working but now we are getting an error. We tried reverting to the original deployment which was working earlier but still it is not working.

Microsoft.AspNetCore.Server.Kestrel[0], Unable to start Kestrel. System.Net.Sockets.SocketException (13): Permission denied,

I tried explicitly setting the port but still the same issue exists.

2

Hi @Pramod_Pallath_Vasud, welcome to the Render community!

I took a look at your service and it looks like you specify port 80 in your environment variable which may be the cause of the permission denied error. Based on what I found in this thread, .NET 5 - Unable to start Kestrel - System.Net.Sockets.SocketException (13): Permission denied · Issue #29139 · dotnet/aspnetcore · GitHub you might need to specify a port > 1024. Can you try that and see if it helps?

3

Thanks. That worked. For anyone who faced this issue, Added an environment variable called PORT and used the port 1025.

in the asp.net core application also i made the following change

public static IHostBuilder CreateHostBuilder(string args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
// webBuilder.UseStartup();

                var port = Environment.GetEnvironmentVariable("PORT");
                webBuilder.UseStartup<Startup>()
                .UseUrls("http://*:" + port);
            });