Question, maybe a bug about sentry, serilog and setting dsn

[jorisrfh]

Hello,

I’m running into a curious bug? with the configuration of sentry and serilog and setting the dsn.

I’m using c#, dotnet core. I’m trying to setup sentry through startup.cs and failing.

My program.cs:

        private static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .UseConsoleLifetime(options => options.SuppressStatusMessages = true)
                .UseSerilog()

                //works
                .ConfigureWebHostDefaults(webBuilder => webBuilder.UseSentry("some valid sentry url"))

                //should work but doesn't?
                //.ConfigureWebHostDefaults(webBuilder => webBuilder.UseSentry())

                .ConfigureWebHostDefaults(webBuilder => webBuilder.UseStartup<Startup>());
    }

My startup.cs:

            var logConfiguration = new LoggerConfiguration();

            logConfiguration.WriteTo.Sentry(options =>
            {
                options.Dsn = "Same valid sentry url";
                options.DiagnosticLevel = SentryLevel.Error;
                options.MinimumBreadcrumbLevel = LogEventLevel.Information;
                options.MinimumEventLevel = LogEventLevel.Error;
            });

            var logger = logConfiguration.CreateLogger();

            Log.Logger = logger;

The issue is I would like to set the dsn in the startup.cs and not in the program.cs. However If I set it in the startup.cs and leave it empty in the program.cs nothing is logged to sentry.
So when I put in 'UseSentry()' pwhithout an url in program.cs I do not get any logging, I can see in the debugger the logger has a sink and the sink has the sentry options, including the dsn, as set in startup.cs

Any advice would be welcome.

[mattjohnsonpint]

The DSN needs to be set the first time that Sentry is initialized. For an ASP.NET Core app, that is when UseSentry is called from the web builder in program.cs. You can instead use appsettings.json if you like, but the DSN needs to be part of the Sentry configuration section, not the Sentry subsection of Serilog. See: #1800 (comment)