Debugging iOS Connections for Maui Application

[Mike-E-angelo]

I have an appsettings.json that looks like the following for a Maui application:

"Serilog": {
    "LevelSwitches": { "$controlSwitch": "Verbose" },
    "WriteTo": [
      {
        "Name": "Seq",
        "Args": {
          "serverUrl": "http://<ip>:5341",
          "apiKey": ""
        }
      },
      {
        "Name": "OpenTelemetry",
        "Args": {
          "Endpoint": "http://<ip>:5341/ingest/otlp/v1/logs",
          "Protocol": "HttpProtobuf",
          "resourceAttributes": {
            "service.name": "<application>"
          }
        }
      }
    ]
  }

Where <ip> is either localhost or the IP address of the host machine. I've tried both. This configuration works for Windows and Android, but iOS is putting up a fight, failing silently and not emitting any activity.

I can confirm that the sinks get applied to the LoggerConfiguration and I see them while debugging.

I have applied the configuration as described here:
https://learn.microsoft.com/en-us/dotnet/maui/data-cloud/local-web-services?view=net-maui-9.0#ios-ats-configuration

Yet this doesn't seem to do anything. 🤔

I am looking for any pointers on how to figure out what is going on.

Thank you for any assistance you can provide. 🙏

[Mike-E-angelo]

Doh. Naturally, after posting this I got the genius idea to try connecting to the target machine from Safari. Chrome on the Android connects but the iOS simulator does not connect.

So, this seems to be a simulator-wide issue. I will investigate more and report back findings here.

[Mike-E-angelo]

Talk about a mental pretzel. OK. So the Android emulator runs local to the Windows machine that is launching it. The MacOS is another machine altogether on the network and is where the iOS simulator images sit. I noticed that Safari on the MacOS also couldn't connect to the local Seq install location so this was specific to the machine and not the simulator at all.

The answer was simple: I had to open the port on the Windows development machine where Seq was being run. 😅🤦 After opening the port everything works as expected everywhere. Welcome to cross-platform development!