Hey, you would need structured JSON logs with the level attribute for Railway to filter by attributes. https://docs.railway.com/guides/logs#structured-logs

Hey, currently I use this library for logging: https://github.com/apple/swift-log

So I assumed this would be enough to provide the needed metadata.

Sorry, but if this doesn't support JSON logging then it is not going to work.

Ah okay, thanks.

Or do you know if it's possible to create custom filters for these levels? Or even OTel support?

If you are using plaintext logs then you need to do a plaintext search - "[ WARNING ]"

Would it be also possible to set alarms to it?
So that either when within 5min 2 "[ WARNING ]" or "[ Error ]" gets logged to the console or based on http staus codes?