如何通过Azure门户更改Azure功能的日志记录详细程度？

Question

All the doco I've found shows how to set the logging verbosity of an Azure function via the hosts.json file with the config below.

I would like to change the logging verbosity without having to redeploy this file.

However, I can't see any samples where the verbosity is being set via the portal. I've tried using portal Application Settings with the App Setting Name logging:logLevel.default but that has no affect.

Does anyone know if this can be done?

{
  "version": "2.0",
  "logging": {
    "fileLoggingMode": "debugOnly",
    "logLevel": {
      // For all functions
      "Function": "Trace",
      // Default settings, e.g. for host
      "default": "Trace"
    }
  }
}

Please note I'm running from a package file which is the recommended approach.

Answer 1

You can also set these settings in host.json file without re-deploy. There is a host.json setting on the azure portal as well.

Please go to your function app -> Overview -> Function app settings, then you can see there is a host.json, you can set log level there, then save and no need to re-deploy(And remember to change the edit mode of your function app as Read/Write as described in screenshot below).

remember to change the edit mode of your function app as Read/Write