Azure Function App Logging

Question

Hello Team, I am using an Azure Function with Python. I am getting lot of logging when I am trying to authenticate with Service Principal and also writing the data to Event Hub (which is more of information logging) . For Example when writing the data to event hub, I am getting the following information/trace logging. Link state changed: <LinkState.DETACHED: 0> -> <LinkState.DETACHED: 0> Management link receiver state changed: <LinkState.DETACHED: 0> -> <LinkState.DETACHED: 0> Link state changed: <LinkState.DETACHED: 0> -> <LinkState.DETACHED: 0 when reading the blob from storage account , I am getting the following information / trace logging. Response status: 200
Response headers:
'Cache-Control': 'no-store, no-cache'
'Pragma': 'no-cache'
'Content-Type': 'application/json; charset=utf-8'
'Expires': '-1'
'Strict-Transport-Security': 'REDACTED'
'X-Content-Type-Options': 'REDACTED'
'P3P': 'REDACTED'
'client-request-id': 'REDACTED'
'x-ms-request-id': '90310a24-a0e5-45e8-ac5d-7d57905e3a00'
'x-ms-ests-server': 'REDACTED'
'x-ms-clitelem': 'REDACTED'
'X-XSS-Protection': 'REDACTED'
'Set-Cookie': 'REDACTED'
'Date': 'Fri, 21 Apr 2023 20:11:20 GMT'
'Content-Length': '1316' Response status: 200
Response headers:
'Cache-Control': 'max-age=86400, private'
'Content-Type': 'application/json; charset=utf-8'
'Strict-Transport-Security': 'REDACTED'
'X-Content-Type-Options': 'REDACTED'
'Access-Control-Allow-Origin': 'REDACTED'
'Access-Control-Allow-Methods': 'REDACTED'
'P3P': 'REDACTED'
'x-ms-request-id': '1fd1f965-8d58-4931-8c2d-75e6c9481000'
'x-ms-ests-server': 'REDACTED'
'X-XSS-Protection': 'REDACTED'
'Set-Cookie': 'REDACTED'
'Date': 'Fri, 21 Apr 2023 20:11:20 GMT'
'Content-Length': '945' Is there a way i can reduce the logging and get only the warning, errors and exception logging while executing the function app. Thanks

Answer 1

You are able to configure azure function logging via host.json, and to tune logs for specific library as needed.
For example,

{
  "version": "2.0",
  "logging": {
    "logLevel": {
      "default": "Warning",
      "Function": "Warning",
      "Host.Results": "Warning",
      "Host.Aggregator": "Warning",
      "Azure.Core": "Error" // Example of configuring a specific library for error logs only
    }
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "excludedTypes": "Request"
      }
    }
  },
  "extensionBundle": {
    "id": "Microsoft.Azure.Functions.ExtensionBundle",
    "version": "[3.*, 4.0.0)"
  },
  "functionTimeout": "-1"
}

more information can be found here