Azure Function Information Logs not showing in App Insights

Question

Azure Function Information Logs not showing in App Insights

Sayed Reda 30

After migrating to Isolated process azure function, information logs stopped to be shown in application insights only Warning and Error logs are stored without even log level.

Here is a sample code:

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Here logs are shown in console:

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But here information logs are not shown and no log level is assigned for warning nor error

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Answer 1

Ryan Hill 30,281 Microsoft Employee Moderator

@Sayed Reda, CORRECTION on my part. Isolated worker model has a different logging configuration. Check out Guide for running C# Azure Functions in an isolated worker process | Microsoft Learn

Sayed Reda 30 Reputation points

2024-04-24T12:57:18.9733333+00:00

Thanks. It works now and I can see the logs but LogLevel is still missing, any idea why?
Sayed Reda 30 Reputation points

2024-04-24T13:00:22.1966667+00:00

As shown in the above screenshot, log type (log level) is not set while it is showing on the console
Greg Moyer 6 Reputation points

2024-07-18T14:40:18.0866667+00:00

Can you please clarify this documentation. It says, "The Functions host and the isolated process worker have separate configuration for log levels". Does this mean there is no way in configuration or environment variables to override the LogLevels like we had in in-process? The documentation does not mention what/where the configuration is for the isolated process worker.

Answer 2

hossein jalilian 11,055 Volunteer Moderator

Thanks for posting your question in the Microsoft Q&A forum.

Verify the log level configuration in your logging framework. Ensure that the log level is appropriately set to capture Information logs. For example, in Serilog, you can set the minimum log level using MinimumLevel.Debug().

Please don't forget to close up the thread here by upvoting and accept it as an answer if it is helpful

Sayed Reda 30

I am not using Serilog only default logger.

Here is host.json

{
  "version": "2.0",
  "logging": {
    "logLevel": {
      "default": "Information",
      "Function": "Information",
      "Host.Aggregator": "Trace",
      "Host.Results": "Information"
    },
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": true,
        "excludedTypes": "Request"
      },
      "enableLiveMetricsFilters": true
    }
  }
}

Ryan Hill 30,281 Reputation points Microsoft Employee Moderator

2024-03-28T16:08:14.7833333+00:00

@Sayed Reda and you've walked through Application Insights logs are missing or incorrect - Azure | Microsoft Learn

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Azure Function Information Logs not showing in App Insights

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