Logging

Releval logs through the standard ASP.NET Core logging framework, so these settings follow the conventional .NET Logging configuration. Log output is written to the container's standard output (stdout), where your container runtime or orchestrator collects it - via docker logs, a Docker logging driver, or a platform such as Kubernetes. Releval does not write log files of its own, so forwarding logs to a file or a central aggregator is the job of that surrounding layer, not a Releval setting.

Two things are usually worth configuring: how much is logged, and in what format.

Logging format

The format is set by the console formatter - readable plain text by default, or structured JSON when you want a log aggregator to parse each entry:

Environment Variable

environment:
    - Logging__Console__FormatterName=json

appsettings.json

{
  "Logging": {
    "Console": {
      "FormatterName": "json"
    }
  }
}

Log levels

Log verbosity is set per category using the levels below.

Variable	Default	Description
Logging__LogLevel__Default	Warning	Default log level
Logging__LogLevel__Microsoft.AspNetCore	Warning	Web framework logs
Logging__LogLevel__Microsoft.EntityFrameworkCore	Warning	Database query logs

Supported log levels, from low to high:

• Trace
• Debug
• Information
• Warning
• Error
• Critical

Environment Variable

environment:
  - Logging__LogLevel__Default=Warning
  - Logging__LogLevel__Microsoft.AspNetCore=Warning

appsettings.json

{
  "Logging": {
    "LogLevel": {
      "Default": "Warning",
      "Microsoft.AspNetCore": "Warning"
    }
  }
}