Serilog Sink for OpenObserve

This Serilog Sink allows to log to OpenObserve.

What is this sink ?

This project is a sink for the OpenObserver.

Quick start

Install sink in your project.

dotnet add package Serilog.Sinks.OpenObserve-KKP

Register the sink in code.

var logger = new LoggerConfiguration()
    .WriteTo
    .OpenObserve(
        "url",
        "organization"
        "login",
        "key"
    ).CreateLogger();

You can optionally add parameter streamName to write logs to specified stream (default value is default)

Use serilog log method to log details (please check sample project).

_logger.Debug("Debug message");

Using appsettings.json configuration

First install Serilog.Settings.Configuration package if you don't already have it:

dotnet add package Serilog.Settings.Configuration

In your appsettings.json file, under the Serilog node, add following entries:

{
  "Serilog": {
    "Using": ["Serilog.Sinks.OpenObserve-KKP"],
    "MinimumLevel": "Debug",
    "WriteTo": [
      {
        "Name": "OpenObserve",
        "Args": {
          "url": "https://api.openobserve.ai",
          "organization": "[organization]",
          "login": "[login]",
          "key": "[key]"
        }
      }
    ],
    "Properties": {
      "Application": "OpenObserve.Tests"
    }
  }
}

With provided configuration following code should be send:

{"@t":"2023-08-03T20:53:20.2872427Z","@m":"Debug message","@mt":"Debug message","@i":"9515f1e2","@l":"Debug","SourceContext":"OpenObsere.Sample.CustomBackgroundService","Application":"OpenObserve.Tests"}

On server side it should looks like:

{
  "_i": "9515f1e2",
  "_l": "Debug",
  "_m": "Debug message",
  "_mt": "Debug message",
  "_t": "2023-08-03T20:53:20.2872427Z",
  "_timestamp": 1691096013274896,
  "application": "OpenObserve.Tests",
  "sourcecontext": "OpenObsere.Sample.CustomBackgroundService"
}

Please note:

• field _timestamp is added on server side
• field _mt contains message template, e.g Counter: {CounterValue}
• field _m contains rendered message, e.g. Counter: 2
• field _i is calculated on message template text, it's different for each different message template

More information about using Serilog is available in the Serilog Documentation.