serilog-sinks-fluentd

A Sink that writes logs into Fluentd

Installation

This sink is distributed via NuGet package. Install it by running

Install-Package Serilog.Sinks.Fluentd

Usage

The sink lives in Serilog.Sinks.Fluentd namespace. Include it into your program and then simply add the Fluentd sink to your LoggerConfiguration object:

using Serilog;
using Serilog.Sinks.Fluentd;

var log = new LoggerConfiguration().WriteTo.Fluentd().CreateLogger();
log.Information($"That's it!");

When no arguments are provided to the sink it will emit only events with Informational level and above via TCP protocol to the localhost:24224.

Configuration

The sink provides three configuration options:

• Fluentd(string host, int port, LogEventLevel restrictedToMinimumLevel = Debug) will cause sink to emit events to the specified host and port via TCP. Optional restrictedToMinimumLevel parameter is used to override the default minimum level filter applied by the sink.

• Fluentd(string udsSocketFilePath, LogEventLevel restrictedToMinimumLevel = Debug) will cause sink to emit events into the specified UNIX domain socket file. Optional restrictedToMinimumLevel parameter is used to override the default minimum level filter applied by the sink.

• Fluentd(FluentdSinkOptions option = null) will cause sink to emit events to the endpoint (either TCP address or UNIX domain socket file) defined in the FluentdSinkOptions object option. If no options object is provided, events will be emitted to the localhost:24224 via TCP. Please note that when sink is configured like this, only events with level Informational and above will be emitted. This behaviour cannot be overriden.

Examples

Creating a logger that will emit events via TCP

var log = new LoggerConfiguration().WriteTo.Fluentd("localhost", 9100).CreateLogger();

Creating a logger that will emit events into a UNIX domain socket file

var log = new LoggerConfiguration().WriteTo.Fluentd("/var/run/fluentd/fluentd.sock").CreateLogger();

Creating a logger that will emit Verbose-level events (and above) into a UNIX domain socket file

using Serilog.Events; // exposes LogEventLevel

var log = new LoggerConfiguration().MinimumLevel.Verbose().WriteTo.Fluentd("/var/run/fluentd/fluentd.sock", LogEventLevel.Verbose).CreateLogger();

Creating a UNIX domain sockets file logger with sinkOptions object

FluentdSinkOptions sinkOptions = new FluentdSinkOptions("/var/run/fluentd/fluentd.sock");
var log = new LoggerConfiguration().WriteTo.Fluentd(sinkOptions).CreateLogger();