fluent-bit loki output plugin

Windows binaries are available in release pages.

This plugin works with fluent-bit's go plugin interface. You can use fluent-bit loki to ship logs into grafana datasource with loki.

The configuration typically looks like:

fluent-bit --> loki --> grafana <-- other grafana sources

Usage

$ fluent-bit -e /path/to/built/out_loki.so -c fluent-bit.conf

Prerequisites

Go 1.11+
gcc (for cgo)

Building

$ make

Configuration Options

Key	Description	Default
Url	Url of loki server API endpoint	http://localhost:3100/api/prom/push
BatchWait	Waiting time for batch operation (unit: msec)	10 milliseconds
Url	Batch size for batch operation (unit: KiB)	10 KiB
Labels	labels for API requests	job="fluent-bit" (describe below)

Example:

add this section to fluent-bit.conf

[Output]
    Name loki
    Match *
    Url http://localhost:3100/api/prom/push
    BatchWait 10 # (10msec)
    BatchSize 30 # (30KiB)
    # interpreted as {test="fluent-bit-go", lang="Golang"}
    Labels {"labels": [{"key": "test", "label": "fluent-bit-go"},{"key": "lang", "label": "Golang"}]}

Useful links