fluent-bit loki output plugin

NOTICE! fluent-bit-go-loki is now merged in loki repository.

Windows binaries are available in release pages.

DockerHub base images is available in DockerHub.

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

Or,

$ docker build . -t fluent-bit/loki-plugin

and then, specify Url parameter as environment variable:

$ docker run -it -e="LOKI_URL=http://[YOURHOST]:[YOURPORT]/loki/api/v1/push" fluent-bit/loki-plugin

Using docker image from docker hub.

$ docker pull cosmo0920/fluent-bit-go-loki:latest

Other released images are available in DockerHub's fluent-bit-go-loki image tags.

Prerequisites

Go 1.11+
gcc (for cgo)
make (for Makefile)

Building

$ make

Configuration Options

Key	Description	Default
Url	Url of loki server API endpoint	http://localhost:3100/loki/api/v1/push
BatchWait	Time to wait before send a log batch to Loki, full or not. (unit: sec)	1 second
BatchSize	Log batch size to send a log batch to Loki (unit: Bytes)	10 KiB (10*1024 Bytes)
Labels	labels for API requests	job="fluent-bit" (describe below)
LogLevel	Specify log level	info
RemoveKeys	Comma separated list of needless record keys to remove.	none
LabelKeys	Comma separated list of keys to use as stream labels.	none

Example:

add this section to fluent-bit.conf

[Output]
    Name loki
    Match *
    Url http://localhost:3100/loki/api/v1/push
    BatchWait 10 # (10msec)
    BatchSize 30 # (30KiB)
    Labels {test="fluent-bit-go",lang="Golang"}
    RemoveKeys key1,key2

Useful links

fluent-bit-go